This phenomenon is called "reversion", and it occurs when bacteria that are capable of using alternative carbon sources are starved of carbohydrates and begin to use amino acids instead. The resulting production of ammonia can cause an increase in the pH of the medium, leading to false alkaline or pink results.
The medium being referred to in the question is likely to be a microbiological growth medium, which is used to culture and grow microorganisms. In many of these media formulations, carbohydrates are added as a carbon source for the microorganisms.
When the concentration of carbohydrates in the medium is low, certain bacteria that can use amino acids or other nitrogen-containing compounds as a carbon source may produce false positive results after prolonged incubation periods. This is because these bacteria can produce large amounts of ammonia, which can raise the pH of the medium, resulting in the formation of false alkaline or pink results.
To avoid reversion, growth media should be carefully formulated to ensure adequate concentrations of carbohydrates for the target microorganisms, and should be monitored for any changes in pH or color over time.
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what is a correct set of quantum numbers for an electron in the 3p orbital? fill in the blanks with a whole number no decimals n
[tex]\begin{equation}\mathrm{n}=3, \rho=1, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex] is a correct set of quantum numbers for an electron in the 3p orbital, with a whole number no decimals n.
The quantum state of an electron in an atom or molecule is determined by four separate elements known as quantum numbers. With the use of these numbers, it is possible to forecast the energy, location, and orientation of the electrons within an atom. The orbital's size is defined by the electron's principal quantum number, n, which also serves as an energy level indicator. The azimuthal quantum number, l, describes the geometry of the orbital, while the magnetic quantum number, ml, determines its direction in space. An electron's spin is defined by its spin quantum number, or ms. These illustrations are crucial for understanding atomic and molecular properties since they collectively give a full explanation of the electron.
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The actual question is:
Fill in the blanks,
__________________ is a correct set of quantum numbers for an electron in the 3p orbital, with a whole number no decimals n
A) [tex]\begin{equation}\mathrm{n}=3, \rho=1, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
B) [tex]\begin{equation}\mathrm{n}=3, \rho=2, \mathrm{m_e}=-2,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
C) [tex]\begin{equation}\mathrm{n}=2, \rho=2, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
D) [tex]\begin{equation}\mathrm{n}=2, \rho=3, \mathrm{m_e}=-1,0, \mathrm{~m}_{\mathrm{s}}=+1 / 2 \text { or }-1 / 2\end{equation}[/tex]
A proposed mechanism for a reaction is:
C
4
H
9
B
r
Write the rate law expected for this mechanism. What is the overall balanced equation for the reaction? What are the intermediates in the proposed mechanism?
Answer:
The rate law is the equation that describes how the reaction rate depends on the concentrations of the reactants. The rate law for a reaction cannot be determined based solely on the chemical formula of the reactant, as the reaction mechanism, conditions, and other factors can all affect the rate.
The overall balanced equation for the reaction is not provided, so it is not possible to write the rate law or determine the intermediates without additional information. To determine the rate law and intermediates, a detailed study of the reaction conditions, mechanism, and kinetics is necessary.
which of the properties are desirable of a gravimetric analysis precipitate? insoluble easily filterable pure forms a colloidal suspension small particle size
The properties which are desirable of a gravimetric analysis precipitate are:
insoluble, easily filterable, pure and small particle size.
Gravimetric analysis precipitates should be insoluble in the solution from which they were generated. This guarantees that the mass of the precipitate can be determined accurately.
The precipitate should be easily filterable, which means it should form a compact, well-defined layer on the filter paper without passing through the filter paper's pores. This allows for the precipitate to be easily separated from the solution and any contaminants.
The precipitate should be pure, which means it should be free of any contaminants that might impair the gravimetric analysis's accuracy. Any contaminants in the precipitate might contribute to an overestimation of the analyte.
Small particle size is preferred because it increases the surface area of the precipitate, allowing for the thorough elimination of any contaminants that may be present. Also, tiny particles settle faster, which might shorten the time required for the gravimetric analysis's precipitation stage.
A colloidal suspension is undesirable because it implies that the particles are too tiny to settle out of the solution and may be difficult to separate during the filtering process. This might result in insufficient precipitation and erroneous data.
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When heating this reaction mixture at reflux, the reaction temperature will be maintained at approximately. A. 25C B. 65C C.100C D. 125C
The reaction temperature at reflux will typically be lower than 100°C.
The boiling point of the reaction mixture is determined by the vapor pressure of the components present in the reaction mixture. As such, the temperature of the reaction mixture at reflux will depend on the boiling point of the components present in the reaction mixture. Generally, the boiling point of a reaction mixture is lower than the boiling point of its components, so the reaction temperature at reflux will be lower than the boiling point of the components. Therefore, the reaction temperature at reflux will typically be lower than 100°C.
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A 60.00g sample of tetraethyl lead, a gasoline additive, is found to contain 38.43g lead, 17.83g carbon, and 3.74g hydrogen. Find its empirical formula.
In a 60g sample of tetraethyl-lead, a gasoline is addictive, is found to contain 38.43g lead, 17.83g carbon and 3.74g hydrogen, its empirical formula is PbC₆H₂₀.
What is empirical formula ?The term Empirical formula is defined as the chemical formula of a compound that gives the ratios of the elements present in the compound but not the actual numbers or arrangement of atoms.
The percentage mass of Pb = 38.43/60 × 100
= 64.05 %
The percentage mass of C = 17.83/60 × 100
= 29.71%
The percentage mass of H = 3.74/60 × 100
= 6.23%
Now,
Pb → 64.05/207
= 0.3094
C ⇾ 29.71/12
= 2.475
H ⇾ 6.23/1
= 6.23
Therefore, the ratio is as follows:
Pb : C : H = 1 : 8 : 20
Thus, empirical formula is PbC₆H₂₀.
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the attractive force between water molecules that results from hydrogen bonding is called__________
The attractive force between water molecules that results from hydrogen bonding is called hydrogen bonding.
Hydrogen bonding is a type of intermolecular force that arises when hydrogen atoms are covalently bonded to atoms of high electronegativity, such as oxygen, nitrogen, and fluorine. These hydrogen bonds form strong attractions between the molecules, giving water its high surface tension and other unique properties. These hydrogen bonds form strong attractions between the molecules, giving water its unique properties such as high surface tension, high boiling point, and low vapor pressure. Hydrogen bonding is responsible for the stability of many biological molecules such as DNA and proteins, and for the increased solubility of many compounds in water.
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an empty graduated cylinder has a mass of 31.780g. then, 50.0ml of an unknown liquid are added and the mass increases to 72.810g. what is the density of the unknown liquid? your answer should be a number plus unit no space, the unit should be in abbreviated form like shown in the question.
If an empty graduated cylinder has a mass of 31.780g. then, 50.0ml of an unknown liquid are added and the mass increases to 72.810g. then the density of the unknown liquid is 0.8206 g/cc.
We must use the following formula to determine the density of the unidentified liquid:
density equals mass/volume
The mass of the liquid that has been added to the graduated cylinder must first be ascertained. We may achieve this by deducting the mass of the liquid-filled cylinder from the mass of the empty cylinder:
Mass of liquid equals mass of cylinder with liquid minus mass of cylinder with no liquid.
liquid mass = 72.810 g - 31.780 g
liquid mass is 41.030 g.
The volume of the liquid added, which is 50.0 mL, may then be calculated.
We can now enter these values into the density formula as follows:
The formula for density is mass/volume: 41.030 g/50 mL.
Since 1 millilitre (mL) equals 1 cubic centimetre (cc), we can simplify the units by converting to 1 cc:
densities equal 41.030 g per 50.0 cc
We can finally determine the density:
0.8206 g/cc is the density.
As a result, the unknown liquid has a density of 0.8206 g/cc.
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why was it important to ensure that the solute was completely dissolved in the cyclohexane before freezing the solution
It important to ensure that the solute was completely dissolved in the cyclohexane before freezing the solution because it affects the freezing point of the solution.
When a solute dissolves in a solvent, it reduces the solvent's freezing point, which implies the solution must be chilled to a lower temperature than the pure solvent in order to freeze. This is referred to as freezing point depression.
If the solute is not entirely dissolved in the solvent, the resultant solution may have a non-uniform composition, with greater concentrations of solute in certain places than in others. This might cause the freezing point of the solution to be lower than predicted, as well as the production of crystals or other solid particles, which can interfere with the experiment's accuracy.
Furthermore, if the solute is not entirely dissolved, the resultant solution may not be homogenous, and its characteristics may differ from one section of the sample to the next. This might result in inconsistencies and inaccuracies in the experiment.
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Using scanning tunneling microscopy, scientists at IBM wrote the initials of their company with 35 individual xenon atoms. Calculate the total mass of these letters in grams (mXe=131.29amu).
Express your answer using four significant figures.
