Question 1

In an elementary step of a reaction mechanism, the molecularities are determined by ________

Accepted Answer

A)  the reactant concentrations.
B)  the stoichiometric coefficients.
C)  the product concentrations.
D)  experiment.
E)  the difference between the forward and reverse rates.F) B) and D)
G) A) and B)

Question 2

For the following energy profile:
a) identify any reaction intermediates, 
b) identify any transition states, 
c) state the number of steps, 
d) state whether the reaction is endo- or exothermic, 
e) indicate which step is rate determining.

Accepted Answer

a) III is a reaction intermedi...

Question 3

If the rate of the reaction:  is 0.870 M/s over the first 12.25 s, how much hydrogen sulfide will be consumed during this time?

Accepted Answer

A)  10.66 M
B)  21.32 M
C)  5.33 M
D)  31.98 M
E)  3.55 MF) A) and B)
G) A) and E)

Question 4

The following figure shows Arrhenius plots for four different reactions. Which reaction has the largest frequency factor?

Accepted Answer

A)  a
B)  b
C)  c
D)  dE) B) and C)
F) All of the above

Question 5

If the rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of N2? 2?   A) 0.173 M/s B) 0.345 M/s C) 0.690 M/s D) 245 M/s E) 0.518 M/s" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0.173 M/s
B)  0.345 M/s
C)  0.690 M/s
D)  245 M/s
E)  0.518 M/sF) A) and C)
G) A) and E)

Question 6

Which plot would provide the activation energy for a reaction?

Accepted Answer

A)   
B)   
C)   
D)   E) All of the above
F) None of the above

Question 7

One reaction that occurs in an automobile catalytic converter is the conversion of nitrogen monoxide to nitrogen and oxygen. How is the rate of this reaction related to the rate at which the concentration of a reactant or product changes? 2NO(g)  →N2(g)   O2(g) 
I. Rate  2(g)   O2(g)  I. Rate     II. Rate     III. Rate   IV. Rate     A) I only B) II only C) III and IV only D) I, III, and IV only E) II, III, and IV only" class="answers-bank-image d-inline" rel="preload" > 
II. Rate  2(g)   O2(g)  I. Rate     II. Rate     III. Rate   IV. Rate     A) I only B) II only C) III and IV only D) I, III, and IV only E) II, III, and IV only" class="answers-bank-image d-inline" rel="preload" > 
III. Rate  2(g)   O2(g)  I. Rate     II. Rate     III. Rate   IV. Rate     A) I only B) II only C) III and IV only D) I, III, and IV only E) II, III, and IV only" class="answers-bank-image d-inline" rel="preload" >IV. Rate  2(g)   O2(g)  I. Rate     II. Rate     III. Rate   IV. Rate     A) I only B) II only C) III and IV only D) I, III, and IV only E) II, III, and IV only" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  I only
B)  II only
C)  III and IV only
D)  I, III, and IV only
E)  II, III, and IV onlyF) A) and C)
G) A) and E)

Question 8

In a first-order reaction, the initial concentration of A is 0.40 M. What is the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?

Accepted Answer

1.3 F1F1F1...

Question 9

If the rate of formation of nitrogen monoxide is 0.413 M/s, what is the rate of disappearance of SO2? 2?   A) 0.207 M/s B) 0.280 M/s C) 0.413 M/s D) 0.620 M/s E) 1.24 M/s" class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  0.207 M/s
B)  0.280 M/s
C)  0.413 M/s
D)  0.620 M/s
E)  1.24 M/sF) A) and B)
G) B) and C) D

Question 10

HI dissociates to form I2 and H2: 2 and H2:   If the concentration of HI changes at a rate of 0.45 M/s, what is the rate of appearance of I2(g) ? A) 0.90 M/s B) 0.45 M/s C) 0.23 M/s D) 1.00 M/s E) 0.13 M/s" class="answers-bank-image d-inline" rel="preload" > If the concentration of HI changes at a rate of 0.45 M/s, what is the rate of appearance of I2(g) ?

