The rate law for the rearrangement of CH3NC to CH3CN at 800 K is rate = (1300 s-1)[CH3NC]. What is the half-life for this reaction?

A) 7.69 × 10-4 s B) 5.3 × 10-4 s C) 1.9 × 10-3 s D) 520 s E) 1920 s A) 7.69 × 10-4 s B) 5.3 × 10-4 s C) 1.9 × 10-3 s D) 520 s E) 1920 s

Exam 14: Chemical Kinetics

At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min-1.If the starting concentration of pesticide is 0.0314 M,what concentration will remain after 62.0 min at 25°C?

(Multiple Choice)

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Question 81

The reaction CH₃NC(g)→ CH₃CN(g)is first order with respect to methyl isocyanide,CH₃NC.If it takes 10.3 minutes for exactly one quarter of the initial amount of methyl isocyanide to react,what is the rate constant in units of min^-1?

(Multiple Choice)

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Question 82

Consider reactions A,B,and C,which have the potential energy profiles shown.Assuming that the reactions have roughly the same frequency factors,which reaction is the slowest?

(Multiple Choice)

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Question 83

Which of the following is the correct unit for a second-order rate constant?

(Multiple Choice)

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Question 84

A reaction intermediate is a species corresponding to a local energy maximum on a reaction energy diagram.

(True/False)

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Question 85

What is the rate expression for the production of X,which is a gas,at constant volume?

(Multiple Choice)

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Question 86

The rate constant for the reaction 3A → 4B is 6.00 × 10^-3 L • mol^-1 • min^-1.How long will it take the concentration of A to drop from 0.75 M to 0.25 M?

(Multiple Choice)

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Question 87

The rate law for the rearrangement of CH₃NC to CH₃CN at 800 K is rate = (1300 s^-1)[CH₃NC]. What is the half-life for this reaction?

(Multiple Choice)

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Question 88

Sucrose decomposes to fructose and glucose in acid solution.When ln [sucrose] is plotted vs.time,a straight line with slope of -0.208 h^-1 results.What is the rate law for the reaction?

(Multiple Choice)

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Question 89

The following is an Arrhenius plot of a first-order reaction.The rate constant is measured in units of s^-1. Based on this Arrhenius plot,what is the Arrhenius frequency factor (A)of the reaction? (R =8.314 J/K mol)

(Multiple Choice)

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Question 90

For the hypothetical reaction A + 3B → 2C,the rate should be expressed as

(Multiple Choice)

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Question 91

What is the half-life for a first-order reaction?

(Multiple Choice)

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Question 92

What is the name given to the slowest step in the mechanism of a reaction?

(Multiple Choice)

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Question 93

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25°C.How long will it take for the reaction to be 90% complete?

(Multiple Choice)

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Question 94

What is the half-life for a zeroth-order reaction?

(Multiple Choice)

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Question 95

The following diagram represents the zeroth-order decomposition of A to form X according to the following balanced chemical equation: A → X.Each sphere represents 1.0 mmol of atoms,and the volume of the box is 1.0 L. What is the half-life of the reaction?

(Multiple Choice)

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Question 96

A(n)_______________ is the name given to a collision that does result in a reaction.

(Short Answer)

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Question 97

Cyclopropane is converted to propene in a first-order process.The rate constant is 5.4 × 10^-2h^-1.If the initial concentration of cyclopropane is 0.150 M,what will its concentration be after 22.0 hours?

(Multiple Choice)

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Question 98

The reaction A + 2B → products has been found to have the rate law,rate = k[A][B]².While holding the concentration of A constant,the concentration of B is increased to three times its initial value.By what factor does the rate of reaction increase?

(Multiple Choice)

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Question 99

Nitric oxide gas (NO)reacts with chlorine gas according to the equation The following initial rates of reaction have been measured for the given reagent concentrations. Cl₂ (M)

(Multiple Choice)

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Question 100

Showing 81 - 100 of 114

Exam 14: Chemical Kinetics

At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10-3 min-1.If the starting concentration of pesticide is 0.0314 M,what concentration will remain after 62.0 min at 25°C?

