What is the mass in grams of \( \mathrm{CO}_{2} \) that can be produced from the combustion of \( 5.39 \) moles of butane according to this equation: \[ 2 \mathrm{C}_{4} \mathrm{H}_{10}(\mathrm{~g})+1

Answers

Answer 1

The mass of CO₂ that can be produced from the combustion of 5.39 moles of butane is approximately 950 grams.

To find the mass of CO₂ produced from the combustion of 5.39 moles of butane, we need to use the stoichiometry of the balanced equation.

From the balanced equation, we can see that 2 moles of butane (C₄H₁₀) react to produce 8 moles of CO₂. Therefore, the molar ratio of butane to CO₂ is 2:8.

First, calculate the moles of CO₂ produced:

5.39 moles of butane × (8 moles of CO₂ / 2 moles of butane) = 21.56 moles of CO₂

Next, convert moles of CO₂ to grams using the molar mass of CO₂:

Molar mass of CO₂ = 12.01 g/mol (atomic mass of carbon) + 2 * 16.00 g/mol (atomic mass of oxygen) = 44.01 g/mol

Mass of CO₂ = 21.56 moles of CO₂ × 44.01 g/mol = 949.7956 g ≈ 950 g

Therefore, the mass of CO₂ that can be produced from the combustion of 5.39 moles of butane is approximately 950 grams.

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Related Questions

An analytical chemist is titrating 171.6 ml. of a 0.3800M solution of diethylamine ((C₂H₂), NH) w with a 0.7300M solution of HIO,. The pK, of diethylamine is 2.89. Calculate the pH of the base solution after the chemist has added 99.5 mL of the HIO, solution to it.

Answers

The pH of the base solution after the chemist has added 99.5 mL of the HIO₃ solution to it is 3.94.

The equation of the reaction is shown below;

C₄H₁₀N₂ + HIO₃ → C₄H₉N₂IO₃ + H₂O

We have to determine the pH of the base solution after the chemist has added 99.5 mL of the HIO₃ solution to it. We'll use the Henderson-Hasselbalch equation to solve this question. The Henderson-Hasselbalch equation is expressed as;

pH = pKa + log([base]/[acid])

where pH is the solution's acidity or basicity; pKa is the acid dissociation constant, and [base]/[acid] is the ratio of the base to acid concentration.

The pKb for diethylamine is given as 11.11; hence, pKa = 14 - 11.11 = 2.89

Molar mass of C₄H₁₀N₂ = 74 g/mol

No. of moles of C₄H₁₀N₂ = (0.3800 M) x (0.1716 L) = 0.065208 mol

No. of moles of HIO₃ = (0.7300 M) x (0.0995 L) = 0.0725885 mol

As per the equation, one mole of HIO₃ reacts with one mole of C₄H₁₀N₂. Hence, diethylamine is the limiting reagent.

Moles of diethylamine remaining = 0.065208 - 0.0725885 = -0.00738 (negative because diethylamine is limiting reagent)

Therefore, there's no diethylamine left to react with the water, and it gets entirely converted into its conjugate acid form, which is diethylammonium ion.

C₄H₁₀N₂ + H₂O → C₄H₁₁N₂O⁺ + OH⁻

Molarity of diethylamine = 0.3800; hence, its concentration = 0.065208 M.

The moles of diethylammonium ion formed = 0.065208 mol.

The volume of the solution = 171.6 + 99.5 mL = 0.2711 L

Therefore, the concentration of diethylammonium ion = 0.065208 mol / 0.2711 L = 0.2406 M

Now, we can use the Henderson-Hasselbalch equation to calculate the pH;

pH = pKa + log([base]/[acid])

pH = 2.89 + log(0.2406 / 0.065208)

pH = 2.89 + 1.0493pH = 3.94

Therefore, the pH of the base solution is 3.94.

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Which statement is true about the product formed in the reaction below? HBr CH3CH₂CH₂CH=CH₂ C6H5-C-0-0-C-C6H₂ 0 A secondary alkyl halide is formed. 0 The first step in the mechanism is protonation of the alkene. A primary alkyl halide is formed. A secondary carbocation is formed as an intermediate. 0/ A secondary carbocation is intermediate.. You selected orrect Question 5 Which possible combinations of Grignard reagent and carbonyl compound could be used for the synthesis of 2,3-dimethyl-1-butanol? 3-methyl-2-butyl Grignard with formaldehyde 3-methyl-2-butyl Grignard with ethanal 3-methyl-2-butyl Grignard with acetone 0/1 pts All of these

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The correct statement about the product formed in the Grignard reagent reaction is: "A secondary alkyl halide is formed."

Regarding the possible combinations of Grignard reagent and carbonyl compound for the synthesis of 2,3-dimethyl-1-butanol, all of the options provided could be used:

3-methyl-2-butyl Grignard with formaldehyde

3-methyl-2-butyl Grignard with ethanal

3-methyl-2-butyl Grignard with acetone

All of these combinations can undergo a nucleophilic addition reaction between the Grignard reagent and the carbonyl compound, resulting in the formation of 2,3-dimethyl-1-butanol.

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If the freezing point of your solution had been incorrectly read 1.0°C lower than the true freezing point (the freezing point of pure water was read correctly, however), would the calculated molar mass of the solute to too high or too low? Explain your answer.

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If the freezing point of the solution is incorrectly read as 1.0°C lower than the true freezing point, the calculated molar mass of the solute would be too high.

The freezing point depression is a colligative property that depends on the concentration of solute particles in a solution. According to the freezing point depression equation:

ΔT = Kf * m

where ΔT is the change in freezing point, Kf is the cryoscopic constant (a property of the solvent), and m is the molality of the solute.

When the freezing point is incorrectly read as lower than the true freezing point, it means that the observed value of ΔT is smaller than it should be. This implies that the calculated molality (m) of the solute will be underestimated because the observed ΔT value is smaller than the actual ΔT value.

