Excited electrons that revert to the ground state result in atomic emission spectra.
What is an atomic emission spectra?The pattern of lines created when light goes through a prism to separate it into the various light frequencies it contains is termed as an atomic emission spectrum.Four distinct lines can be seen when light from a hydrogen gas discharge tube is split by a prism. A separate electron transition from a higher energy state to a lower energy state corresponds to each of these spectral lines. Each element's atomic emission spectrum is distinct.To know more about atomic emission spectra visit
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the reaction is the last step in the commercial production of sulfuric acid. the enthalpy change for this reaction is 227 kj. in designing a sulfuric acid plant, is it necessary to provide for heating or cooling of the reaction mixture? explain.
It is necessary to provide cooling for the reaction mixture to prevent sulfuric acid from boiling. Enthalpy is -227 kJ. Heat is also emitted into the environment, and hence exothermic.
Sulfuric acid plants: what are they?Any facility that produces sulfuric acid through the contact process of burning elemental sulphur, alkylation acid, hydrogen sulphide, organic sulphides and mercaptans, or acid sludge is referred to as a sulfuric acid plant.
How does a facility for sulfuric acid operate?The boiler's flue gas is piped into a catalytic reaction vessel. The catalyst converts extra oxygen from combustion air into SO3 in order to oxidise SO2. A condensing tower receives catalytic converter exhaust gases.
What are sulfuric acid's four applications?The production of fertilisers, pigments, dyes, medicines, explosives, detergents, inorganic salts, and acids, as well as petroleum refining and metallurgical operations, all utilise varied amounts of acid.
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Without referring to a data table, rank the following compounds by standard molar entropy.
- N2 (g)
- H2 (g)
- C2H4 (g)
C2H4, N2, and H2 are the right order from most entropy to least entropy.
What is entropy?Entropy is a measureable physical characteristic and a scientific concept that is frequently connected to a state of disorder, randomness, or uncertainty. Entropy is the measurement of the amount of thermal energy per unit of temperature in a system that cannot be used for productive work. Entropy is a measure of a system's molecular disorder or randomness because work is produced by ordered molecular motion. Ice melting is the ideal illustration of entropy. The individual molecules are arranged and fixed as ice. The molecules become disorganized as the ice melts because they are now free to move. The molecules are then liberated to move independently through space as the water is heated to become a gas.
Here,
My justification is that C2H4 will have the most entropy because it has the greatest number of microstates. Then, because something is likely to have more microstates the larger it is, I based N2 and H2 on their weights (which indicate size).
The correct order from most to least entropy is C2H4, N2, and H2.
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Complete the following reaction.
a. CH3 + Br FeBr3
b. OCH + CH3CI AICI3
c. OH + HNO3 H2SO4
d. CF3 + H2SO4 SO3
This allows the Br- ion to attack the CF3, releasing an SO3 molecule and forming a new bond.
What is reaction?Reaction is the act of responding or reacting to something. It can take the form of an emotional response, a physical response, or a mental response. Reactions can be positive or negative, and are often the result of a stimulus, such as a situation or an event. Reactions can be conscious or unconscious, and can be based on past experiences.
CF3 + H2SO4 --> SO3
Explanation: This reaction occurs via an electrophilic substitution. The H2SO4 molecule acts as an acid catalyst and protonates the CF3 molecule, making it more electrophilic. This allows the Br- ion to attack the CF3, releasing an SO3 molecule and forming a new bond.
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Can you explain what the boundaries are (6th grade science)
Answer:
Personal boundaries or the act of setting boundaries is a life skill that has been popularized by self help authors and support groups since the mid 1980s. It is the practice of openly communicating and asserting personal values as way to preserve and protect against having them compromised or violated.
What would happen to the pressure of a gas inside is sealed bottle if the bottle was cooled to half its original temperature?
The pressure of a gas inside is sealed bottle if the bottle was cooled to half its original temperature then the pressure would also decrease by half of its original value and the volume remains constant.
What is pressure ?The term pressure is defined as an expression of force exerted on a surface per unit area. If we applied force F on area A , then pressure
P = F / A.
The pressure of a gas inside is sealed bottle if the bottle was cooled to half its original temperature then the pressure would also decrease by half of its original value and the volume remains constant.
Thus, the pressure would also decrease by half of its original value and the volume remains constant.