Accepted Answer

A)  0.90 M/s
B)  0.45 M/s
C)  0.23 M/s
D)  1.00 M/s
E)  0.13 M/sF) B) and D)
G) None of the above

Question 11

The rate law of a particular reaction was determined to be Rate  k. What is the unit of the rate constant for the reaction?

Accepted Answer

A)  M/s
B)  1/(Ms) 
C)  1/(Ms2) 
D)  1/s
E)  MsF) C) and E)
G) A) and B) A

Question 12

For the reaction 2A 4B  3D, the rate of the reaction in terms of B would be written as ________ A) (   )  B) (   )  C) (      )  D) (+      )  E) (   ) " class="answers-bank-image d-inline" rel="preload" > 4B  3D, the rate of the reaction in terms of B would be written as ________

Accepted Answer

A)  ( 4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" > ) 
B)  ( 4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" > ) 
C)  ( 4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" >  4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" > ) 
D)  (+ 4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" >  4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" > ) 
E)  ( 4B  3D, the rate of the reaction in terms of B would be written as ________ 
A)  (   )  
B)  (   )  
C)  (      )  
D)  (+      )  
E)  (   ) " class="answers-bank-image d-inline" rel="preload" > ) F) A) and C)
G) D) and E)

Question 13

A scientist conducts an experiment to determine the rate of the following reaction:  If the initial concentration of NO2 was 0.250 M and the concentration of NO2 was 0.200 M after
0.200 s, what is the average rate of the reaction?

Accepted Answer

Question 14

Given the following data for the reaction A F1F1F1S1F1F1F10 B, determine the activation energy, Ea, of the reaction.
k (M/s)
T (K)
2.04 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F104
250
6.78 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F103
400

Accepted Answer

Question 15

The linear form of the Arrhenius equation is very useful, as a plot of ________ versus ________ allows us to calculate the activation energy from the slope and the frequency factor from the intercept.

Accepted Answer

The answer of The linear form of the Arrhenius equation...

Question 16

A scientist conducts an experiment to determine the rate of NO formation in the reaction: 2 was 0.500 M and the concentration of N2 was 0.450 M after 0.100 s, what is the average rate of NO formation? A) 0.500 M/s B) 1.00 M/s C) 5.00 M/s D) 10.0 M/s E) 0.250 M/s" class="answers-bank-image d-inline" rel="preload" > If the initial concentration of N2 was 0.500 M and the concentration of N2 was 0.450 M after 0.100 s, what is the average rate of NO formation?

Accepted Answer

A)  0.500 M/s
B)  1.00 M/s
C)  5.00 M/s
D)  10.0 M/s
E)  0.250 M/sF) None of the above
G) A) and E)

Question 17

Given the following data for the reaction A B, determine the activation energy, Ea, of the reaction. k (M/s)  T (K)  0) 730 250 0) 739 450 A) 54.4 J/mol B) 6.89 J/mol C) 39.9 J/mol D) 57.3 J/mol E) 374 J/mol" class="answers-bank-image d-inline" rel="preload" > B, determine the activation energy, Ea, of the reaction. k (M/s) 
T (K) 
0) 730
250
0) 739
450

Accepted Answer

A)  54.4 J/mol
B)  6.89 J/mol
C)  39.9 J/mol
D)  57.3 J/mol
E)  374 J/molF) A) and B)
G) A) and C)

Question 18

The order in which ozone, nitrogen monoxide, and nitrogen dioxide build up in the atmosphere over the course of the day is ________, then ________, then ________.

Accepted Answer

A)  NO; NO2; O3
B)  NO; O3; NO2
C)  NO2; NO; O3
D)  NO2; O3; NO
E)  O3; NO; NO2F) C) and D)
G) A) and B) A

Question 19

The rate at which popcorn pops was measured at two different temperatures. How many times faster does the popcorn pop at 250°C compared with that at 210°C when the activation energy is 53.8 kJ/mol?

Accepted Answer

A)  2.8
B)  3.9
C)  140
D)  125
E)  12.7F) A) and C)
G) B) and D)

Question 20

A proposed mechanism for the decomposition of ozone in the atmosphere is: Step 1: 3 C) ClO D) O2 E) This mechanism has no intermediates." class="answers-bank-image d-inline" rel="preload" > Step 2: 3 C) ClO D) O2 E) This mechanism has no intermediates." class="answers-bank-image d-inline" rel="preload" > Which of the following species is an intermediate?