Since the molality is inversely proportional to the molar mass of the solute, an underestimated molality will result in an overestimated molar mass. Therefore, the calculated molar mass of the solute will be too high due to the error in reading the freezing point.

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The following types of samples can be analysed using GC EXCEPT A. thermally stable organic components. B. volatile organic components. C. thermally stable inorganic components. D. low molecular weight gaseous species.

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The type of sample that cannot be analyzed using GC is thermally stable inorganic components.

Gas chromatography (GC) is a technique primarily used for the separation and analysis of volatile organic compounds (VOCs) and low molecular weight gaseous species. It is not suitable for the analysis of thermally stable inorganic components, as they typically have higher boiling points and are less volatile compared to organic compounds. GC relies on the vaporization of the analytes and their interaction with a stationary phase, which is better suited for organic compounds with lower molecular weights and higher volatility.

Hence, the correct option is option c

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For the reaction shown, calculate how many grams of oxygen form when each quantity of reactant completely reacts. 2HgO(s)→2Hg(l)+O2(g)
1. 2.10 gHgO
2. 6.23 gHgO
3. 1.32 kgHgO
4. 3.93 mgHgO

Answers

The number of grams of oxygen formed when each quantity of reactant completely reacts is as follows:

1. For 2.10 g of HgO, the amount of oxygen formed can be calculated using the molar mass of HgO and the stoichiometry of the reaction.

2. For 6.23 g of HgO, the amount of oxygen formed can be calculated using the molar mass of HgO and the stoichiometry of the reaction.

3. For 1.32 kg of HgO, the amount of oxygen formed can be calculated using the molar mass of HgO and the stoichiometry of the reaction.

4. For 3.93 mg of HgO, the amount of oxygen formed can be calculated using the molar mass of HgO and the stoichiometry of the reaction.

The balanced equation for the reaction is 2HgO(s) → 2Hg(l) + O₂(g), which indicates that 2 moles of HgO produce 1 mole of O₂.

To calculate the number of grams of oxygen formed, we need to use the molar mass of HgO and convert the given quantities to moles of HgO. Then, based on the stoichiometry of the reaction, we can determine the corresponding moles of O₂ and convert it back to grams.

1. For 2.10 g of HgO:

- Convert grams of HgO to moles using its molar mass.

- Use the stoichiometry to determine the moles of O₂ produced.

- Convert moles of O₂ to grams using the molar mass of O₂.

2. Repeat the same calculation for 6.23 g of HgO.

3. For 1.32 kg of HgO:

- Convert kilograms of HgO to grams.

- Convert grams of HgO to moles using its molar mass.

- Use the stoichiometry to determine the moles of O₂ produced.

- Convert moles of O₂ to grams using the molar mass of O₂.

4. For 3.93 mg of HgO:

- Convert milligrams of HgO to grams.

- Convert grams of HgO to moles using its molar mass.

- Use the stoichiometry to determine the moles of O₂ produced.

- Convert moles of O₂ to grams using the molar mass of O₂.

Performing these calculations for each given quantity of Hgo will give the respective masses of oxygen formed.

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How do you make 102% of water, 96% acetonitrile, and 2% acetic acid in 1Liter or 2 Liters. SOP says make 102:96:2 mobile phase.
Also, do you know why my retention peaks coming out at 2:44 mins and not like it supposed to come out at 5.4 mins. This is for Agilent 11series. Everything is good except retention times, that's why I thought I made my mobile phase above wrong.

Answers

It is not possible to have a percentage greater than 100%. The retention time discrepancy you mentioned is likely not related to the mobile phase composition but may be due to other factors.

Creating a mobile phase with a total composition of more than 100% is not physically possible. The sum of the percentages of individual components in a mixture cannot exceed 100%. If your SOP mentions a 102:96:2 ratio, it may refer to a relative proportion rather than actual percentages. In that case, you would need to adjust the volumes of water, acetonitrile, and acetic acid accordingly to achieve the desired ratio. The retention time discrepancy you're experiencing is unlikely to be caused by the mobile phase composition. Retention times are influenced by various factors, including column type, temperature, flow rate, instrument settings, and sample properties. It is essential to ensure that your instrument is properly calibrated and the column is in good condition. Additionally, factors like the nature of the analytes and sample preparation techniques can also affect retention times. It would be advisable to review and optimize these parameters to identify the cause of the deviation in retention times.

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A carboxylic acid reacts with itself to form an ether. an amine. an aldehyde. an acid halide. an anhydride.

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When a carboxylic acid reacts with itself, it forms (D) an anhydride. An anhydride is a compound that contains two carboxyl groups (-COOH) that are joined together by an oxygen atom. The reaction between two carboxylic acids to form an anhydride is called a condensation reaction.

The general equation for the condensation reaction between two carboxylic acids is:

R-COOH + R'-COOH -> R-(CO)-O-(CO)-R' + H₂O

In this equation, R and R' represent any alkyl group. For example, if the carboxylic acids are acetic acid (CH₃COOH) and propionic acid (CH₃CHCOOH), then the product of the condensation reaction would be acetic anhydride (CH₃CO)₂O.

Anhydrides are important compounds in organic chemistry. They can be used to synthesize other compounds, such as esters and amides. They can also be used as reagents in chemical reactions.

Therefore, (D) an anhydride is the correct answer.

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SECTION B (20 MARKS) 1. (a) Several acids are listed below with their respective equilibrium constants. Ka 7.2 x 10-4 Ka 1.3 × 10-13 Ka 1.8 x 10-5 HF (aq) → H*(aq) + F(aq) HS (aq) → H(aq) + S² (HOAC(aq) → H*(aq) + OAC (aq) (i) Which is the strongest acid? Which is the weakest? (ii) What is the conjugate base of the acid HF? (iii) Which acid has the weakest conjugate base? (iv) Which acid has the strongest conjugate base? = = =

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(i) HF is the strongest acid, and HS- is the weakest acid.(ii) F- is the conjugate base of HF. A conjugate base is the species formed when an acid loses a proton.(iii) HS- has the weakest conjugate base since S2- is a stronger base than F-.

