Question 1

The data in the table below were obtained for the reaction:
A + B → P 
-The magnitude of the rate constant is .

Accepted Answer

A)   38.0
B)   0.278
C)   13.2
D)   2.21
E)   42.0

Question 2

Heterogeneous catalysts have different phases from reactants.

Accepted Answer

A) True 
 B)False

Question 3

The data in the table below were obtained for the reaction:
2 ClO2 (aq)  + 2 OH- (aq)  →ClO3- (aq)  + ClO2- (aq)  + H2O (1)  2 (aq)  + 2 OH- (aq)  →ClO3- (aq)  + ClO2- (aq)  + H2O (1)    -What is the magnitude of the rate constant for the reaction? A)  4.6 B)  115 C)  230 D)  713 E)  1.15 × 104" class="answers-bank-image d-inline" rel="preload" >
-What is the magnitude of the rate constant for the reaction?

Accepted Answer

A)   4.6
B)   115
C)   230
D)   713
E)   1.15 × 104

Question 4

The concentration of reactants or products at any time during the reaction can be calculated from the integrated rate law.

Accepted Answer

A) True 
 B)False

Question 5

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen:
2N2O5(g)  → 4NO2 (g)  + O2 (g) 
When the rate of formation of NO2 is 5.5 × 10- 4 M/s, the rate of decomposition of N2O5 is
M/s)

Accepted Answer

A)   10.1 × 10- 4
B)   5.5 × 10- 4
C)   2.8 × 10- 4
D)   2.2 × 10- 3
E)   1.4 × 10- 4

Question 6

The reaction
2NO2 → 2NO + O2
Follows second- order kinetics. At 300°C, [NO2] drops from 0.0100- to 0.00650- M in 100 s. The rate constant for the reaction is _ M- 1s- 1.

Accepted Answer

A)   1.2
B)   0.096
C)   0.65
D)   0.54
E)   0.81

Question 7

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)  → H2 (g)  + Br2 (g) 
Is 0.190 M s- 1 at 150°C. The rate of reaction is M s- 1.

Accepted Answer

A)   2.63
B)   0.086
C)   0.0361
D)   0.095
E)   0.380

Question 8

The average rate of disappearance of I- between 400 s and 800 s is M/s.

Accepted Answer

A)   1.4 × 10- 5 
B)   3.6 × 104 
C)   5.8 × 10- 5 
D)   2.6 × 10- 4 
E)   2.8 × 10- 5

Question 9

A catalyst can increase the rate of a reaction .

Accepted Answer

A)   by providing an alternative pathway with a lower activation energy
B)   by lowering the overall activation energy (Ea)  of the reaction
C)   by lowering the activation energy of the reverse reaction
D)   by changing the value of the frequency factor (
A)  
E)   All of these are ways that a catalyst might act to increase the rate of reaction.

Question 10

The enzyme nitrogenase converts _ _ into _.

Accepted Answer

A)   nitrogen oxides, N2 and O2
B)   nitroglycerine, nitric acid, and glycerine
C)   ammonia, urea
D)   CO and unburned hydrocarbons, H2O and CO2
E)   nitrogen, ammonia

Question 11

The graph shown below depicts the relationship between concentration and time for the following chemical reaction.
o  B)  1/k C)  - k D)  - 1/k E)  k" class="answers-bank-image d-inline" rel="preload" >
The slope of this line is equal to .

Accepted Answer

A)   ln[A]o 
B)   1/k
C)   - k
D)   - 1/k
E)   k

Question 12

The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is order in B.
A + B → P

Accepted Answer

A)   zero
B)   first
C)   second
D)   third
E)   one- half

Question 13

Reaction rate data obey an equation devised by _ .

Accepted Answer

The answer of Reaction rate data obey an equation devised...

Question 14

Consider the following reaction:
A - 2C
The average rate of appearance of C is given by O[C]/Ot. Comparing the rate of appearance of C and the rate of disappearance of A, we get O[C]/Ot = × (O[A]/Ot) .

Accepted Answer

A)   +1/2
B)   - 1/2
C)   +2
D)   +1
E)   - 1

Question 15

Of the units below, are appropriate for a first- order reaction rate constant.