Scientists at IBM used scanning tunnelling microscopy to write the initials of their corporation using 35 individual xenon atoms. The mass of the xenon atom is 7.631 x 10⁻²¹ g
The concept involved in the given problem is mass conversion. The mass conversion establishes connections between grams, moles and atoms. Mole can be used to relate mass of substance to the number of atoms.
Mole is the chemical unit to express the amount of a substance. One mole consists of Avogadro’s number of atoms that is
6.022 x 10²³ atoms
1 mol = 6.022 x 10²³ atoms
The Avogadro’s number acts as a conversion factor between the number of atoms and the number of moles.
The number of moles of a substance can be calculated using following formula:
Number of moles = Number of atoms divided by Avogadro number
The moles of a substance can be converted to grams of the substance using the following formula:
Grams = Moles x Atomic mass
Step: 1
Calculate the moles of Xe atoms by using the relation as follows:
Number of moles = Number of atoms divided by Avogadro number
Thus,
mol of Xe = number of atoms / Avogadro number
= 35/6.022x10²³
= 5.812 x 10⁻²³ mol
Explanation:
The Avogadro’s number acts as a conversion factor between number of atoms and moles. So, divide the number of atoms by Avogadro’s number to get the moles of Xe atoms.
Hint:
Convert the moles of Xe to grams.
Step: 2
Calculate the total mass of letters from the moles of Xe using the following relation:
Grams of Xe = (Moles of Xe) x (Atomic mass of Xe)
=(5.812 x 10⁻²³ mol) x (131.29 gmol⁻¹)
= 7.631 x 10⁻²¹ g Xe
Mole of a substance relates mass of substance to the number of atoms. Convert the number of atoms to moles of Xe using Avogadro’s number. Then convert moles to grams of Xe atoms by multiplying moles with atomic mass of Xe.
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Which of the traits present in the plant shown here is entirely passed from one generation to the next?
A. the amount of seeds that survive being eaten by herbivores
B. the number of other plants that compete for water
C. the length of the spines that it produces
D. the amount of sunlight it receives
Answer:
The length of the spines that it produces is the trait that is entirely passed from one generation to the next.
Answer:
C. the length of the spines that it produces
What functional groups are common to all α-amino acids?
Check all that apply.
aromatic
amide
carboxylate
alcohol
thiol
protonated amine
The functional groups that are common to all α-amino acids are: Carboxylate group (COO-), Protonated amino group (NH3+)Therefore, the correct options are: Carboxylate Protonated amine
The following functional groups are not common to all α-amino acids:
Aromatic (Some α-amino acids have aromatic side chains, but not all of them have) Amide (Peptide bond formation between amino acids involves the formation of an amide bond, but not all α-amino acids have an amide functional group in their structure) Alcohol (Some α-amino acids have hydroxyl groups in their side chains, but not all of them have) Thiol (Only one α-amino acid, cysteine, has a thiol group in its side chain)
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A single M&M has a mass of 0.89g. If the formula of chocolate is C7H8N4O2, how many molecules are in an M&M?
Answer:
3x10^21molecules
Explanation:
convert 0.89g to a mole by finding the molar mass of C7H8N4O2. Divide 0.89 by 180g(molar mass) then multiply it by 6.02x10^23 and it equals 2.9766x10^21 on the calculator and you round to the nearest sig fig.
vanillin can be recrystallized from water because it is slightly soluble in warm water. which functional group of vanillin is mostly responsible for the slight water solubility? why is vanillin not completely soluble in water?
The functional group of vanillin that is mostly responsible for the slight water solubility is the hydroxyl group (-OH).
Vanillin is not completely soluble in water because it is an organic compound composed of non-polar molecules, which are not able to form hydrogen bonds with water molecules. This means that, even though vanillin is slightly soluble in warm water, it is not completely soluble and can be recrystallized from the water. Vanillin is an organic compound composed of a phenolic group (-C6H5OH) and an aldehyde group (-CHO). The phenolic group is responsible for its characteristic odor, while the aldehyde group is responsible for the slight water solubility of vanillin. The hydroxyl group (-OH) in the phenolic group is mostly responsible for the slight water solubility of vanillin, as it can form hydrogen bonds with water molecules.
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A 214 kg boat is sinking in the ocean. The force of gravity that draws the boat down is partially offset by the buoyant force of the water, so the net unbalanced force on the boat is -1310 N. What is the acceleration of the boat?