Acids are the species that donate a proton (H+), whereas bases are the species that receive a proton. The strength of an acid is determined by the degree to which it donates protons, whereas the strength of a base is determined by the degree to which it receives protons.(a) HF is the strongest acid, while HOAc is the weakest acid. The reason is that Ka of HF is higher than the others; therefore, it's the strongest acid. 1.3 × 10-13 is the smallest Ka value, and it belongs to HS-. As a result, HS- is the weakest acid.(i) HF is the strongest acid, and HS- is the weakest acid.(ii) F- is the conjugate base of HF.

A conjugate base is the species formed when an acid loses a proton.(iii) HS- has the weakest conjugate base since S2- is a stronger base than F-. A stronger acid has a weaker conjugate base. As a result, the stronger the acid, the weaker its conjugate base.(iv) F- has the strongest conjugate base since HF is the strongest acid, and its conjugate base (F-) must be the weakest.

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3. in utah, there is a large body of water known as the great salt lake. even during cold winters the water does not freeze over. why not? the salt in the water raises the freezing point. the salt in the water changes the polarity of the water. the salt in the water lowers the freezing point. the salt in the water affects the hydrogen bonding.

Answers

"Salt lowers water's freezing point" is correct. Utah's Great Salt Lake never freezes because of its high salt content. Salt dissolves in water, reducing its freezing point. The correct answer is option c.

Salt ions prevent water from freezing. Salt's freezing point depression keeps Great Salt Lake water liquid at cold conditions.

The Great Salt Lake in Utah doesn't freeze in winter because salt lowers the freezing point. The freezing point of pure water is 0 degrees Celsius (32 degrees Fahrenheit), however when salt is dissolved in water, it disturbs ice crystal formation and prevents freezing. Sodium ions (Na+) and chloride ions (Cl-) make up salt. When salt dissolves in water, these ions separate and surround water molecules. This is hydration.

Water molecules' hydrogen bonding is affected by salt. Hydrogen bonding links water molecules to produce ice crystals. The hydrogen bonding network is disrupted by salt, making it harder to create ice crystals. Because of this, the Great Salt Lake stays liquid even in cold winters. The Great Salt Lake's salt lowers the freezing point through influencing hydrogen bonding between water molecules.

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2. A solution is formed by combining \( 10 \mathrm{~mL} \) of solution A and \( 40 \mathrm{~mL} \) of solution B. Find out the heat of reaction by assuming that no heat is lost to the calorimeter, if

Answers

The heat of reaction is:

[tex]−523.0(��−25.0) J/mol−523.0(T f​ −25.0) J/mol.[/tex]

We can then use the following formula to find the heat of reaction:

[tex]Δ�=−��ΔH=− nq[/tex]

where:

[tex]Δ�[/tex]

ΔH = heat of reaction

q = heat absorbed or released

n = number of moles of limiting reagent

In this case, we don't know the identity of the reagents and their concentrations, so we will assume that both solutions are aqueous and that they undergo a neutralization reaction. Therefore, we can use the following equation to determine the number of moles of acid or base in the solution:

[tex]����=����M A​ V A​ =M B​ V B​[/tex]

where:

M is the molarity (concentration) of the solution

V is the volume of the solution

Subscripts A and B denote the two solutions

We can then use the moles of the limiting reagent and their coefficients in the balanced chemical equation to determine the heat of reaction. However, since we don't have a chemical equation, we will assume that the heat of reaction is equal to the heat absorbed by the solution. Therefore, we can use the following formula:

[tex]�=���Δ�q=mC p​ ΔT[/tex]

where:

q = heat absorbed

m = mass of the solution

Cp = specific heat capacity of the solution

ΔT = change in temperature

We don't know the mass of the solution, but we can assume that its density is similar to that of water (1.00 g/mL). Therefore, the mass of the solution is:

[tex]�=�×�=50 mL×1.00 g/mL=50 gm=V×ρ=50 mL×1.00 g/mL=50 g[/tex]

We also know that the specific heat capacity of water is

4.184

[tex][tex]J/g∘C4.184 J/g ∘[/tex] C.[/tex]

C is the initial temperature and

[tex]��T f[/tex]

 is the final temperature of the solution.

Therefore, we can assume that the limiting reagent is solution A, and that it reacts with solution B according to the following equation:

[tex]�+�→��+heatA+B→AB+heat[/tex]

We don't know the heat of reaction, but we can assume that it is equal to the heat absorbed by the solution.

Therefore, the heat of reaction is

[tex]−523.0(��−25.0) J/mol−523.0(T f​ −25.0) J/mol.[/tex]

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. Ammonia can be generated by heating together the solids NH4Cl and Ca(OH)2. Other products of the reaction include CaCl2 and H2O. Initially a mixture of 33.0 g each of NH4Cl and Ca(OH)2 was heated.
a. If the calculated percent yield was 98.27%, what is the experimental mass of the ammonia obtained?

Answers

The experimental mass of ammonia obtained is 20.63 g.

Here is the step-by-step solution to the problem you posted: Ammonia is generated by heating together the solids NH4Cl and Ca(OH)2, with other products such as CaCl2 and H2O. Initially, a mixture of 33.0 g of each solid was heated. Let's assume that the calculated percent yield was 98.27%, and we need to calculate the experimental mass of ammonia produced. To find the experimental mass of ammonia produced, we will use the following steps:Step 1: Find the theoretical yield of ammonia producedTheoretical yield is the maximum amount of product that could be obtained from a reaction. The balanced equation for the reaction between NH4Cl and Ca(OH)2 to form NH3, CaCl2, and H2O is:NH4Cl + Ca(OH)2 → CaCl2 + 2H2O + 2NH3From the balanced equation, we can see that 1 mole of NH4Cl reacts with 1 mole of Ca(OH)2 to produce 2 moles of NH3. Therefore, the number of moles of NH3 produced would be:2 × moles of NH4Cl used in the reactionSince we started with 33.0 g of NH4Cl and its molar mass is 53.49 g/mol, the number of moles of NH4Cl used would be:33.0 g ÷ 53.49 g/mol = 0.6171 mol.