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an unknown element is determined to have two naturally occurring isotopes. isotope 1 is 64.11% abundant and has a mass of 68.925580 u, and isotope 2 has a mass of 70.9247005 u. determine the atomic mass of the unknown element. express your answer to four significant figures.
an unknown element is determined to have two naturally occurring isotopes. isotope 1 is 64.11% abundant and has a mass of 68.925580 u, and isotope 2 has a mass of 70.9247005 u, the atomic mass of the unknown element is 69.64 u.
What is percentage abundant?The proportion of a given element's all-natural isotopes is known as its percent abundance. An element's relative abundance is its frequency in the environment as compared to all other elements, expressed as a percentage. The quantity of isotopes and their relative abundances are all that are required to determine an element's atomic weight, as was previously said.
Given that,
isotope 1 is 64.11% abundant (X₁)
isotope 2 percentage abundant is (X₂) = (100 - 64.11) = 35.89
Mass of isotope (M₁) = 68.925580 u
Mass of another isotope (M₂) = 70.9247005 u
atomic mass of the unknown element = (M₁ X₁ + M₂ X₂) / 100%
M = (68.925580 × 64.11) + (70.9247005 × 35.89) / 100%
M = 69.64
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no amino acid molecule by itself can speed up or catalyze reactions between other molecules; however, when amino acids are joined together to make a protein with catalytic properties, the new structure (enzymatic protein) can speed up the rate of a specific chemical reaction. what does this illustrate? view available hint(s)for part a no amino acid molecule by itself can speed up or catalyze reactions between other molecules; however, when amino acids are joined together to make a protein with catalytic properties, the new structure (enzymatic protein) can speed up the rate of a specific chemical reaction. what does this illustrate? the complexity/simplicity paradox the summation theory energy flow, processing, and utilization emergent properties polymer duality
Emergent characteristics are those traits that develop when smaller pieces come together even though they do not independently possess any of those traits.
What are amino acids?Amino acids are the building blocks of proteins. Life's essential building blocks are proteins and amino acids. Byproducts of the breakdown or digestion of proteins are amino acids. The human body uses amino acids to make proteins that help with food dissection. The amino group and carboxyl-acid group of the fundamental structure are referred to as "amino acids." There are 21 amino acids in proteins, and each one has a distinct R group or side chain.
What is the role of amino acids?The creation of body protein and other vital nitrogen-containing substances like creatine, peptide hormones, and certain neurotransmitters depends on amino acids. The biological need is for amino acids, even though allowances are portrayed as protein.
Emergent properties are characteristics of a set of things, like atoms, buildings, or insects, that you wouldn't find in any of the parts alone.
Although the amino acids are independent molecules, when they work together to form enzymes, they exhibit qualities that they do not individually. This is a classic illustration of emergent features.
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if the specific gravity of the mixture is 0.781, what are the w/v concentrations of lactic acid, salicylic acid, and trichloroacetic acid in the mixture?
What are the relative w/v concentrations of lactic acid, citric acid, and boric acid if the mixture's specific gravity is 0.781? What are the % weight-to-volume conversions if the mixture's specific gravity is 0.781?
(Density of the solution / Water Density)
density of mixture = (specific gravity of mixed * density of waters) = (0.781 * 1) = 0.781 g/mL density = (mass/volume) specific gravity = 0.781
Lactic acid concentration in the mixture = (mass of latic acid / quantity of mixture) *100 = (4/128.04)100 = 3.12%. Volume of mixture = (mass / density) = (100 /0.781) =128.04 mL.
What level of fluoride ion should be present in drinking water?
Detailed Solution: 1 mg/l
1.50 mg per liter is the proper answer. The World Health Assembly advised that the maximum allowed level of fluoride present in drinking water for a number of nations, including Canada, China, India, Argentina, and the European Union, be 1.5 mg/l. A fluoride level of 1 mg/l is ideal for drinking water.
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The w/v levels of lactic acid, benzoyl peroxide, plus trichloroacetic acid as in combination are 1.56% if the mixture has a specific gravity of 0.781.
What level of fluoride ion should be present in drinking water?1 mg/l 1.50 mg per liter is the proper answer. The World Health Assembly advised that the maximum allowed level of fluoride present in drinking water for a number of nations, including Canada, China, India, Argentina, and the European Union, be 1.5 mg/l. A fluoride level of 1 mg/l is ideal for drinking water.
(Density of solution / Water Density) = Specific Gravity
density of mixture = (specific gravity of mixed * densities of water) = (0.781 * 1) = 0.781 g/mL density = (mass/volume) specific gravity = 0.781
Volume of the mixture = (Mass of Lactic Acid / Volume of the mixture) = (100 /0.781) =128.04 mL w/v Amount of Lactic in the mixture Salicylic acid concentration in the mixture is *100 = (4/128.04)100 = 3.12% w/v = (mass of Salicylic / volume of mixture). Trichloroacetic acid concentration in the combination: *100 =(5/128.04)100 = 3.9% w/v (i.e., (mass of Trichloroacetic acid / volume of mixture) *100 =(2/128.04)100 = 1.56%
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which sentence describes one characteristic of nonmetals? responses nonmetals are often brittle solids. nonmetals are often brittle solids. nonmetals often conduct electricity. nonmetals often conduct electricity. nonmetals are often malleable. nonmetals are often malleable. nonmetals are often ductile. nonmetals are often ductile.
The sentence which describes one characteristic of nonmetals is nonmetals are brittle and ductile in nature.
Non-metals are those which warrant all the metallic attributes. They're good insulators of heat and electricity. They're substantially feasts and occasionally liquid. Some of also are indeed solid at room temperature like Carbon, Sulphur and phosphorus.
Brittleness describes the property of a material that fractures when subordinated to stress but has a little tendency to distort before rupture. Brittle accoutrements are characterized by little distortion, poor capacity to repel impact and vibration of cargo, high compressive strength, and low tensile strength.
A material's capability to suffer significant plastic distortion under tensile stress before rhapsody is called the ductile parcels of the material. The ductile accoutrements are nickel, etc.
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a 600. ml beaker has an inner diameter of 73.0 mm. what is the vertical distance between the 100. ml marks on the side of the beaker? give your answer in cm.
There are 2.15 cm between each 100 mL mark. The formula; is used to determine a cylinder's molarity volume. V = πr^2h.
What is the straightforward meaning of molarity?The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
What in chemistry is molality?The term "total moles of a solute contained in a kilogram of a solvent" is used to describe molality. Molal concentration is another name for molality. It gauges the amount of solute in a solution.
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a sample of sulfur hexafluoride gas (sf6) occupies a volume of 7.600 x 10-1 liters at 5.817 x 101 oc. assuming the pressure is constant, what will the final temperature be (in o c) if the volume is increased to 8.150 liters?
Therefore, if the volume of sulphur hexafluoride is increased to 8.150 litres, the final temperature is 0.106 o C.
what is sulfur hexafluoride gas?The inorganic compound Sulphur hexafluoride, sometimes known as sulphur hexafluoride, has the formula SF6. It is a gas that has no colour, no smell, is not combustible, and is not harmful. Six fluorine atoms are joined to a sulphur atom in the middle of the compound SF 6, which has an octahedral structure. It is a molecule with a high valent. An artificial, odourless gas called SF6 is utilised in the energy sector to maintain the security and dependability of networks. Because it is highly stable, non-toxic, inflammable, and electronegative, it won't combine with other substances that would change how it behaves or how effective it is.
Is SF6 bad for the environment?It is a strong greenhouse gas with a great potential to contribute to global warming, and its concentration in the earth's atmosphere is rising quickly. Under electrical stress, SF6 breaks down during its working cycle, creating hazardous metabolites that represent a health risk to working employees in the event of exposure.
PV = nRT
R is a constant, pressure is assumed to be constant, and moles and n are, of course, constants.
Direct variation is now the only option.
final temperature and volume
V = kT
final temp and volume
v = kt
I believe this concept is known as Charles' law.
V/v = T/t
7.600 x 10-1 × 8.150= 5.817 x 101 / t
0.76×8.150=58.17×t
t = 0.106 o C
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5. Photons are not considered as objects in the traditional sense, as they cannot exist in a
stationary state.
a.True
b. False
Answer:
No
Explanation:
They are also not considered "objects" in the traditional sense, as they cannot exist in a stationary state.
Liquid benzene (C6H6) reacts with gaseous oxygen to form carbon dioxide and liquid water Express your answer as a chemical equation. Identify all of the phases in your answer.
Liquid benzene (C6H6) reacts with gaseous oxygen to form carbon dioxide and liquid water the chemical equation is C6H6(l) + O2(g) → CO2(g) + H2O(l)
In this equation, C6H6 is liquid benzene, O2 is gaseous oxygen, CO2 is gaseous carbon dioxide, and H2O is liquid water.A chemical equation is a symbolic representation of a chemical reaction, showing the reactants, products, and their respective chemical formulas. In a chemical equation, the reactants are listed on the left side of the arrow, while the products are listed on the right side of the arrow. The arrow represents the transformation of reactants into products. For example, in the equation 2H2(g) + O2(g) → 2H2O(g), the reactants are 2 molecules of hydrogen gas (H2) and 1 molecule of oxygen gas (O2), and the product is 2 molecules of water vapor (H2O).
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Classify each of the following substances as an element, a compound, or a mixture.
A) Flourine, F
B) Boron Nitride, BN
C) Iron, Fe
D) Vinegar
E) Hydrogen Peroxide, HOOH
The following substances as an element, a compound, or a mixture.
A) Fluorine = element
B) Boron nitride = compound
C) Iron = element
D) Vinegar = mixture
E) Hydrogen peroxide = compound
The substances as an element , a compound or a mixture is given as :
A) Fluorine = This is an element with the symbol of the F. The atomic number of the Fluorine is 9. The fluorine is place in the halogen groups in the periodic table.
B) Boron nitride = This Boron nitride is a compound. The boron nitride is the crystalline compound.
C) Iron = This is an element with the atomic symbol of Fe . The atomic number of the iron is 26.
D) Vinegar = This is a mixture of the water and the acetic acid.
E) Hydrogen peroxide = This is the chemical compound. The formula of the hydrogen peroxide is H₂O₂.
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the backbone of the dna molecule consists of what molecules?
Backbone of DNA is made of phosphate and sugar residues
What is Phosphate Backbone?DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T).A phosphate backbone is the portion of the DNA double helix that provides structural support to the molecule. DNA consists of two strands that wind around each other like a twisted ladder. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups.It consists of 5-carbon deoxyribose sugars and phosphate groups. These sugars are linked together by a phosphodiester bond, between carbon 4 of their chain, and a CH2 group that is attached to a phosphate ion. They are extremely important in the function of DNA.To learn more about Phosphate Backbone refers to:
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Calculate the concentration of H+ ions in a 0.010 M aqueous solution of sulfuric acid. H2SO4 (aq)<===> H+(aq)+HSO4^-(aq), Ka1=Large. HSO4^-(aq)<====> H^+ (aq)+SO4^-2(aq), Ka2=0.012.
The concentration of H+ ions in a 0.010 M aqueous solution of sulfuric acid is equal to 0.010 M.
In aqueous solution, sulfuric acid (H2SO4) ionizes to form hydrogen ions (H+) and sulfate ions (HSO4-). This is a strong acid, and it is almost completely ionized. The Ka1 for H2SO4 is very large, which means that it is essentially 100% ionized.
The HSO4- ion can also dissociate to form H+ and SO4^-2 but the Ka2 is small. So in this case, it can be considered that the concentration of HSO4- is negligible compared to H+ ions concentration.
Therefore, the concentration of H+ ions in a 0.010 M aqueous solution of sulfuric acid is equal to the concentration of sulfuric acid, which is 0.010 M.
It's important to note that sulfuric acid is a strong acid and it is almost completely dissociated in aqueous solution, so the concentration of H+ ions is equal to the initial concentration of sulfuric acid.
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A coiled coil is a protein structure in which an alpha helix may self-associate into a dimer. One surface of the helix will contain hydrophobic residues that will promote dimerization which the other surface will contain charged or polar residues exposed to the solvent. Which sequence below most likely has the properties of a coiled coil
The sequence that most closely resembles a coiled coil in terms of its qualities is The hydrophobic residues on one surface of the helix will encourage dimerization, while the charged or polar residues on the other surface will be exposed to the solvent.
What do you mean by coil?A coil is one or more turns of current-carrying wire that are used in an electric circuit to create a magnetic field or to provide electrical resistance or inductance. In the latter instance, a coil is also known as a choke coil (see also inductance). A coil, such as a wire wound around an electrical conductor, is essentially what a current coil is. Typically, a soft iron core serves as the conductor while insulated copper wire serves as the coil. It has been noted that the coil begins acting like a magnet when the conductor's coil is carrying current.
What are coils made of?The primary raw materials for coil manufacture have been metal alloys having a track record of patient safety. The main metals used in construction are nitinol, platinum, nickel, iridium, and tungsten, which are typically created as alloys to achieve the best strength.
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kalsi3o8 what is the total contribution of the three si atoms to the sum of oxidation numbers in k-feldspars
The total contribution of the three Si atoms to the sum of oxidation numbers in K-feldspars is 0.
What is oxidation numbers?The oxidation state, also known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its bonds to other atoms were fully ionic. It describes how much an atom has oxidised (lost electrons) in a chemical compound.
This is because Si atoms have an oxidation number of 0 due to their electron configuration. Each atom has the same number of protons (4) as electrons (4), resulting in a neutral charge and an oxidation number of 0.
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bactroban ointment contains 2% mupirocin. how many grams of a polyethylene glycol ointment base must be mixed with the contents of a 44-g tube of the bactroban ointment to prepare one having a concentration of 5mg/g
The components of a 44-g tube must be combined with 132 g of something like a polyethylene glycol active substance.
Describe Polyethylene.The most popular plastic there in world is polyethylene (PE), which belongs to the significant polyolefin resin family. They are created using ethylene catalytic polymerization [11]. It is a viscoelastic polymer made up of numerous long chains that are combined from ethylene-based monomer units.
What is polyethylene used for?The main applications include squeeze bottles, household goods, agricultural mulch, garbage and grocery bags, wire or cable insulator, package film, and trash and retail bags.
44 x 0.02 = 0.88 g
y = no. of g base
5 mg = 5 / 1000
= 1 / 200
0.88 / (y + 44) = 1/200
88 / 100 = (y + 44) / 200
88 = (y + 44) / 2
176 = y + 44
y = 132 g
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how can you determine if an anion will act as a weak base? write a generic equation showing the reaction by which an anion, a-,acts as a weak base.
A- + H2O -> HA + OH-, anion that acts as the nucleophile of a dangerous chemical is pH- neutral, according to the question, anion that is organic compound with the formula of such a weak base is itself a weak base.
With an example, what is weak base?The fundamental elements that are unable to completely oxidise in water are known as weak bases. Ammonia is one substance that is a weak base. When NH3 is dissolved by water, some of it interacts with the water vapor and breaks down into ammonium ion and hydroxide anions.
NaOH: Is it a weak base?NaOH totally separates from water to produce Na+ and OH. Because all of the [OH] in NaOH is in the solution as [OH] that is ready to receive protons, it is regarded as a strong base.
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what quantity of compound 1 must be provided to prepare 100.00 ml of solution with a concentration equal to ki?
Heat made from compound 1 are kinetically controlled, whereas those made from benzaldehyde are not. The fluid concentration for liposomes that vaporize at 20 mL is 0.1 mm.
What alteration to the experimental setup will produce quantifiable heat differences and Estimate K1?What alteration to the experimental setup can produce quantifiable heat variations and Kapp > K1 Dilute each and every solution. Compound 1 should be present at higher concentrations in both titrations.
Which experimental method is used to assess heat exchange quantitatively?Assessment of Heat Flow
Calorimetry is a method that we can employ to gauge how much heat is generated during a chemical and physical process. The quantity of heat that is transported from or to a substance is measured using calorimetry. As a result, the heat.
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A typical amino acid has an amino group, a carboxyl group and a R side chain attached to a carbon and Hydrogen. Which one of these imparts the unique characteristics to an amino acid (which is going to be different in each amino acid)
The R side chain imparts the unique characteristics to an amino acid.
Amino acids are organic compounds that have a characteristic carboxyl group (-COOH) and an amino group (-NH2) as well as an R group. The R group, also known as the side chain, is a unique group of atoms that imparts distinct chemical properties to each amino acid. The R group can be polar or non-polar, acidic or basic, hydrophobic or hydrophilic, and it can also be an aromatic group, a sulfur-containing group or others.
The R group is what makes each amino acid unique, determining its chemical properties and its role in biological processes. For example, the R group of glutamic acid is polar and acidic while the R group of alanine is nonpolar and neutral. The unique properties of the R group determine how the amino acid interacts with other molecules and how it functions in biological systems such as enzymes and proteins.