Accepted Answer

A)   s- 1
B)   mol/L
C)   L mol- 1 s- 1
D)   M s- 1
E)   .M- 1 s- 1

Question 16

Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Accepted Answer

A)  
B)   
C)  
D)   
E)

Question 17

At elevated temperatures, methylisonitrile (CH3NC)  isomerizes to acetonitrile (CH3CN) :
CH3NC (g)   →  CH3CN (g) 
At the start of an experiment, there are 0.200 mol of reactant and 0 mol of product in the reaction vessel. After 25 min, 0.108 mol of reactant (CH3NC)  remain. There are _ _ mol of product (CH3CN)  in the reaction vessel.

Accepted Answer

A)   0.200
B)   0.308
C)   0.540
D)   0.022
E)   0.092

Question 18

The concentration of S2O82- remaining at 400 s is _ M.

Accepted Answer

A)   +0.057
B)   - 0.007
C)   +0.015
D)   +0.035
E)   +0.045

Question 19

In general, as temperature goes up, reaction rate .

Accepted Answer

A)   goes up if the reaction is endothermic
B)   goes up if the reaction is exothermic
C)   stays the same regardless of whether the reaction is exothermic or endothermic
D)   goes up regardless of whether the reaction is exothermic or endothermic
E)   stays the same if the reaction is first order

Question 20

The rate constant for a second- order reaction is 0.13 M- 1s- 1. If the initial concentration of reactant is 0.26 mol/L, it takes s for the concentration to decrease to 0.13 mol/L.

Accepted Answer

A)   1.0
B)   0.017
C)   30
D)   4.4 × 10- 3 
E)   0.50

Exam 14: Chemical Kinetics

The data in the table below were obtained for the reaction: A + B → P -The magnitude of the rate constant is .

Correct Answer
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Heterogeneous catalysts have different phases from reactants.

Correct Answer
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Correct Answer
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The concentration of reactants or products at any time during the reaction can be calculated from the integrated rate law.

Correct Answer
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A catalyst can increase the rate of a reaction .

Correct Answer
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The enzyme nitrogenase converts _ _ into _.

Correct Answer
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Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Correct Answer
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The reaction 2NO₂→ 2NO + O₂ Follows second- order kinetics. At 300°C, [NO₂] drops from 0.0100- to 0.00650- M in 100 s. The rate constant for the reaction is _ M^-¹s^-¹.

Correct Answer
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Reaction rate data obey an equation devised by _ .

Correct Answer
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Consider the following reaction: A - 2C The average rate of appearance of C is given by O[C]/Ot. Comparing the rate of appearance of C and the rate of disappearance of A, we get O[C]/Ot = × (O[A]/Ot) .

Correct Answer
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The data in the table below were obtained for the reaction: 2 ClO₂(aq) + 2 OH^-(aq) →ClO₃^-(aq) + ClO₂^-(aq) + H₂O (1) -What is the magnitude of the rate constant for the reaction?

Correct Answer
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In general, as temperature goes up, reaction rate .

Correct Answer
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The rate of disappearance of HBr in the gas phase reaction 2HBr (g) → H₂(g) + Br₂(g) Is 0.190 M s^-¹at 150°C. The rate of reaction is M s^-¹.

Correct Answer
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The concentration of S₂O₈²^-remaining at 400 s is _ M.

Correct Answer
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The rate constant for a second- order reaction is 0.13 M^-¹s^-¹. If the initial concentration of reactant is 0.26 mol/L, it takes s for the concentration to decrease to 0.13 mol/L.

Correct Answer
verified

The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is order in B. A + B → P

Correct Answer
verified

The graph shown below depicts the relationship between concentration and time for the following chemical reaction. The slope of this line is equal to .

Correct Answer
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The average rate of disappearance of I^-between 400 s and 800 s is M/s.

Correct Answer
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At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N₂O₅(g) → 4NO₂(g) + O₂(g) When the rate of formation of NO₂is 5.5 × 10^-⁴M/s, the rate of decomposition of ^N2^O5 is M/s)

Correct Answer
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Of the units below, are appropriate for a first- order reaction rate constant.

Correct Answer
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Exam 14: Chemical Kinetics

The data in the table below were obtained for the reaction: A + B → P -The magnitude of the rate constant is .

