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 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]

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

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 6

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 7

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 8

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 9

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 10

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...

Exam 14: Chemical Kinetics

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 I^- in the initial 400.0 s is __________ M/s.

Correct Answer
verified

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

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

The magnitude of the rate constant is __________.

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

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 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

Exam 14: Chemical Kinetics

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 I- in the initial 400.0 s is __________ M/s.

Correct AnswerverifiedShow Answer

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

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

The magnitude of the rate constant is __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

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.

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 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 I^- in the initial 400.0 s is __________ M/s.

Correct Answer
verified

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

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

Correct Answer
verified

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