Answer:
force divided by massExplanation:
as force is mass multiplied by accelaration so if we divide force by mass we will get accelaration
which set of three quantum numbers does not specify an orbital in the hydrogen atom?
any set of quantum numbers that violate the rules for the allowed values of n, l, and m_l will not specify a valid orbital in the hydrogen atom.
The trio of quantum numbers n = 3, l = 3, and m l = -2 do not identify an orbital in the hydrogen atom.
This is because l = 3 is an invalid quantum number for n = 3, as the value of l cannot be bigger than n-1. When n = 3, the permitted values of l are 0, 1, and 2. As m l has a value between -l and +l, the quantum number m l = -2 is acceptable for l = 2 but not for l = 3.
In summary, any set of quantum numbers that violate the rules for the allowed values of n, l, and m_l will not specify a valid orbital in the hydrogen atom.
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Draw the structure of cis-jasmone, a natural product isolated from jasmine flowers, formed by treatment of alkyne A with H2, in the presence of the Lindlar catalyst. Click the "draw structure" button to launch the drawing utility.
The resulting product is cis-jasmone, which has the following structure:
H
|
CH3-CH-CH=CH-CH=O
|
CHO
The synthesis of cis-jasmone involves the hydrogenation of an alkyne in the presence of a Lindlar catalyst. Specifically, alkyne A is treated with hydrogen gas (H2) and a Lindlar catalyst, which is a type of palladium catalyst that selectively hydrogenates alkynes to cis-alkenes. The reaction conditions prevent complete reduction of the alkyne to an alkane. The molecule has a six-carbon ring with a double bond between carbons 2 and 3 and a carbonyl group (C=O) attached to carbon 6. The two methyl groups attached to carbons 1 and 2 are both on the same side of the ring, giving the molecule a cis configuration.
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fumaric acid is an intermediate metabolite of glucose metabolism. fumaric acid contains 41.392% c, 3.473% h, and 55.135% o by mass. what is the empirical formula for fumaric acid
Fumaric acid is an intermediate metabolite of glucose metabolism. fumaric acid contains 41.392% c, 3.473% h, and 55.135% o by mass.the empirical formula of fumaric acid is C3H4O4.
Determining the Empirical Formula of Fumaric Acid.To determine the empirical formula of fumaric acid, we need to calculate the relative number of atoms of each element present in the compound. We can assume a 100 g sample of fumaric acid, which means we have:
41.392 g of carbon (C)
3.473 g of hydrogen (H)
55.135 g of oxygen (O)
Next, we need to convert these masses to moles by dividing them by the respective atomic/molecular masses:
C: 41.392 g / 12.01 g/mol = 3.446 mol
H: 3.473 g / 1.01 g/mol = 3.441 mol
O: 55.135 g / 16.00 g/mol = 3.446 mol
We can see that the number of moles of each element is approximately the same, so the empirical formula is simply the ratio of the atoms in the compound, which is:
C3H4O4
Therefore, the empirical formula of fumaric acid is C3H4O4
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9) For the following balanced equation, NH3(g) + HCl(g) → NH4Cl(s)
how many moles of the product could be produced by complete reaction of 1.00g of ammonia?
For the equation, 0.059 moles of NH₄Cl can be produced to complete the reaction.
How to calculate moles?In order to determine how many moles of the product, NH₄Cl, can be produced by the complete reaction of 1.00g of ammonia, we can use the balanced chemical equation. According to the equation, 1 mole of NH3 reacts with 1 mole of HCl to produce 1 mole of NH₄Cl.
Thus, if we have 1.00g of NH₃, we can calculate the number of moles by using the molar mass of NH₃:
1.00g NH₃ / 17.0 g/mol = 0.059 moles NH₃
So, if we have 0.059 moles of NH₃, we can produce 0.059 moles of NH₄Cl.
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dissociation of(NH4)2SO4 and hydrolysis
Dissociation of (NH4)2SO4 refers to the process by which ammonium sulfate ionizes in aqueous solution to produce ions.
Hydrolysis, on the other hand, is a chemical reaction in which water reacts with a substance to produce new molecules.
What is the reaction of the dissociation of(NH4)2SO4?Ammonium sulfate is a salt that consists of two ammonium ions (NH4+) and one sulfate ion (SO4^2-). In water, the ionic bonds in ammonium sulfate break apart and the ions become hydrated, meaning they are surrounded by water molecules.
The equation for the dissociation of ammonium sulfate in water is shown below:
(NH4)2SO4 + H2O ⇒ 2NH4+ + SO4^2-
Hydrolysis
In the context of ammonium sulfate, hydrolysis refers to the reaction between the ammonium ion (NH4+) and the hydroxide ion (OH-) to produce a new molecule.