Accordingly, the theoretical yield of ammonia produced would be:2 × 0.6171 mol = 1.2342 molTo find the theoretical mass of ammonia produced, we multiply the number of moles by its molar mass:Molar mass of NH3 = 17.03 g/molTheoretical mass of NH3 = 1.2342 mol × 17.03 g/mol

= 21.00 gTherefore, the theoretical yield of ammonia produced is 21.00 g.Step 2: Find the experimental yield of ammonia producedWe are given that the calculated percent yield was 98.27%. We can use this to find the experimental yield of ammonia produced.Experiment yield = % Yield × Theoretical yield/100Experiment yield

= 98.27% × 21.00 gExperiment yield

= 20.63 gTherefore, the experimental yield of ammonia produced is 20.63 g.Step 3: Calculate the experimental mass of ammonia producedThe experimental mass of ammonia produced is the same as the experimental yield of ammonia produced, which is 20.63 g. Therefore, the experimental mass of ammonia obtained is 20.63 g.

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which of the following ranks these 5 items from smallest to largest?group of answer choicesmolecule, proton, atom, cell, catmolecule, atom, proton, cat, cellproton, molecule, atom, cell, catatom, proton, molecule, cell, catproton, atom, molecule, cell, cat

Answers

The correct ranking of these items from smallest to largest is as follows:

Proton

Atom

Molecule

Cell

Cat

One of the three fundamental components, along with neutrons and electrons, that make up an atom is the proton. Smaller than atoms, molecules, cells, and cats, protons are subatomic particles.

The fundamental building block of matter is an atom. It consists of an orbiting nucleus with protons and neutrons as well as electrons. Atoms are smaller than molecules, organisms, and cats yet bigger than protons.

A molecule is created when two or more atoms join forces. Both simple and complicated molecules exist, such as hydrogen gas (H₂) and DNA. Although smaller than cells and cats, molecules are bigger than atoms.

The fundamental structural and operational unit of all living things is the cell. Cells can be tiny or plainly apparent. Although tiny than cats, they are bigger than molecules.

The multicellular organism known as a cat is a member of the animal kingdom. Cats are far bigger than protons, atoms, molecules, and cells.

As a result, "Proton, Atom, Molecule, Cell, Cat" (proton, atom, molecule, cell, cat) is the proper ranking.

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Carbon dioxide and water react to form methane and oxygen, like this: \[ \mathrm{CO}_{2}(g)+2 \mathrm{H}_{2} \mathrm{O}(g) \rightarrow \mathrm{CH}_{4}(g)+2 \mathrm{O}_{2}(g) \] The reaction is endothe

Answers

The balanced equation for the reaction between carbon dioxide and water to form methane and oxygen is: CO₂(g) + 2H₂O(g) → CH₄(g) + 2O₂(g)

In this reaction, one molecule of carbon dioxide (CO₂) reacts with two molecules of water (H₂O) to produce one molecule of methane (CH₄) and two molecules of oxygen (O₂). The coefficients in front of the reactants and products indicate the relative amounts of each substance involved in the reaction.

The reaction is endothermic, meaning it requires the input of energy to proceed. It can be considered as a combination reaction, where two or more substances combine to form a single product. In this case, carbon dioxide and water combine to produce methane and oxygen. The balanced equation ensures that the number of atoms of each element is the same on both sides of the equation, satisfying the law of conservation of mass.

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How many grams of Vanadium are in 3.930×10 ^24
atoms of Vanadium?

Answers

To calculate the number of grams of vanadium, you need to know the molar mass of vanadium. From this, there are approximately 332 grams of vanadium in 3.930×10²⁴ atoms of vanadium.

Given to us is

Number of atoms of vanadium = 3.930×10²⁴ atoms

The molar mass of vanadium (V) is approximately 50.94 g/mol.

To convert the number of atoms to grams, you can use Avogadro's number (6.022×10²³ atoms/mol) as a conversion factor.

First, calculate the number of moles of vanadium:

Moles of vanadium = Number of atoms / Avogadro's number

Moles of vanadium = (3.930×10²⁴ atoms) / (6.022×10²³ atoms/mol)

Moles of vanadium ≈ 6.52 moles

Now, use the molar mass to convert moles to grams:

Mass of vanadium = Moles of vanadium × Molar mass

Mass of vanadium = (6.52 moles) × (50.94 g/mol)

Mass of vanadium ≈ 331.9888 g

Therefore, there are approximately 332 grams of vanadium in 3.930×10²⁴atoms of vanadium.

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The compound Fe(CH3COO)2 is an ionic compound. What are the ions of which it is composed?

Answers

The compound Fe(CH3COO)2 is a coordination compound, rather than an ionic compound. However, it does contain ions. The ions present in the compound are the iron(II) cation (Fe2+) and two acetate anions (CH3COO-).

The acetate anions act as ligands, bonding to the iron(II) cation through coordinate covalent bonds formed between their oxygen atoms and the iron atom.There are different types of chemical bonds such as ionic bond, covalent bond, polar covalent bond, metallic bond, and coordinate covalent bond. An ionic bond is formed between two or more oppositely charged ions. This type of bond occurs between a cation (a positively charged ion) and an anion (a negatively charged ion).

A coordination compound is formed when a central metal ion is bonded to a group of ligands through coordinate covalent bonds. A ligand is a molecule or ion that bonds to a central metal ion.

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Which oil - olive oil or coconut oil - would you expect to have
a higher peroxide value after opening and storage under normal
conditions as you prepare your certificate of analysis? Explain
your answ

Answers

Coconut oil would be expected to have a higher peroxide value after opening and storage under normal conditions compared to olive oil due to its higher susceptibility to oxidation.

The peroxide value is a measure of the amount of peroxides in a substance and is used as an indicator of oxidative rancidity in oils. Higher peroxide values indicate a higher level of oxidation.

In general, olive oil tends to have a lower susceptibility to oxidation compared to coconut oil. This is due to the differences in their fatty acid composition and antioxidant content.

Olive oil is predominantly composed of monounsaturated fatty acids, such as oleic acid, which are relatively more stable and less prone to oxidation. Additionally, olive oil contains natural antioxidants, such as polyphenols, which can help protect against oxidation.

Coconut oil, on the other hand, is rich in saturated fatty acids, which are more susceptible to oxidation. It also has a lower content of natural antioxidants compared to olive oil.

Therefore, based on these factors, it is generally expected that coconut oil would have a higher peroxide value after opening and storage under normal conditions compared to olive oil. However, the specific storage conditions and duration can also play a significant role in the development of oxidation and the resulting peroxide value.

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2. Indicate factors, caused the coagulation of HMW protein solutions: A. Addition of electrolytes solutions to colloidal solutions of HMW compounds; B. Addition of dehydration agents: C. Addition of solvent: D. Addition of other HMWC solution.

Answers

All the stated factors are capable of coagulation of HMW protein solutions and their method is explained below.

A. The addition of electrolytes forms protein aggregates through disruption of ionic bonds. The process is referred to as salting out and leads to further coagulation or precipitation.

B. Dehydrating agents remove the water making the environment hydrophobic. The consequence is exposing of core of proteins which further causes protein protein interaction and coagulation.

C. Solvent with capability to disrupt the protein conformation or stability will lead to coagulation.

D. The other HMWC solution with complementary charges or molecular interactions will contribute to coagulation.

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what is the the incorrect answer? group of answer choices an aqueous solution of ammonium nitrate (nh4no3) is predicted to be acidic. an aqueous solution of sodium acetate (ch3coona)is predicted to be strongly acidic. an aqueous solution of ammonium chloride (nh4cl) is predicted to be acidic. an aqueous solution of sodium sulfate is predicted to be neutral.

Answers

The incorrect answer among the given options is:

An aqueous solution of sodium acetate (CH₃COONa) is predicted to be strongly acidic.

It is really projected that an aqueous solution of sodium acetate will be mildly acidic or slightly alkaline rather than extremely acidic. The conjugate base of the weak acid acetic acid (CH₃COOH) is sodium acetate. In water, sodium acetate dissolves and hydrolyzes to release sodium ions (Na⁺) and acetate ions (CH₃COO⁻). Depending on the concentration of the sodium acetate solution, the presence of acetate ions can slightly raise the pH of the solution, making it either weakly acidic or slightly alkaline. It is not anticipated to be very acidic, though.

The incorrect answer among the given options is:

An aqueous solution of sodium acetate (CH₃COONa) is predicted to be strong acid.

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Use the following reactions for which the reaction enthalpies are given to determine the reaction enthalpy of: [4 marks] N2H4ω+2H2O2(1)→N2(rho)+4H2O(ϱ) Given: N2H4ω)+3O2(e)→2NO2(rho)+2H2O(ϱ)H2O(i)+1/2O2(e)→H2O2ω ΔH∘=−466 kJ H2O(i)+1/2O2(e)→H2O2(ω)1/2 N2(rho)+O2(rho)→NO2(e)H2O(ω)→H2O(rho) ΔH∘=98.0 kJ ΔH∘=34.0 kJ ΔH∘=44.0 kJ

Answers

The reaction enthalpy is X - 546 kJ/mol.

We have the following chemical reactions with their corresponding enthalpies.[tex]N2H4ω)+3O2(e)→2NO2(rho)+2H2O(ϱ)[/tex]

[tex]∆H = X kJ/mol...(1)H2O(i)+1/2O2(e)→H2O2ω ∆H∘[/tex]

[tex]=−466 kJ...(2)H2O(i)+1/2O2(e)→H2O2(ω) ∆H∘[/tex]

[tex]=−466 kJ/2[/tex]

[tex]= -233 kJ/mol...(3)1/2N2(rho)+O2(rho)→NO2(e) ∆H∘[/tex]

[tex]=98.0 kJ...(4)H2O(ω)→H2O(rho) ∆H∘[/tex]

=34.0 kJ...(5) Now to determine the reaction enthalpy for the given reaction:

[tex]N2H4ω+2H2O2(1)→N2(rho)+4H2O(ϱ)[/tex] We will use the following set of reactions: (a) [tex]N2H4ω + O2 → N2O +[/tex] [tex]2H2O[/tex] (reverse of (1) by flipping LHS to RHS and [tex]H2O2 -> H2O[/tex] and dividing through by 2)∆H = -X kJ/mol(b) [tex]1/2N2O(g) + 1/2O2(g) -> NO2(g)[/tex] (reverse of (4) by flipping LHS to RHS)∆H = -98 kJ/mol(c) [tex]2H2O2 -> 2H2O + O2[/tex] (double the eqn. of (2) by multiplying each enthalpy by 2) ∆H = -932 kJ/mol(d) H2O -> H2O (same as (5))∆H

= 34 kJ/mol Now we can add the three enthalpies (flipping (a) since it's reversed):

[tex]∆H = (-∆H1) + (∆H2) + (∆H3)[/tex]

[tex]= (X) + (-98) + (-932/2) + (34)[/tex]

= X - 546 Therefore the reaction enthalpy of [tex]N2H4ω+2H2O2(1)→N2(rho)+4H2O(ϱ)[/tex] is X - 546 kJ/mol.

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A strip of metal was immersed in a solution of aluminum sulfate. No apparent reaction
was observed. It has then immersed in a solution of tin (II) nitrate and became coated
with tin. The metal is:

(a) less active than tin but more active than aluminum

(b) both tin and aluminum are equally reactive

(c) both tin and aluminum are not reactive

(d) less active than aluminum but more active than tin

Answers

The metal is (b) less active than aluminum but more active than tin

What is the activity of metals?