Accepted Answer

A)  Cl
B)  O3
C)  ClO
D)  O2
E)  This mechanism has no intermediates.F) All of the above
G) A) and B)

Exam 13: Chemical Kinetics: Reactions in the Atmosphere

In an elementary step of a reaction mechanism, the molecularities are determined by ________

Correct Answer
verified

For the following energy profile: a) identify any reaction intermediates, b) identify any transition states, c) state the number of steps, d) state whether the reaction is endo- or exothermic, e) indicate which step is rate determining.

Correct Answer
verified
a) III is a reaction intermedi...
View Answer

If the rate of the reaction: is 0.870 M/s over the first 12.25 s, how much hydrogen sulfide will be consumed during this time?

Correct Answer
verified

The following figure shows Arrhenius plots for four different reactions. Which reaction has the largest frequency factor?

Correct Answer
verified

If the rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of N₂?

Correct Answer
verified

Which plot would provide the activation energy for a reaction?

Correct Answer
verified

Correct Answer
verified

In a first-order reaction, the initial concentration of A is 0.40 M. What is the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?

Correct Answer
verified
1.3 F1F1F1...
View Answer

If the rate of formation of nitrogen monoxide is 0.413 M/s, what is the rate of disappearance of SO₂?

Correct Answer
verified
D

HI dissociates to form I₂ and H₂: If the concentration of HI changes at a rate of 0.45 M/s, what is the rate of appearance of I₂(g) ?

Correct Answer
verified

The rate law of a particular reaction was determined to be Rate  k. What is the unit of the rate constant for the reaction?

Correct Answer
verified
A

For the reaction 2A 4B  3D, the rate of the reaction in terms of B would be written as ________

Correct Answer
verified

A scientist conducts an experiment to determine the rate of the following reaction: If the initial concentration of NO₂ was 0.250 M and the concentration of NO₂ was 0.200 M after 0.200 s, what is the average rate of the reaction?

Correct Answer
verified

Given the following data for the reaction A  B, determine the activation energy, E_a, of the reaction. k (M/s) T (K) 2.04  10^⁴ 250 6.78  10^³ 400

Correct Answer
verified

The linear form of the Arrhenius equation is very useful, as a plot of versus allows us to calculate the activation energy from the slope and the frequency factor from the intercept.

Correct Answer
verified

A scientist conducts an experiment to determine the rate of NO formation in the reaction: If the initial concentration of N₂ was 0.500 M and the concentration of N₂ was 0.450 M after 0.100 s, what is the average rate of NO formation?

Correct Answer
verified

Given the following data for the reaction A B, determine the activation energy, E_a, of the reaction. k (M/s) T (K) 0) 730 250 0) 739 450

Correct Answer
verified

The order in which ozone, nitrogen monoxide, and nitrogen dioxide build up in the atmosphere over the course of the day is , then , then .

Correct Answer
verified
A

The rate at which popcorn pops was measured at two different temperatures. How many times faster does the popcorn pop at 250°C compared with that at 210°C when the activation energy is 53.8 kJ/mol?

Correct Answer
verified

A proposed mechanism for the decomposition of ozone in the atmosphere is: Step 1: Step 2: Which of the following species is an intermediate?

Correct Answer
verified

Exam 13: Chemical Kinetics: Reactions in the Atmosphere

In an elementary step of a reaction mechanism, the molecularities are determined by ________

Correct AnswerverifiedShow Answer

For the following energy profile: a) identify any reaction intermediates, b) identify any transition states, c) state the number of steps, d) state whether the reaction is endo- or exothermic, e) indicate which step is rate determining.

Correct Answerverifieda) III is a reaction intermedi...View AnswerShow Answer

If the rate of the reaction: is 0.870 M/s over the first 12.25 s, how much hydrogen sulfide will be consumed during this time?

Correct AnswerverifiedShow Answer

The following figure shows Arrhenius plots for four different reactions. Which reaction has the largest frequency factor?

Correct AnswerverifiedShow Answer

If the rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of N2?