The equation for the hydrolysis of ammonium sulfate in water is shown below:
NH4+ + OH- -> NH3 + H2O
It's important to note that while dissociation and hydrolysis both involve the reaction of a substance with water, they produce different products and have different effects on the substance. Dissociation leads to the formation of ions, while hydrolysis leads to the formation of new molecules.
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i actually have no clue
a kilocalorie of heat is required to raise the temperature of:____.
One kilogramme of water needs one kilocalorie (kcal) of heat to raise its temperature by one degree Celsius (°C). It takes 4.18 kilocalories of heat to raise the temperature of 1 kilogramme of water by 1 degree Celsius.
As a result of a temperature difference, energy can be transferred from one body to another in the form of heat. It is a cornerstone of thermodynamics and is essential to many organic and synthetic processes. Heat is a form of energy that can be transmitted through radiation, conduction, and convection. Heat is created when particles in matter move about. In daily life, we encounter heat in the form of hot drinks, heated spaces, and warmth from the sun. Heat is employed in industry for a number of processes, including manufacturing, power generation, and cooking. Other scientific fields that depend on heat include physics, chemistry, and engineering.
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When 300 grams of water cools from 50. °C to 25°C, the total amount of heat energy released by the water is?
The total amount of heat energy released by the water is 31,350 J.
What is heat capacity?Heat capacity is a physical property of a substance that describes how much heat energy is required to raise the temperature of the substance by a certain amount.
The amount of heat energy released by the water can be calculated using the specific heat capacity of water and the change in temperature:
Q = m × c × ΔT
where Q is the amount of heat energy released, m is the mass of water, c is the specific heat capacity of water, and ΔT is the change in temperature.
For water, the specific heat capacity is approximately 4.18 J/(g°C).
So, plugging in the values:
Q = 300 g × 4.18 J/(g°C) × (50°C - 25°C)
Q = 300 g × 4.18 J/(g°C) × 25°C
Q = 31,350 J
Therefore, the total amount of heat energy released by the water is 31,350 J.
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how many moles of calcium in 0.5 mole ca3(po4)2
There are 1.5 moles of calcium in 0.5 mole Ca3(PO4)2.
How to determine the number of moles of calcium in 0.5 mole Ca3(PO4)2First we need to first find the molar mass of Ca3(PO4)2:
Molar mass of Ca3(PO4)2 = (3 x molar mass of Ca) + (2 x molar mass of PO4)
= (3 x 40.08 g/mol) + (2 x (1 x 30.97 g/mol + 4 x 16.00 g/mol))
= 310.18 g/mol
Next, we can use the following mole ratio:
3 moles of Ca / 1 mole of Ca3(PO4)2
This means that for every 1 mole of Ca3(PO4)2, there are 3 moles of Ca.
Therefore, the number of moles of calcium in 0.5 mole Ca3(PO4)2 is:
0.5 mole Ca3(PO4)2 x (3 moles of Ca / 1 mole of Ca3(PO4)2) = 1.5 moles of Ca
Therefore, there are 1.5 moles of calcium in 0.5 mole Ca3(PO4)2.
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slip is an acid-resistant resin used to make aquatints. true/false
False. Slip is a liquid clay used in ceramics to create molds or to cast objects. It is not related to the making of aquatints, which is a printmaking technique that involves etching a metal plate with acid to create areas of tone.
Aquatint is a technique that allows for the creation of areas of tone in a print, similar to the effects of washes or watercolors. The process involves applying a fine resin powder to a metal plate, which is then heated to create a layer of resin that is acid-resistant. The plate is then etched with acid, which bites into the exposed metal and creates areas of tone. Slip, on the other hand, is used in ceramics to create molds, as it can be poured or brushed onto a surface and dried to a hard, plaster-like consistency.
While slip and aquatint are not related, they are both materials used in creative processes. Slip is essential for the creation of ceramics, while aquatint is a valuable tool for printmakers looking to create tonal effects in their work. Both materials require a level of technical skill and attention to detail in their use, making them challenging but rewarding mediums for artists to work with.
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When solid ammonium chloride is added to water, all of the solid dissolves and the solution becomes cold.
a. True
b. False
True. When solid ammonium chloride is put to water, it dissolves quickly and undergoes an endothermic reaction, meaning that heat from the environment is absorbed, cooling the solution.
A salt with no flavour or scent, ammonium chloride has a number of uses. It is frequently used in fertilisers, as an animal feed addition, and in several medical procedures. Ammonium chloride, often known as NH4Cl, is a chemical compound made up of ammonium ions (NH4+) and chloride ions (Cl-). Water rapidly dissolves ammonium chloride when it is introduced, releasing ammonium and chloride ions into the solution. Because of the endothermic nature of this process, the solution cools down as a result of heat being absorbed from the surroundings. This quality is frequently applied in cooling applications, such as cold packs.
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What is the estimated density of the table tennis ball? Record your answer to the nearest hundredth. G/cm3 What is the estimated density of the golf ball? Record your answer to the nearest hundreth. G/cm3
Answer:
The estimated density of a table tennis ball is around 2.7 g/cm^3. The estimated density of a golf ball is around 1.5 g/cm^3.
Explanation:
calculate the mass percent of a sucrose solution that is made by mixing 3.950 grams of sucrose into water until the solution has a mass of 20.6 grams
The mass percent of the sucrose solution is 19.17%, thus we can calculate it using the formula mass percent = (mass of solute mass of solution) 100%.
We must ascertain the masses of the sucrose and the total solution in order to calculate the mass percent of a sucrose solution. The following formula can be used: (Mass of Solute - Mass of Solution) / 100% = mass percent where the mass of the solution is the sum of the mass of the solute (sucrose) and the mass of the water. We must first calculate the sucrose's mass: Sucrose has a mass of 3.950 g. The total mass of the solution must then be determined: mass of solution = 20.6 g. We may now get the mass percent using the following formula: 19.17% is the mass percentage (3.950 g x 20.6 g) x 100%. The sucrose solution's mass percentage is 19.17% as a result.
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19. 50 cc of N/2 HCl and 10 cc of 2N H₂SO4 solutions are mixed with 0.4 g of NaOH. Calculate the normality of resulting mixture. [0.583N]
The normality of the resulting mixture is 0.583N.
What is the Normality of a mixture?The normality is described as the number of gram or mole equivalents of solute present in one liter of a solution.
How to calculate the normality:
First, let's calculate the number of moles of NaOH in 0.4 g of the compound:
Molar mass of NaOH = 23 + 16 + 1 = 40 g/mol
Number of moles of NaOH = 0.4 g / 40 g/mol = 0.01 mol
Next, we need to calculate the total number of acid equivalents in the mixture of HCl and H₂SO4:
Number of acid equivalents of HCl = (50 cc / 1000) L x (N/2) = 0.025 N LNumber of acid equivalents of H₂SO4 = (10 cc / 1000) L x (2N) = 0.02 N LTotal number of acid equivalents = 0.025 N L + 0.02 N L = 0.045 N LSince NaOH is a strong base and reacts completely with the acid, the number of moles of NaOH is equal to the number of acid equivalents in the mixture.
Therefore, the normality of the resulting mixture is:
Normality = number of acid equivalents / volume of the mixture in liters
Normality = 0.045 N L / ((50 + 10) cc / 1000) L = 0.583 N
So the normality of the resulting mixture is 0.583N.
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if the percentage of oxygen (by mass) in an unknown compound is 35.53% and there are 4 atoms per molecule. what is the molar mass of the unknown compound
Molar mass, which is measured in grammes per mole units, is the mass of one mole of a substance. The unknown compound's molar mass is 226.2 g/mol plus the molar masses of any additional elements it may contain.
We can first calculate the mass of the oxygen in one mole of the chemical to obtain the molar mass of the unknown compound: The chemical has 35.53 g of oxygen per mole. Oxygen has an atomic mass of 16.00 g/mol. As a result, there are 2.2206 moles of oxygen in a mole of the molecule, or 35.53 g / 16.00 g/mol. As there are 4 atoms per molecule, the following formula can be used to determine the molar mass of the unknown compound: Molar mass = (35.53 g + molar mass of other elements) / 2.2206 mol * 4 atoms/molecule. Molar mass = (35.53 g / 2.2206 mol * 4) + molar mass of other elements is the result of solving for the molar mass of the unidentified substance. Molar mass is equal to 226.2 g/mol plus the molar mass of other elements. Therefore, The unknown compound's molar mass is 226.2 g/mol plus the molar masses of any additional elements it may contain.
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Which event will increase the amount of carbon dioxide in the atmosphere?
a. burning fossil fuels
b. increased wind power
c. decreased population
d. decreasing habitats