The reaction CH3NC(g)→ CH3CN(g)is first order with respect to methyl isocyanide,CH3NC.If it takes 10.3 minutes for exactly one quarter of the initial amount of methyl isocyanide to react,what is the rate constant in units of min-1?

Consider reactions A,B,and C,which have the potential energy profiles shown.Assuming that the reactions have roughly the same frequency factors,which reaction is the slowest?

Which of the following is the correct unit for a second-order rate constant?

A reaction intermediate is a species corresponding to a local energy maximum on a reaction energy diagram.

What is the rate expression for the production of X,which is a gas,at constant volume?

The rate constant for the reaction 3A → 4B is 6.00 × 10-3 L • mol-1 • min-1.How long will it take the concentration of A to drop from 0.75 M to 0.25 M?

The rate law for the rearrangement of CH3NC to CH3CN at 800 K is rate = (1300 s-1)[CH3NC]. What is the half-life for this reaction?

Sucrose decomposes to fructose and glucose in acid solution.When ln [sucrose] is plotted vs.time,a straight line with slope of -0.208 h-1 results.What is the rate law for the reaction?

The following is an Arrhenius plot of a first-order reaction.The rate constant is measured in units of s-1. Based on this Arrhenius plot,what is the Arrhenius frequency factor (A)of the reaction? (R =8.314 J/K mol)

For the hypothetical reaction A + 3B → 2C,the rate should be expressed as

What is the half-life for a first-order reaction?

What is the name given to the slowest step in the mechanism of a reaction?

It takes 42.0 min for the concentration of a reactant in a first-order reaction to drop from 0.45 M to 0.32 M at 25°C.How long will it take for the reaction to be 90% complete?

What is the half-life for a zeroth-order reaction?

The following diagram represents the zeroth-order decomposition of A to form X according to the following balanced chemical equation: A → X.Each sphere represents 1.0 mmol of atoms,and the volume of the box is 1.0 L. What is the half-life of the reaction?

A(n)_______________ is the name given to a collision that does result in a reaction.

Cyclopropane is converted to propene in a first-order process.The rate constant is 5.4 × 10-2 h-1.If the initial concentration of cyclopropane is 0.150 M,what will its concentration be after 22.0 hours?

The reaction A + 2B → products has been found to have the rate law,rate = k[A][B]2.While holding the concentration of A constant,the concentration of B is increased to three times its initial value.By what factor does the rate of reaction increase?

Nitric oxide gas (NO)reacts with chlorine gas according to the equation The following initial rates of reaction have been measured for the given reagent concentrations. Cl2 (M)

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At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min-1.If the starting concentration of pesticide is 0.0314 M,what concentration will remain after 62.0 min at 25°C?

The reaction CH₃NC(g)→ CH₃CN(g)is first order with respect to methyl isocyanide,CH₃NC.If it takes 10.3 minutes for exactly one quarter of the initial amount of methyl isocyanide to react,what is the rate constant in units of min^-1?

The rate constant for the reaction 3A → 4B is 6.00 × 10^-3 L • mol^-1 • min^-1.How long will it take the concentration of A to drop from 0.75 M to 0.25 M?

The rate law for the rearrangement of CH₃NC to CH₃CN at 800 K is rate = (1300 s^-1)[CH₃NC]. What is the half-life for this reaction?

Sucrose decomposes to fructose and glucose in acid solution.When ln [sucrose] is plotted vs.time,a straight line with slope of -0.208 h^-1 results.What is the rate law for the reaction?

The following is an Arrhenius plot of a first-order reaction.The rate constant is measured in units of s^-1. Based on this Arrhenius plot,what is the Arrhenius frequency factor (A)of the reaction? (R =8.314 J/K mol)

Cyclopropane is converted to propene in a first-order process.The rate constant is 5.4 × 10^-2h^-1.If the initial concentration of cyclopropane is 0.150 M,what will its concentration be after 22.0 hours?

The reaction A + 2B → products has been found to have the rate law,rate = k[A][B]².While holding the concentration of A constant,the concentration of B is increased to three times its initial value.By what factor does the rate of reaction increase?

Nitric oxide gas (NO)reacts with chlorine gas according to the equation The following initial rates of reaction have been measured for the given reagent concentrations. Cl₂ (M)