Correct AnswerverifiedShow Answer

Which plot would provide the activation energy for a reaction?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

In a first-order reaction, the initial concentration of A is 0.40 M. What is the concentration of A after 15 seconds if the half-life of the reaction is 3 seconds?

Correct Answerverified1.3 F1F1F1...View AnswerShow Answer

If the rate of formation of nitrogen monoxide is 0.413 M/s, what is the rate of disappearance of SO2?

Correct AnswerverifiedD

HI dissociates to form I2 and H2: If the concentration of HI changes at a rate of 0.45 M/s, what is the rate of appearance of I2(g) ?

Correct AnswerverifiedShow Answer

The rate law of a particular reaction was determined to be Rate  k. What is the unit of the rate constant for the reaction?

Correct AnswerverifiedA

For the reaction 2A 4B  3D, the rate of the reaction in terms of B would be written as ________

Correct AnswerverifiedShow Answer

A scientist conducts an experiment to determine the rate of the following reaction: If the initial concentration of NO2 was 0.250 M and the concentration of NO2 was 0.200 M after 0.200 s, what is the average rate of the reaction?

Correct AnswerverifiedShow Answer

Given the following data for the reaction A  B, determine the activation energy, Ea, of the reaction. k (M/s) T (K) 2.04  104 250 6.78  103 400

Correct AnswerverifiedShow Answer

The linear form of the Arrhenius equation is very useful, as a plot of ________ versus ________ allows us to calculate the activation energy from the slope and the frequency factor from the intercept.

Correct AnswerverifiedShow Answer

A scientist conducts an experiment to determine the rate of NO formation in the reaction: If the initial concentration of N2 was 0.500 M and the concentration of N2 was 0.450 M after 0.100 s, what is the average rate of NO formation?

Correct AnswerverifiedShow Answer

Given the following data for the reaction A B, determine the activation energy, Ea, of the reaction. k (M/s) T (K) 0) 730 250 0) 739 450

Correct AnswerverifiedShow Answer

The order in which ozone, nitrogen monoxide, and nitrogen dioxide build up in the atmosphere over the course of the day is ________, then ________, then ________.

Correct AnswerverifiedA

The rate at which popcorn pops was measured at two different temperatures. How many times faster does the popcorn pop at 250°C compared with that at 210°C when the activation energy is 53.8 kJ/mol?

Correct AnswerverifiedShow Answer

A proposed mechanism for the decomposition of ozone in the atmosphere is: Step 1: Step 2: Which of the following species is an intermediate?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
a) III is a reaction intermedi...
View Answer

Correct Answer
verified

Correct Answer
verified

If the rate of formation of ammonia is 0.345 M/s, what is the rate of disappearance of N₂?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
1.3 F1F1F1...
View Answer

If the rate of formation of nitrogen monoxide is 0.413 M/s, what is the rate of disappearance of SO₂?

Correct Answer
verified
D

HI dissociates to form I₂ and H₂: If the concentration of HI changes at a rate of 0.45 M/s, what is the rate of appearance of I₂(g) ?

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified

A scientist conducts an experiment to determine the rate of the following reaction: If the initial concentration of NO₂ was 0.250 M and the concentration of NO₂ was 0.200 M after 0.200 s, what is the average rate of the reaction?

Correct Answer
verified

Given the following data for the reaction A  B, determine the activation energy, E_a, of the reaction. k (M/s) T (K) 2.04  10^⁴ 250 6.78  10^³ 400

Correct Answer
verified

The linear form of the Arrhenius equation is very useful, as a plot of versus allows us to calculate the activation energy from the slope and the frequency factor from the intercept.

Correct Answer
verified

A scientist conducts an experiment to determine the rate of NO formation in the reaction: If the initial concentration of N₂ was 0.500 M and the concentration of N₂ was 0.450 M after 0.100 s, what is the average rate of NO formation?

Correct Answer
verified

Given the following data for the reaction A B, determine the activation energy, E_a, of the reaction. k (M/s) T (K) 0) 730 250 0) 739 450

Correct Answer
verified

The order in which ozone, nitrogen monoxide, and nitrogen dioxide build up in the atmosphere over the course of the day is , then , then .

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified