Question 1

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 2

The average rate of disappearance of I- in the initial 400.0 s is __________ M/s.

Accepted Answer

A)  6.00
B)  3.8 × 10-5
C)  1.4 × 10-4
D)  2.7 × 104
E)  3.2 × 10-4

Question 3

The average rate of disappearance of A between 20 s and 40 s is __________ mol/s.

Accepted Answer

A)  8.5 × 10-4
B)  1.7 × 10-3
C)  590
D)  7.1 × 10-3
E)  1.4 × 10-3

Question 4

The magnitude of the rate constant is __________.

Accepted Answer

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

Question 5

The following reaction is second order in [A] and the rate constant is 0.039 M-1s-1: A → B
The concentration of A was 0.30 M at 23 s. The initial concentration of A was __________ M.

Accepted Answer

A)  2.4
B)  0.27
C)  0.41
D)  3.7
E)  1.2 × 10-2

Question 6

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 7

Which energy difference in the energy profile below corresponds to the activation energy for the forward reaction?

Accepted Answer

A)  x
B)  y
C)  x + y
D)  x - y
E)  y - x

Question 8

Reaction rates are affected by reactant concentrations and temperature. This is accounted for by the __________.

Accepted Answer

The answer of Reaction rates are affected by reactant concentrations...

Question 9

The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) 
When the rate of disappearance of O2 is 0.23 Ms-1, the rate of disappearance of C2H4 is __________ Ms-1.

Accepted Answer

A)  0.15
B)  0.077
C)  0.69
D)  0.35
E)  0.46

Question 10

The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln) → 4NO2 (soln) + O2 (soln) 
The reaction is first order and has a rate constant of 4.82 × 10-3 s-1 at 64°C. The rate law for the reaction is rate = __________.

Accepted Answer

A)  k[N2O5]2
B)   2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln) → 4NO2 (soln) + O2 (soln)  The reaction is first order and has a rate constant of 4.82 × 10-3 s-1 at 64°C. The rate law for the reaction is rate = __________. 
A)  k[N2O5]2 
B)     
C)  k[N2O5] 
D)     
E)  2k[N2O5]" class="answers-bank-image d-inline" rel="preload" >
C)  k[N2O5]
D)   2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln) → 4NO2 (soln) + O2 (soln)  The reaction is first order and has a rate constant of 4.82 × 10-3 s-1 at 64°C. The rate law for the reaction is rate = __________. 
A)  k[N2O5]2 
B)     
C)  k[N2O5] 
D)     
E)  2k[N2O5]" class="answers-bank-image d-inline" rel="preload" >
E)  2k[N2O5]

Exam 14: Chemical Kinetics

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

Correct Answer
verified

The magnitude of the rate constant is __________.

Correct Answer
verified

The average rate of disappearance of I^- in the initial 400.0 s is __________ M/s.

Correct Answer
verified

The following reaction is second order in [A] and the rate constant is 0.039 M^-1s^-1: A → B The concentration of A was 0.30 M at 23 s. The initial concentration of A was __________ M.

Correct Answer
verified

The average rate of disappearance of A between 20 s and 40 s is __________ mol/s.

Correct Answer
verified

The decomposition of N₂O₅ in solution in carbon tetrachloride proceeds via the reaction 2N₂O₅(soln) → 4NO₂(soln) + O₂(soln) The reaction is first order and has a rate constant of 4.82 × 10^-3 s^-1 at 64°C. The rate law for the reaction is rate = __________.

Correct Answer
verified

The combustion of ethylene proceeds by the reaction C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.23 Ms^-1, the rate of disappearance of C₂H₄ is __________ Ms^-1.

Correct Answer
verified

Reaction rates are affected by reactant concentrations and temperature. This is accounted for by the __________.

Correct Answer
verified

Which energy difference in the energy profile below corresponds to the activation energy for the forward reaction?

Correct Answer
verified

Exam 14: Chemical Kinetics

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 AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The magnitude of the rate constant is __________.

Correct AnswerverifiedShow Answer

The average rate of disappearance of I- in the initial 400.0 s is __________ M/s.

Correct AnswerverifiedShow Answer

The following reaction is second order in [A] and the rate constant is 0.039 M-1s-1: A → B The concentration of A was 0.30 M at 23 s. The initial concentration of A was __________ M.

Correct AnswerverifiedShow Answer

The average rate of disappearance of A between 20 s and 40 s is __________ mol/s.

Correct AnswerverifiedShow Answer

The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln) → 4NO2 (soln) + O2 (soln) The reaction is first order and has a rate constant of 4.82 × 10-3 s-1 at 64°C. The rate law for the reaction is rate = __________.

Correct AnswerverifiedShow Answer

The combustion of ethylene proceeds by the reaction C2H4 (g) + 3O2 (g) → 2CO2 (g) + 2H2O (g) When the rate of disappearance of O2 is 0.23 Ms-1, the rate of disappearance of C2H4 is __________ Ms-1.

Correct AnswerverifiedShow Answer

Reaction rates are affected by reactant concentrations and temperature. This is accounted for by the __________.

Correct AnswerverifiedShow Answer

Which energy difference in the energy profile below corresponds to the activation energy for the forward reaction?

Correct AnswerverifiedShow Answer

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

The average rate of disappearance of I^- in the initial 400.0 s is __________ M/s.

Correct Answer
verified

The following reaction is second order in [A] and the rate constant is 0.039 M^-1s^-1: A → B The concentration of A was 0.30 M at 23 s. The initial concentration of A was __________ M.

Correct Answer
verified

Correct Answer
verified

The decomposition of N₂O₅ in solution in carbon tetrachloride proceeds via the reaction 2N₂O₅(soln) → 4NO₂(soln) + O₂(soln) The reaction is first order and has a rate constant of 4.82 × 10^-3 s^-1 at 64°C. The rate law for the reaction is rate = __________.

Correct Answer
verified

The combustion of ethylene proceeds by the reaction C₂H₄ (g) + 3O₂ (g) → 2CO₂ (g) + 2H₂O (g) When the rate of disappearance of O₂ is 0.23 Ms^-1, the rate of disappearance of C₂H₄ is __________ Ms^-1.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified