Question 1

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 overall order of the reaction? A) 4 B) 0 C) 1 D) 2 E) 3" class="answers-bank-image d-inline" rel="preload" >
-What is the overall order of the reaction?

Accepted Answer

A)  4
B)  0
C)  1
D)  2
E)  3

Question 2

The combustion of ethylene proceeds by the reaction C2H4 (g)  + 3O2 (g)  → 2CO2 (g)  + 2H2O (g) 
When the rate of disappearance of O2 is 0.13 M s-1, the rate of appearance of CO2 is ________ M s-1.

Accepted Answer

A)  0.087
B)  0.043
C)  0.39
D)  0.20
E)  0.26

Question 3

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

Question 4

The isomerization of methylisonitrile to acetonitrile CH3NC (g)  → CH3CN (g) 
Is first order in CH3NC. The half-life of the reaction is 2.70 × 104 s at 463 K. The rate constant when the initial [CH3NC] is 0.030 M is ________ s-1.

Accepted Answer

A)  3.90 × 104
B)  1.23 × 10-3
C)  2.57 × 10-5
D)  8.10 × 102
E)  1.25 × 107

Question 5

________ are used in automotive catalytic converters.

Accepted Answer

A)  Heterogeneous catalysts
B)  Homogeneous catalysts
C)  Enzymes
D)  Noble gases
E)  Nonmetal oxides

Question 6

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g) . The following data are obtained for [A] as the reaction proceeds: -3" class="answers-bank-image d-inline" rel="preload" >
-How many moles of B are present at 10 s?

Accepted Answer

A)  0.011
B)  0.220
C)  0.110
D)  0.014
E)  1.4 × 10-3

Question 7

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

Accepted Answer

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

Question 8

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.13 M, it takes ________ min for it to decrease to 0.085 M.

Accepted Answer

A)  12
B)  10.
C)  8.0
D)  11
E)  7.0

Question 9

The peroxydisulfate ion (S2O82-) reacts with the iodide ion in aqueous solution via the reaction:
S2O82- (aq)  + 3I- → 2SO4 (aq) + I3- (aq) 
An aqueous solution containing 0.050 M of S2O82- ion and 0.072 M of I- is prepared, and the progress of the reaction followed by measuring [I-]. The data obtained is given in the table below. 2O82-) reacts with the iodide ion in aqueous solution via the reaction: S2O82- (aq)  + 3I- → 2SO4 (aq) + I3- (aq)  An aqueous solution containing 0.050 M of S2O82- ion and 0.072 M of I- is prepared, and the progress of the reaction followed by measuring [I-]. The data obtained is given in the table below.   -The average rate of disappearance of I- between 1200.0 s and 1600.0 s is ________ M/s. A) 1.8 × 10-5 B) 1.2 × 10-5 C) 2.0 × 10-5 D) 5.0 × 104 E) 1.6 × 10-4" class="answers-bank-image d-inline" rel="preload" >
-The average rate of disappearance of I- between 1200.0 s and 1600.0 s is ________ M/s.

Accepted Answer

A)  1.8 × 10-5
B)  1.2 × 10-5
C)  2.0 × 10-5
D)  5.0 × 104
E)  1.6 × 10-4

Question 10

The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

Accepted Answer

A)  5.8
B)  -5.8
C)  -0.047
D)  7.2
E)  0.040

Question 11

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.085 M, it takes ________ min for it to decrease to 0.055 M.

Accepted Answer

A)  8.2
B)  11
C)  3.6
D)  0.048
E)  8.4

Question 12

Consider the following reaction: 3A → 2B
The average rate of appearance of B is given by Δ[B]/Δt. Comparing the rate of appearance of B and the rate of disappearance of A, we get Δ[B]/Δt = ________ × (-Δ[A]/Δt) .

Accepted Answer

A)  -2/3
B)  +2/3
C)  -3/2
D)  +1
E)  +3/2

Question 13

The elementary reaction 2NO2 (g)  → 2NO (g)  + O2 (g) 
Is second order in NO2 and the rate constant at 660 K is 5.23 M-1s-1. The reaction half-life at this temperature when [NO2]0 = 0.45 M is ________ s.

Accepted Answer

A)  2.4
B)  7.6
C)  0.19
D)  0.13
E)  0.42

Question 14

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

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  0

Question 15

A reaction was found to be third order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to ________.

Accepted Answer

A)  remain constant
B)  increase by a factor of 27
C)  increase by a factor of 9
D)  triple
E)  decrease by a factor of the cube root of 3

Question 16

Of the following, all are valid units for a reaction rate except ________.

Accepted Answer

A)  mol/L
B)  M/s
C)  mol/hr
D)  g/s
E)  mol/L-hr

Question 17

At elevated temperatures, methylisonitrile (CH3NC) isomerizes to acetonitrile (CH3CN) : CH3NC (g)  → CH3CN (g) 
The dependence of the rate constant on temperature is studied and the graph below is prepared from the results. 3NC) isomerizes to acetonitrile (CH3CN) : CH3NC (g)  → CH3CN (g)  The dependence of the rate constant on temperature is studied and the graph below is prepared from the results.   The energy of activation of this reaction is ________ kJ/mol. A) 160 B) 1.6 × 105 C) 4.4 × 10-7 D) 4.4 × 10-4 E) 1.9 × 104" class="answers-bank-image d-inline" rel="preload" > The energy of activation of this reaction is ________ kJ/mol.

Accepted Answer

A)  160
B)  1.6 × 105
C)  4.4 × 10-7
D)  4.4 × 10-4
E)  1.9 × 104

Question 18

The reaction A (aq)  → B (aq) is first order in [A]. A solution is prepared with [A] = 1.22 M. The following data are obtained as the reaction proceeds: -1. A) 0.23 B) 1.0 C) 0.17 D) 0.12 E) -0.12" class="answers-bank-image d-inline" rel="preload" > The rate constant for this reaction is ________ s-1.

Accepted Answer

A)  0.23
B)  1.0
C)  0.17
D)  0.12
E)  -0.12

Question 19

For a first-order reaction, a plot of ________ versus ________ is linear.
A)ln [A]t,  
B)ln [A]t, t
C)  , t 
D)[A]t, t
E)t,

Accepted Answer

Question 20

Which one of the following is not a valid expression for the rate of the reaction below? 4NH3 + 7O2 → 4NO2 + 6H2O

Accepted Answer

A)  - 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" > 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" >
B)   3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" > 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" >
C)   3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" > 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" >
D)  - 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" > 3 + 7O2 → 4NO2 + 6H2O 
A)  -     
B)       
C)       
D)  -     
E)  All of the above are valid expressions of the reaction rate." class="answers-bank-image d-inline" rel="preload" >
E)  All of the above are valid expressions of the reaction rate.

Exam 14: Chemical Kinetics

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

Correct Answer
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Correct Answer
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The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g) Is first order in CH₃NC. The half-life of the reaction is 2.70 × 10⁴ s at 463 K. The rate constant when the initial [CH₃NC] is 0.030 M is ________ s^-1.

Correct Answer
verified

The elementary reaction 2NO₂ (g) → 2NO (g) + O₂ (g) Is second order in NO₂ and the rate constant at 660 K is 5.23 M^-1s^-1. The reaction half-life at this temperature when [NO₂]₀ = 0.45 M is ________ s.

Correct Answer
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The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.13 M, it takes ________ min for it to decrease to 0.085 M.

Correct Answer
verified

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 overall order of the reaction?

Correct Answer
verified

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g) . The following data are obtained for [A] as the reaction proceeds: -How many moles of B are present at 10 s?

Correct Answer
verified

The concentration of S₂O₈^2- remaining at 400 s is ________ M.

Correct Answer
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Which one of the following is not a valid expression for the rate of the reaction below? 4NH₃ + 7O₂ → 4NO₂ + 6H₂O

Correct Answer
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The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.085 M, it takes ________ min for it to decrease to 0.055 M.

Correct Answer
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Consider the following reaction: 3A → 2B The average rate of appearance of B is given by Δ[B]/Δt. Comparing the rate of appearance of B and the rate of disappearance of A, we get Δ[B]/Δt = ________ × (-Δ[A]/Δt) .

Correct Answer
verified

________ are used in automotive catalytic converters.

Correct Answer
verified

The rate constant for a particular zero-order reaction is 0.075 M s^-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

Correct Answer
verified

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 Answer
verified

The reaction A (aq) → B (aq) is first order in [A]. A solution is prepared with [A] = 1.22 M. The following data are obtained as the reaction proceeds: The rate constant for this reaction is ________ s^-1.

Correct Answer
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A reaction was found to be third order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to ________.

Correct Answer
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The combustion of ethylene proceeds by the reaction C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.13 M s^-1, the rate of appearance of CO₂ is ________ M s^-1.

Correct Answer
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Of the following, all are valid units for a reaction rate except ________.

Correct Answer
verified

For a first-order reaction, a plot of versus is linear. A)ln [A]_t, B)ln [A]_t, t C) , t D)[A]_t, t E)t,

Correct Answer
verified

At elevated temperatures, methylisonitrile (CH₃NC) isomerizes to acetonitrile (CH₃CN) : CH₃NC (g) → CH₃CN (g) The dependence of the rate constant on temperature is studied and the graph below is prepared from the results. The energy of activation of this reaction is ________ kJ/mol.

Correct Answer
verified

Exam 14: Chemical Kinetics

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The isomerization of methylisonitrile to acetonitrile CH3NC (g) → CH3CN (g) Is first order in CH3NC. The half-life of the reaction is 2.70 × 104 s at 463 K. The rate constant when the initial [CH3NC] is 0.030 M is ________ s-1.

Correct AnswerverifiedShow Answer

The elementary reaction 2NO2 (g) → 2NO (g) + O2 (g) Is second order in NO2 and the rate constant at 660 K is 5.23 M-1s-1. The reaction half-life at this temperature when [NO2]0 = 0.45 M is ________ s.

Correct AnswerverifiedShow Answer

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.13 M, it takes ________ min for it to decrease to 0.085 M.

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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 overall order of the reaction?

Correct AnswerverifiedShow Answer

A flask is charged with 0.124 mol of A and allowed to react to form B according to the reaction A(g) →B(g) . The following data are obtained for [A] as the reaction proceeds: -How many moles of B are present at 10 s?

Correct AnswerverifiedShow Answer

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

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Which one of the following is not a valid expression for the rate of the reaction below? 4NH3 + 7O2 → 4NO2 + 6H2O

Correct AnswerverifiedShow Answer

The half-life of a first-order reaction is 13 min. If the initial concentration of reactant is 0.085 M, it takes ________ min for it to decrease to 0.055 M.

Correct AnswerverifiedShow Answer

Consider the following reaction: 3A → 2B The average rate of appearance of B is given by Δ[B]/Δt. Comparing the rate of appearance of B and the rate of disappearance of A, we get Δ[B]/Δt = ________ × (-Δ[A]/Δt) .

Correct AnswerverifiedShow Answer

________ are used in automotive catalytic converters.

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The rate constant for a particular zero-order reaction is 0.075 M s-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

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

The reaction A (aq) → B (aq) is first order in [A]. A solution is prepared with [A] = 1.22 M. The following data are obtained as the reaction proceeds: The rate constant for this reaction is ________ s-1.

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A reaction was found to be third order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to ________.

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The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) When the rate of disappearance of O2 is 0.13 M s-1, the rate of appearance of CO2 is ________ M s-1.

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Of the following, all are valid units for a reaction rate except ________.

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For a first-order reaction, a plot of ________ versus ________ is linear. A)ln [A]t, B)ln [A]t, t C) , t D)[A]t, t E)t,

Correct AnswerverifiedShow Answer

At elevated temperatures, methylisonitrile (CH3NC) isomerizes to acetonitrile (CH3CN) : CH3NC (g) → CH3CN (g) The dependence of the rate constant on temperature is studied and the graph below is prepared from the results. The energy of activation of this reaction is ________ kJ/mol.

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
verified

The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g) Is first order in CH₃NC. The half-life of the reaction is 2.70 × 10⁴ s at 463 K. The rate constant when the initial [CH₃NC] is 0.030 M is ________ s^-1.

Correct Answer
verified

The elementary reaction 2NO₂ (g) → 2NO (g) + O₂ (g) Is second order in NO₂ and the rate constant at 660 K is 5.23 M^-1s^-1. The reaction half-life at this temperature when [NO₂]₀ = 0.45 M is ________ s.

Correct Answer
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Correct Answer
verified

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 overall order of the reaction?

Correct Answer
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Correct Answer
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The concentration of S₂O₈^2- remaining at 400 s is ________ M.

Correct Answer
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Which one of the following is not a valid expression for the rate of the reaction below? 4NH₃ + 7O₂ → 4NO₂ + 6H₂O

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 rate constant for a particular zero-order reaction is 0.075 M s^-1. If the initial concentration of reactant is 0.537 M it takes ________ s for the concentration to decrease to 0.100 M.

Correct Answer
verified

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 Answer
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The reaction A (aq) → B (aq) is first order in [A]. A solution is prepared with [A] = 1.22 M. The following data are obtained as the reaction proceeds: The rate constant for this reaction is ________ s^-1.

Correct Answer
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Correct Answer
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The combustion of ethylene proceeds by the reaction C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.13 M s^-1, the rate of appearance of CO₂ is ________ M s^-1.

Correct Answer
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Correct Answer
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For a first-order reaction, a plot of versus is linear. A)ln [A]_t, B)ln [A]_t, t C) , t D)[A]_t, t E)t,

Correct Answer
verified

At elevated temperatures, methylisonitrile (CH₃NC) isomerizes to acetonitrile (CH₃CN) : CH₃NC (g) → CH₃CN (g) The dependence of the rate constant on temperature is studied and the graph below is prepared from the results. The energy of activation of this reaction is ________ kJ/mol.

Correct Answer
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