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How many atoms are in 2.54 L oxygen gas, 02?
Answer: 2.94x10^22 atoms of O2
Explanation:
To determine the number of atoms in a given volume of a gas, you need to know the molar volume of the gas and the number of moles of the gas present.
The molar volume of a gas at standard temperature and pressure (STP) is 24.45 L/mol. At STP, the pressure is 1 atm and the temperature is 0°C (273.15 K).
So, to find the number of moles of a gas present in a container, you can use the Ideal Gas Law: PV = nRT.
Where:
P = pressure (atm)
V = volume (L)
n = number of moles
R = ideal gas constant (0.0821 L·atm/mol·K)
T = temperature (K)
So we can rearrange the formula to find n = PV/RT
n = (2.44 atm * 2.54 L) / (0.0821 L·atm/mol·K * 275 K) = 0.049 moles
To find the number of atoms of O2, we just multiply the number of moles by Avogadro's number which is 6.022x10^23 atoms/mol.
So the number of atoms of O2 in 2.54 L at 2.44 atm and 275 K is:
6.022x10^23 atoms/mol * 0.049 moles = 2.94x10^22 atoms of O2
This is the number of atoms of O2 present in the container.
ercent Yield For the following balanced chemical reaction: 2 Hg O2 -- 2 HgO If you start with 33 grams of Hg and you produce an actual amount of 25 grams HgO in the lab what is the percent yield
The Percent Yield for the following balanced chemical reaction 75.76%.
What exactly is percent yield?Percent yield in chemistry is the percentage of the product's weight to its theoretical yield. In order to quantify the outcome in percent, we divide the experimental yield by the theoretical yield and multiply the result by 100.
Why do we compute percent yield?Because many chemical reactions produce byproducts, not all of the reactants in the equation actually undergo reaction, percent yield is significant. A poor percent yield in product manufacturing would mean that the corporation is wasting resources, including money and reactants.
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in a 1:2 methanol-ethyl acetate mixture, what methyl group integration ratio would you expect for the methyl singlets of methanol and ethyl acetate on 1h nmr? group of answer choices
One method that provides distinctive indications for chemicals is 1H NMR.
What is in ethyl acetate?The acetate ester produced when acetic acid plus ethanol react is known as ethyl acetate. It functions as just a polar aprotic solvent, an inhibitor of EC 3.4.19.3 (pyroglutamyl-peptidase I), a metabolite, and a metabolite produced by Saccharomyces cerevisiae. It is a volatile organic chemical, an ethyl ester, and an acetate ester. A technique of separating methyl alcohol from ethyl acetate is characterised by feeding the mixture of the two substances into an extractive distillation tower from which water is introduced as an extracting agent. The water is then utilised to extract the methyl alcohol and ethyl acetate.
What is methanol solution used for?A transparent liquid molecule called methanol is utilised in countless things we use every day, such as fuels, paints, plastics, and cosmetics. Methanol is a growing form of renewable energy that is used in the electrical, transportation, and marine industries.
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Consider the following unbalanced equation for the combustion of hexane:αC6H14(g)+βO2(g)→γCO2(g)+δH2O(g)A. Balance the equation.B. Determine how many moles of O2 are required to react completely with 5.2 moles C6H14
4.08 moles of O2 are required to react completely with 5.2 moles C6H14.
What is unbalanced equation?Chemical equations that are out of balance have the number of atoms of each element on the left side of the equation not matching the number of atoms of each element on the right side. Chemical reactions cannot be correctly represented by equations that are not balanced; balanced equations are necessary.
A. To balance the equation, we need to determine the correct coefficients (α, β, γ, δ) for the reactants and products such that the number of atoms of each element is equal on both sides of the equation.
We can see that we need 14 carbon atoms on both sides, 14 hydrogen atoms on both sides, and 6 oxygen atoms on both sides
Balancing the equation:
C6H14(g) + 19/5 O2(g) → 6CO2(g) + 7H2O(g)
B. To determine the moles of O2 required to react completely with 5.2 moles of C6H14, we can use the balanced equation. We know that the ratio of C6H14 to O2 is 1:19/5. Therefore, to react completely with 5.2 moles of C6H14, we need 19/5 * 5.2 moles of O2, which is approximately 4.08 moles of O2.
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when 2.75 dm3 of o2 reacts with an excess of glucose, according to the reaction below, what volume of carbon dioxide will be produced
2C6H12O6(s) + 6O2(g) -> 12CO2(g) + 6H2O(l)
The reaction given is a combustion reaction of glucose. The balanced equation tells us that for every 2 moles of glucose, 6 moles of O2 are consumed and 12 moles of CO2 are produced.
We are given that 2.75 dm3 of O2 is reacting, which we can convert to moles using the ideal gas law PV = nRT where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant and T is temperature.
Given that the temperature is in Kelvin and R = 8.314 J K-1mol-1
n = (PV) / RT = (2.75 dm3 * 1atm) / (8.314 J K-1mol-1 * 298K) = 0.0591 mol O2
Since the number of moles of O2 is 0.0591 mol, the number of moles of CO2 produced will be 12 * 0.0591 mol = 0.709 mol
To find the volume of CO2 produced, we can use the ideal gas law again:
V = nRT/P
V = (0.709 mol * 8.314 J K-1mol-1 * 298K) / 1 atm = 16.27 dm3
So the volume of carbon dioxide produced will be 16.27 dm3.
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calculate the pressure exerted by 2.50 l of hf gas containing 1.35 moles at 320 k? group of answer choices 1.00 atm 6.25 atm 14.2 atm 8.96 atm
At 320 K, 2.50 L of HF gas containing 1.35 moles exerts a pressure of 14.2 atm. Therefore, choice C is the right one.
An ideal gas is one in which there aren't any intermolecular attractive forces and all atom-to-atom or molecule-to-molecule collisions are entirely elastic. This equation of state connects a gas's volume, pressure, temperature, and mass. Then, the equation is written as PV=nRT where pressure is denoted by P, the number of moles is denoted by n, volume is denoted by V, and temperature is denoted by T.
Given V=2.50 L, T=230 K, and n=1.35 moles. We know that, R=0.0821 L atm/mol K. Then, the pressure of the given HF gas is calculated as follows,
[tex]\begin{aligned}P_{\mathrm{HF}}&=\frac{nRT}{V}\\&=\mathrm{\frac{1.35\;moles\times0.0821 \;L\;atm\;mol^{-1}\;K^{-1}\times 320 \;K}{2.5\;L}}\\&=\mathrm{14.19\;atm}\\&=\mathrm{14.2\;atm}\end{aligned}[/tex]
The required answer is 14. 2 atm.
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The rate constant of a certain reaction is known to obey the Arrhenius equation, and to have an activation energy =Ea20. 0/kJmol. If the rate constant of this reaction is ×7. 7107·M−1s−1 at 221. 0°C, what will the rate constant be at 253. 0°C?
Round your answer to 2 significant digits
If the rate constant of this reaction is 7. 7107M1s1 at 221. 0°C, it is 11.3 M-1s-1 at 253. 0°C.
To find the rate constant at 253.0°C, we can use the Arrhenius equation: k = A * e^(-Ea / RT).where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, and T is the temperature in Kelvin.
We know that the activation energy is Ea = 20.0 kJ/mol, and
the rate constant at 221.0°C is k1 = 7.7107 M^-1s^-1. We can use the known values to find the pre-exponential factor
A:k1 = A * e^(-Ea / R * T1) 7.7107 M^-1s^-1
= A * e^(-20.0 * 10^3 J/mol * (1/8.314 J/mol * K) * (494.0 K)).
A = 7.7107 * e^(20.0 * 10^3 J/mol / (8.314 J/mol * K) * (221.0 - 273.15)).
We can now use this value of A to find the rate constant at 253.0°C:
k2 = A * e^(-Ea / R * T2) = A * e^(-20.0 * 10^3 J/mol / (8.314 J/mol * K) * (526.15 K)).
k2 = 7.7107 * e^(20.0 * 10^3 J/mol / (8.314 J/mol * K) * (221.0 - 273.15)) * e^(-20.0 * 10^3 J/mol / (8.314 J/mol * K) * (253.0 - 273.15)).
k2 = 11.3 M^-1s^-1So the rate constant at 253.0°C is 11.3 M^-1s^-1 rounded to 2 significant digits.
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Calculate how many moles is 37g of calcium hydroxide.
Answer:
0.5 mol
Explanation:
37/(40+2+32)=0.5 mol