The metal strip has a greater activity than aluminum but a lower activity than tin. This is due to the fact that the metal strip developed a tin coating after being submerged in a tin (II) nitrate solution, which shows that tin ions in the solution were reduced and deposited onto the metal surface. The metal strip may be more reactive than tin, according to this.

However, there was no discernible reaction when the metal strip was submerged in an aluminum sulfate solution. This suggests that the metal strip is less reactive than aluminum because aluminum ions in the solution were not reduced or deposited onto it.

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Two structures of fructose exist in equilibrium as shown below. The cyclic structure predominates in aqueous solution. (i) Numbering the carbon atoms in the cyclic structure. (ii) What is the function

Answers

(i) Numbering the carbon atoms in the cyclic structure: In the cyclic structure of fructose, the carbon atoms are numbered starting from the carbonyl carbon (C1) and proceeding in a clockwise direction.

(ii) Function: Fructose is a monosaccharide and functions as a source of energy in biological systems. It is commonly found in fruits, honey, and sweeteners and serves as a vital carbohydrate for various metabolic processes in the body.

(i) Numbering the carbon atoms in the cyclic structure: Fructose can exist in a linear form as well as a cyclic form due to the reaction between the carbonyl group (C=O) and one of the hydroxyl groups. In the cyclic structure, the carbon atoms are numbered starting from the carbonyl carbon (C1), which is the anomeric carbon. The other carbon atoms are numbered in a clockwise direction, with C2 being adjacent to C1, followed by C3, C4, C5, and C6.

(ii) Function: Fructose is a simple sugar and serves as an important energy source in biological systems. It is metabolized by enzymes in the body to produce ATP (adenosine triphosphate), which is the primary energy currency of cells. Fructose is readily absorbed into the bloodstream and transported to various tissues where it can be used as a fuel source for cellular respiration.

It plays a crucial role in providing energy for physiological processes, including muscle contraction, nerve function, and synthesis of biomolecules. Additionally, fructose is a key component of many carbohydrates found in fruits, vegetables, and sweeteners, contributing to their sweet taste.

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7. Describe the effect of cach of the following on the rate of the reaction of magnesium metal with a solution of hydrochloric acid: (a) increase the molarity of the hydrochloric acid (b) increase the temperature of the solution.

Answers

Increasing the molarity of the hydrochloric acid and increasing the temperature of the solution both have a positive effect on the rate of the reaction between magnesium metal and hydrochloric acid. These factors enhance the collision frequency and the energy of collisions, leading to an overall increase in the reaction rate.

(a) Increasing the molarity of the hydrochloric acid:

Increasing the molarity of the hydrochloric acid will increase the concentration of hydrogen ions (H⁺) in the solution. As a result, there will be more collisions between magnesium metal and hydrogen ions, leading to an increase in the frequency of successful collisions. This increase in collision frequency will generally result in an increase in the rate of the reaction between magnesium and hydrochloric acid.

(b) Increasing the temperature of the solution:

Increasing the temperature of the solution will increase the kinetic energy of the particles, including the magnesium metal and the hydrogen ions. The increased kinetic energy leads to more frequent and energetic collisions between the reactant particles.

Consequently, the activation energy required for the reaction to occur is more likely to be surpassed, resulting in an increased rate of reaction between magnesium and hydrochloric acid.

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When hydrogen and nitrogen combine to form ammonia, 6 grams of hydrogen react with 20 grams of nitrogen to form 34 grams of ammonia # 12 grams of tydrogen read with 66 grams of bogen predet how many grams of ammonia you would expect to form O 08 grams O O 12 grams 34 grama

Answers

The expected mass of ammonia formed when 12 grams of hydrogen react with 80.138 grams of nitrogen is 68 grams.

To determine the expected mass of ammonia formed, we need to determine the limiting reactant between hydrogen (H₂) and nitrogen (N₂). The limiting reactant is the one that is completely consumed and determines the maximum amount of product that can be formed.

First, we need to calculate the number of moles for each reactant. The molar mass of hydrogen is 2 grams/mol, so 12 grams of hydrogen is equal to 6 moles (12 g / 2 g/mol). Similarly, the molar mass of nitrogen is 28 grams/mol, so 66 grams of nitrogen is equal to 2.357 moles (66 g / 28 g/mol).

Next, we compare the mole ratio between hydrogen and nitrogen in the balanced chemical equation for the formation of ammonia (NH₃). The balanced equation is:

N₂ + 3H₂ → 2NH₃

From the equation, we can see that 1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.

Since we have 6 moles of hydrogen and 2.357 moles of nitrogen, we can calculate the maximum moles of ammonia that can be formed by dividing the moles of nitrogen by the stoichiometric coefficient of nitrogen (1 mole of nitrogen reacts with 2 moles of ammonia).

Maximum moles of ammonia = (2.357 moles of nitrogen) / (1 mole of nitrogen / 2 moles of ammonia) = 4.714 moles of ammonia.

Finally, we can calculate the mass of ammonia using the molar mass of ammonia, which is 17 grams/mol:

Mass of ammonia = (4.714 moles of ammonia) * (17 g/mol) = 80.138 grams.

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Why is it necessary to investigate the dynamics of an isothermal liquid storage processe? O a. To une te model in controlling the temperature of the efficient liquid from the process To use the model ingredieting whether the process tank would overflow or run dry with changes in the inlet and outlet flow rates o to the model in controlling the composition at aliquid product resulting from mixing two or more intet antams OcTo use the model in controlling the composition of a liquid product resulting from mixing two or more inlet streams

Answers

The correct answer is Oa. To use the model in controlling the temperature of the efficient liquid from the process.

Investigating the dynamics of an isothermal liquid storage process is necessary to control the temperature of the liquid efficiently. Understanding the dynamics helps in predicting and controlling the temperature changes within the storage tank.

By studying the dynamics, engineers can develop mathematical models that describe how the temperature of the liquid in the tank changes over time. These models take into account factors such as heat transfer, insulation properties, ambient conditions, and the behavior of the liquid itself.