Correct AnswerverifiedShow Answer

Heterogeneous catalysts have different phases from reactants.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The concentration of reactants or products at any time during the reaction can be calculated from the integrated rate law.

Correct AnswerverifiedShow Answer

A catalyst can increase the rate of a reaction .

Correct AnswerverifiedShow Answer

The enzyme nitrogenase converts _ _ into _.

Correct AnswerverifiedShow Answer

Which one of the following graphs shows the correct relationship between concentration and time for a reaction that is second order in [A]?

Correct AnswerverifiedShow Answer

The reaction 2NO2 → 2NO + O2 Follows second- order kinetics. At 300°C, [NO2] drops from 0.0100- to 0.00650- M in 100 s. The rate constant for the reaction is _ M- 1s- 1.

Correct AnswerverifiedShow Answer

Reaction rate data obey an equation devised by _ .

Correct AnswerverifiedShow Answer

Consider the following reaction: A - 2C The average rate of appearance of C is given by O[C]/Ot. Comparing the rate of appearance of C and the rate of disappearance of A, we get O[C]/Ot = × (O[A]/Ot) .

Correct AnswerverifiedShow Answer

The data in the table below were obtained for the reaction: 2 ClO2 (aq) + 2 OH- (aq) →ClO3- (aq) + ClO2- (aq) + H2O (1) -What is the magnitude of the rate constant for the reaction?

Correct AnswerverifiedShow Answer

In general, as temperature goes up, reaction rate .

Correct AnswerverifiedShow Answer

The rate of disappearance of HBr in the gas phase reaction 2HBr (g) → H2 (g) + Br2 (g) Is 0.190 M s- 1 at 150°C. The rate of reaction is M s- 1.

Correct AnswerverifiedShow Answer

The concentration of S2O82- remaining at 400 s is _ M.

Correct AnswerverifiedShow Answer

The rate constant for a second- order reaction is 0.13 M- 1s- 1. If the initial concentration of reactant is 0.26 mol/L, it takes s for the concentration to decrease to 0.13 mol/L.

Correct AnswerverifiedShow Answer

The kinetics of the reaction below were studied and it was determined that the reaction rate did not change when the concentration of B was tripled. The reaction is order in B. A + B → P

Correct AnswerverifiedShow Answer

The graph shown below depicts the relationship between concentration and time for the following chemical reaction. The slope of this line is equal to .

Correct AnswerverifiedShow Answer

The average rate of disappearance of I- between 400 s and 800 s is M/s.

Correct AnswerverifiedShow Answer

At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N2O5(g) → 4NO2 (g) + O2 (g) When the rate of formation of NO2 is 5.5 × 10- 4 M/s, the rate of decomposition of N2O5 is M/s)

Correct AnswerverifiedShow Answer

Of the units below, are appropriate for a first- order reaction rate constant.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The reaction 2NO₂→ 2NO + O₂ Follows second- order kinetics. At 300°C, [NO₂] drops from 0.0100- to 0.00650- M in 100 s. The rate constant for the reaction is _ M^-¹s^-¹.

Correct Answer
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Correct Answer
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Correct Answer
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The data in the table below were obtained for the reaction: 2 ClO₂(aq) + 2 OH^-(aq) →ClO₃^-(aq) + ClO₂^-(aq) + H₂O (1) -What is the magnitude of the rate constant for the reaction?

Correct Answer
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Correct Answer
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The rate of disappearance of HBr in the gas phase reaction 2HBr (g) → H₂(g) + Br₂(g) Is 0.190 M s^-¹at 150°C. The rate of reaction is M s^-¹.

Correct Answer
verified

The concentration of S₂O₈²^-remaining at 400 s is _ M.

Correct Answer
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The rate constant for a second- order reaction is 0.13 M^-¹s^-¹. If the initial concentration of reactant is 0.26 mol/L, it takes s for the concentration to decrease to 0.13 mol/L.

Correct Answer
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Correct Answer
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Correct Answer
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The average rate of disappearance of I^-between 400 s and 800 s is M/s.

Correct Answer
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At elevated temperatures, dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N₂O₅(g) → 4NO₂(g) + O₂(g) When the rate of formation of NO₂is 5.5 × 10^-⁴M/s, the rate of decomposition of ^N2^O5 is M/s)

Correct Answer
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Correct Answer
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