With a well-developed model, it becomes possible to implement temperature control strategies. This includes adjusting heating or cooling mechanisms, insulation, or flow rates to maintain the desired temperature within the storage tank. By effectively controlling the temperature, the quality and stability of the liquid product can be ensured, preventing issues such as overheating, freezing, or degradation.

While other factors like overflow, dry running, and composition control may also be important in certain scenarios, the given question specifically asks about the dynamics of an isothermal liquid storage process, indicating that temperature control is the primary focus.

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Molecular Iodine, I2 (g), dissociates into iodine atoms at 625 K
with a firs-order rate constant of 0.271 s -1
Part A) What is the half-life for this reaction?
Part B) If you start with 0.035 M of I2

Answers

A) The half-life for this reaction is 2.56 seconds. B) The concentration of I2 after 10 seconds is 0.00798 M.

Part A) To determine the half-life for a first-order reaction, we can use the following formula:

t1/2 = ln(2) / k

where t1/2 is the half-life and k is the rate constant.

In this case, the rate constant is given as 0.271 s^(-1). Let's substitute the value into the formula:

t1/2 = ln(2) / 0.271 s^(-1)

Calculating this expression gives us the half-life for the reaction.

Part B) If we start with an initial concentration of 0.035 M of I2, we can use the first-order rate equation to determine the concentration of I2 at a given time (t):

[I2] = [I2]0 * e^(-kt)

where [I2] is the concentration of I2 at time t, [I2]0 is the initial concentration of I2, k is the rate constant, and e is the base of the natural logarithm.

Let's assume we want to find the time it takes for the concentration of I2 to decrease to half its initial value (0.0175 M).

0.0175 M = 0.035 M * e^(-0.271 s^(-1) * t)

Now we can solve this equation for t. Divide both sides by 0.035 M and take the natural logarithm of both sides to isolate t:

ln(0.0175 M / 0.035 M) = -0.271 s^(-1) * t

Solving for t gives us the time required for the concentration of I2 to decrease to half its initial value.

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If the pH of an acid solution at 25oC is 4.32, what
is the pOH; AND the [H1+],
[OH1-] in mol/L? Answer for all 3 using
formulas, please. Thank you.

Answers

The pOH of the solution is 9.68, [H⁺] is 10^(-4.32) M, and [OH⁻] is 10^(-9.68) M.

pOH is defined as the negative logarithm (base 10) of the hydroxide ion concentration [OH⁻] in mol/L.

Given that the pH of the solution is 4.32, we can calculate the pOH as follows:

pH + pOH = 14

pOH = 14 - 4.32

pOH = 9.68

To find the concentration of H⁺ ions ([H⁺]) in mol/L, we use the formula:

[H⁺] = 10^(-pH)

[H⁺] = 10^(-4.32)

To find the concentration of OH⁻ ions ([OH⁻]) in mol/L, we use the formula:

[OH⁻] = 10^(-pOH)

[OH⁻] = 10^(-9.68)

Thus, the pOH of the solution is 9.68, [H⁺] is 10^(-4.32) M, and [OH⁻] is 10^(-9.68) M.

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INrite a balanced chemical equation describing the reaction of zinc and hydrochloric acid and then write a second equation describing the degradation of hydrogen peroxide.

Answers

The balanced chemical equation for the reaction of zinc and hydrochloric acid is: Zn + 2HCl -> [tex]ZnCl_{2}[/tex] + [tex]H_{2}[/tex]. The degradation of hydrogen peroxide can be represented by the following balanced chemical equation:

2[tex]H_{2}O_{2}[/tex] -> 2[tex]H_{2}O[/tex] + [tex]O_{2}[/tex]

In this equation, zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride ([tex]ZnCl_{2}[/tex]) and hydrogen gas ([tex]H_{2}[/tex]). The number 2 in front of HCl indicates that two molecules of hydrochloric acid are needed to react with one molecule of zinc.

The degradation of hydrogen peroxide can be represented by the following balanced chemical equation:

2[tex]H_{2}O_{2}[/tex] -> 2[tex]H_{2}O[/tex] + [tex]O_{2}[/tex]

In this equation, hydrogen peroxide [tex]H_{2}O_{2}[/tex]) breaks down into water ([tex]H_{2}O[/tex]) and oxygen gas ([tex]O_{2}[/tex]). The number 2 in front of [tex]H_{2}O_{2}[/tex] indicates that two molecules of hydrogen peroxide decompose to form two molecules of water and one molecule of oxygen gas.

These equations illustrate the chemical reactions and the balanced stoichiometry between the reactants and products involved.

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1. What mass spectrometry values would you expect the molecular ion of CH2Cl2 to have, and in what ratios?
2.There are a lot of interesting organic compounds that contain tin, Sn. What is interesting about tin from the point of view of mass spectrometry?
3. Many aromatic compounds, when subjected to electron impact mass spectroscopy, give a cationic fragment with an m/e of 91 atomic mass units. What is the structure of this cation?
4. If you are doing electron impact mass spectrometry and you see an ion with an m/e of a half-integer value, say 101.5, how might you explain this fact?

Answers

1. The molecular ion of CH₂Cl₂ is expected to have mass-to-charge ratios (m/z) of 85 and 87.

2. Tin (Sn) is interesting in mass spectrometry due to its multiple isotopes with significant natural abundances.

3. The cationic fragment with an m/z of 91 in electron impact mass spectroscopy is associated with a phenyl cation (C₆H₅⁺).

4. An ion with an m/z value of a half-integer, such as 101.5, suggests the presence of an odd number of nitrogen (N) atoms in the compound.

1. The molecular ion (M) of CH₂Cl₂ can be derived by subtracting one electron from the neutral molecule, resulting in M+•. This molecular ion will have a mass equal to the sum of the individual atomic masses: 12 (carbon) + 2(1) (hydrogen) + 2(35.5) (chlorine) = 84 amu.

However, the chlorine atoms exist as a mixture of isotopes, with Cl-35 and Cl-37 being the most abundant. As a result, the molecular ion peaks at m/z 85 (M+• with one Cl-35) and m/z 87 (M+• with one Cl-37) will be observed in the mass spectrum in different ratios.

2. Tin has multiple isotopes with significant natural abundances. The most common isotopes are Sn-112, Sn-114, Sn-115, Sn-116, Sn-117, Sn-118, Sn-119, Sn-120, Sn-122, and Sn-124. These isotopes have different masses, resulting in distinct peaks in the mass spectrum of organic compounds containing tin.

By analyzing the relative intensities of these peaks, the isotopic composition of the tin atoms in the compound can be determined, providing important information for compound identification and characterization.

3. In electron impact mass spectrometry, aromatic compounds often undergo fragmentation, leading to the formation of various cationic fragments. The m/z 91 peak corresponds to the loss of a hydrogen atom (H•) from the original molecular ion. In the case of aromatic compounds, the loss of an H• from the phenyl group (C₆H₅) commonly occurs, resulting in the formation of a phenyl cation (C₆H₅⁺) with an m/z value of 91.

4. An ion with an m/z value of a half-integer, such as 101.5, in electron impact mass spectrometry indicates the presence of an odd number of nitrogen (N) atoms in the compound. This phenomenon arises from the isotopic distribution of nitrogen isotopes.

Nitrogen-14 (N-14) is the most abundant isotope and has an atomic mass of 14 amu, while nitrogen-15 (N-15) is less abundant and has an atomic mass of 15 amu. When a compound contains an odd number of nitrogen atoms, the contribution of the N-15 isotope can result in a half-integer m/z value due to the combination of different isotopic masses.

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For the gas phase decomposition of dinitrogen pentoxide at 335 K 2 N₂05 4 NO2 + 02 the average rate of disappearance of N205 over the time period from t = 0 s to t = 104 s is found to be 5.95×10-4

Answers

The calculated change in concentration is approximately 6.188×10^-5 M over the given time period.

To calculate the rate of disappearance in a first order decomposition of N₂O₅ over the given time period, we can use the formula:

Rate = Δ[N₂O₅] / Δt

Given:

Rate = 5.95×10^-4 M/s (disappearance of N₂O₅)

Δt = 104 s

We need to determine the change in concentration of N₂O₅ (Δ[N₂O₅]) over the given time period.

Rate = Δ[N₂O₅] / Δt

Δ[N₂O₅] = Rate × Δt

Δ[N₂O₅] = (5.95×10^-4 M/s) × (104 s)

Now, we can calculate the change in concentration of N₂O₅:

Δ[N₂O₅] = 6.188×10^-5 M

Therefore, over the time period from t = 0 s to t = 104 s, the change in concentration of N₂O₅ is approximately 6.188×10^-5 M.

Please note that we have only calculated the change in concentration of N₂O₅, not the initial or final concentrations.

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helpppppppppppppppppppppppppppppppp

Answers

Answer:

C. they are both polymers

Explanation:

They are a polymer made up of monomers called monosaccharides.

These building blocks are simple sugars, e.g., glucose and fructose. Two monosaccharides connected together makes a disaccharide

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Assume that the air temperature is 20C. during what psychosocial stage do preschoolers come to realize that they are people in their own right, and begin to make decisions to shape the kind of people that they will become?a.initiative-versus-guilt stageb.identity-versus-role-diffusion stagec.industry-versus-inferiority staged.autonomy-versus-shame-and-doubt stage The personnel department of a company wants to know how many workers will be needed each month for the next six-month production period. The following table shows the monthly demand forecast for the six-month period. Month Demand July 1,250 August 1,100 September 950 October 900 November 1,000 December 1,150 The inventory on hand at the end of June was 500 units. The company wants to maintain a minimum inventory of 300 units each month and would like to have 400 units on hand at the end of December. Each unit requires 5 employee-hours to produce, there are 20 working days each month, and each employee works an 8-hours day. The workforce at the end of June was 35 workers. Assume Hiring cost =$500 and Firing cost = $1,000 Determine a minimum inventory production plan (Chase strategy) Determine the total cost for part a Determine the level production plan that meets demand but does not hire or fire workers during the six-month period. Determine the total cost for part c Construct the LP model for the problem and determine the optimal solution using LINDO Show steps by steps in excel, please. WHAT is LEAN MODEL CANVAS?WHY is LEAN MODEL CANVAS is important for any STARTUP ?WHAT is PROBLEM in LEAN MODEL CANVAS? ( 20 points) For the following right triangle, find the side length x. x 6 8 Algorithm: It only needs one stack. We assume it receives the parenthesis one by one. For each received parenthesis, if it is left, push into the stack. If it is right, check the stack: if the stack is empty, it is unbalanced (as in this subsequence, it has more right parentheses than left, which is unbalanced) and returns; if the stack is not empty, pop the top left parenthesis (as it matches with the incoming right parenthesis), and move to the next parenthesis in the sequence.Repeat above process. When there are no more parentheses received, check the stack. If it is empty, it is balanced; otherwise, it is unbalanced (as there are more left parentheses than right parentheses).This has to be done in java 1.What are modern examples of nationalism specific to the United States?Do you think that nationalism creates unity within a country? Why or why not?2.What are examples of international or regional alliances?Do you think that strong alliances will help create a peaceful world? Why or why not?3. In today's society, people are losing confidence in political leaders.Recent polls suggest low approval for American politicians.What do you think are potential solutions for Americans to gain confidence in U.S. politicians? a nurse caring for a client taking chlorpromazine. which findings should the nurse recognize as extrapyramidal symptoms? On a weighted graph, the vertices are labeled with numbers. True False Consider the Hanning filter. This is a weighted moving average. a. Find the variance of the weighted moving average for the Hanning filter. Is this variance smaller than the variance of a simple span-3 moving average with equal weights? a. Many countries are adopting IFRSs although they are not under compulsion to do so. Some are however reluctant to adopt IFRSs. State and explain briefly five (5) factors or reasons that may influenc