Question 1

How are the exponents in a rate law determined?

Accepted Answer

A)   They are equal to the inverse of the coefficients in the overall balanced chemical equation.
B)   They are determined by experimentation.
C)   They are equal to the coefficients in the overall balanced chemical equation.
D)   They are equal to the reactant concentrations.
E)   They are equal to the ln(2) divided by the rate constant.F) All of the above
G) B) and E)

Question 2

The reaction of NO and O2 produces NO2. 2 NO(g) + O2(g) → 2 NO2(g) 
The reaction is second-order with respect to NO(g) and first-order with respect to O2(g) .At a given temperature,the rate constant,k,equals 4.7 × 102 M-2s-1.What is the rate of reaction when the initial concentrations of NO and O2 are 0.025 M and 0.015 M,respectively?

Accepted Answer

A)   2.6 × 10-3 M/s
B)   4.4 × 10-3 M/s
C)   0.18 M/s
D)   2.0 × 10-8 M/s
E)   3.8 × 102 M/sF) A) and D)
G) B) and C)

Question 3

For a certain overall second-order reaction with the general form aA → products,the initial rate of reaction is 0.50 M·s−1 when the initial concentration of the reactant is 0.27 M.What is the rate constant for this reaction?

Accepted Answer

A)   0.039 M-1·s−1
B)   6.9 M-1·s−1
C)   0.50 M-1·s−1
D)   0.54 M-1·s−1
E)   25 M-1·s−1F) A) and E)
G) None of the above

Question 4

Carbon dating may be used to date (once living)materials that are between 100 and 40,000 years old.The half-life of the first-order decay of carbon-14 is 5730 years.What percentage of carbon-14 remains in a sample after 40,000 years.

Accepted Answer

The answer of Carbon dating may be used to date...

Question 5

What is the half-life of the first-order reaction if it takes 4.4 × 10-2 seconds for a concentration to decrease from 0.50 M to 0.20 M?

Accepted Answer

A)   2.5 × 10-2 s
B)   3.3 × 10-2 s
C)   1.6 s
D)   21 s
E)   27 sF) B) and C)
G) A) and E)

Question 6

A suggested mechanism for the decomposition of ozone is as follows: O3 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? A)  Rate =   B)  Rate = k2[O] [O3] C)  Rate =   D)  Rate =   E)  Rate =  " class="answers-bank-image d-inline" rel="preload" > O2 + O fast equilibrium
O + O3 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? A)  Rate =   B)  Rate = k2[O] [O3] C)  Rate =   D)  Rate =   E)  Rate =  " class="answers-bank-image d-inline" rel="preload" > 2O2 slow step
What is the rate law predicted by this mechanism?

Accepted Answer

A)   Rate = 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? 
A)   Rate =   
B)   Rate = k2[O] [O3] 
C)   Rate =   
D)   Rate =   
E)   Rate =  " class="answers-bank-image d-inline" rel="preload" >
B)   Rate = k2[O] [O3]
C)   Rate = 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? 
A)   Rate =   
B)   Rate = k2[O] [O3] 
C)   Rate =   
D)   Rate =   
E)   Rate =  " class="answers-bank-image d-inline" rel="preload" >
D)   Rate = 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? 
A)   Rate =   
B)   Rate = k2[O] [O3] 
C)   Rate =   
D)   Rate =   
E)   Rate =  " class="answers-bank-image d-inline" rel="preload" >
E)   Rate = 3   O2 + O fast equilibrium O + O3   2O2 slow step What is the rate law predicted by this mechanism? 
A)   Rate =   
B)   Rate = k2[O] [O3] 
C)   Rate =   
D)   Rate =   
E)   Rate =  " class="answers-bank-image d-inline" rel="preload" >F) D) and E)
G) A) and B)

Question 7

Given the initial rate data for the decomposition reaction, A → B + C
Determine the rate expression for the reaction.
[A],M
-Δ[A]/Δt M/s
0) 084
12) 4 × 10-6
0) 063
9) 3 × 10-6
0) 042
6) 2 × 10-6

Accepted Answer

A)   -6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
B)   -6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
C)   -6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
D)   -6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >
E)   -6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6 
A)     
B)     
C)     
D)     
E)    " class="answers-bank-image d-inline" rel="preload" >F) B) and C)
G) A) and B)

Question 8

For a chemical reaction,the activation energy for the forward reaction is +181 kJ and the activation energy for the backward reaction is +62 kJ.What is the net energy change for the forward reaction?

Accepted Answer

A)   -119 kJ
B)   -62 kJ
C)   +119 kJ
D)   +181 kJ
E)   +243 kJF) A) and B)
G) A) and C)

Question 9

Which of the following steps must occur for an enzyme to catalyze a reaction?

Accepted Answer

A)   The reactant,often called the substrate,must bind to the enzyme.
B)   The chemical reaction must be halted.
C)   The products of the reaction must attach to the enzyme.
D)   The quantity of the enzymes in the reaction should keep increasing.
E)   The reactant must bind to the product rather than the enzyme.F) A) and B)
G) A) and C)

Question 10

The average rate of disappearance of ozone in the following reaction is found to be 7.01 × 10-3 atm/s. -3 atm/s.   What is the rate of appearance of   during this interval? A)  4.67 × 10-3 atm/s B)  7.01 × 10-3 atm/s C)  16.4 × 10-3 atm/s D)  172 × 10-3 atm/s E)  10.5 × 10-3 atm/s" class="answers-bank-image d-inline" rel="preload" > What is the rate of appearance of -3 atm/s.   What is the rate of appearance of   during this interval? A)  4.67 × 10-3 atm/s B)  7.01 × 10-3 atm/s C)  16.4 × 10-3 atm/s D)  172 × 10-3 atm/s E)  10.5 × 10-3 atm/s" class="answers-bank-image d-inline" rel="preload" > during this interval?

Accepted Answer

A)   4.67 × 10-3 atm/s
B)   7.01 × 10-3 atm/s
C)   16.4 × 10-3 atm/s
D)   172 × 10-3 atm/s
E)   10.5 × 10-3 atm/sF) All of the above
G) B) and E)

Question 11

At a given temperature,a first-order reaction has a rate constant of 2.1 × 10-3 s-1.How long will it take for the reaction to be 25% complete?

Accepted Answer

A)   660 s
B)   2100 s
C)   1500 s
D)   59 s
E)   140 sF) B) and E)
G) D) and E)

Question 12

The pre-exponential,A,in the Arrhenius equation is called the ________ factor.

Accepted Answer

The answer of The pre-exponential,A,in the Arrhenius equation is called...

Exam 15: Chemical Kinetics: the Rates of Chemical Reactions

For a certain overall second-order reaction with the general form aA → products,the initial rate of reaction is 0.50 M·s−1 when the initial concentration of the reactant is 0.27 M.What is the rate constant for this reaction?

Correct Answer
verified

Carbon dating may be used to date (once living)materials that are between 100 and 40,000 years old.The half-life of the first-order decay of carbon-14 is 5730 years.What percentage of carbon-14 remains in a sample after 40,000 years.

Correct Answer
verified

Which of the following steps must occur for an enzyme to catalyze a reaction?

Correct Answer
verified

The average rate of disappearance of ozone in the following reaction is found to be 7.01 × 10^-3 atm/s. What is the rate of appearance of during this interval?

Correct Answer
verified

For a chemical reaction,the activation energy for the forward reaction is +181 kJ and the activation energy for the backward reaction is +62 kJ.What is the net energy change for the forward reaction?

Correct Answer
verified

The pre-exponential,A,in the Arrhenius equation is called the ________ factor.

Correct Answer
verified

What is the half-life of the first-order reaction if it takes 4.4 × 10^-2 seconds for a concentration to decrease from 0.50 M to 0.20 M?

Correct Answer
verified

A suggested mechanism for the decomposition of ozone is as follows: O₃ O₂ + O fast equilibrium O + O₃ 2O₂ slow step What is the rate law predicted by this mechanism?

Correct Answer
verified

Correct Answer
verified

How are the exponents in a rate law determined?

Correct Answer
verified

Given the initial rate data for the decomposition reaction, A → B + C Determine the rate expression for the reaction. [A],M -Δ[A]/Δt M/s 0) 084 12) 4 × 10^-6 0) 063 9) 3 × 10^-6 0) 042 6) 2 × 10^-6

Correct Answer
verified

At a given temperature,a first-order reaction has a rate constant of 2.1 × 10^-3 s^-1.How long will it take for the reaction to be 25% complete?

Correct Answer
verified

Exam 15: Chemical Kinetics: the Rates of Chemical Reactions

For a certain overall second-order reaction with the general form aA → products,the initial rate of reaction is 0.50 M·s−1 when the initial concentration of the reactant is 0.27 M.What is the rate constant for this reaction?

Correct AnswerverifiedShow Answer

Carbon dating may be used to date (once living)materials that are between 100 and 40,000 years old.The half-life of the first-order decay of carbon-14 is 5730 years.What percentage of carbon-14 remains in a sample after 40,000 years.

Correct AnswerverifiedShow Answer

Which of the following steps must occur for an enzyme to catalyze a reaction?

Correct AnswerverifiedShow Answer

The average rate of disappearance of ozone in the following reaction is found to be 7.01 × 10-3 atm/s. What is the rate of appearance of during this interval?

Correct AnswerverifiedShow Answer

For a chemical reaction,the activation energy for the forward reaction is +181 kJ and the activation energy for the backward reaction is +62 kJ.What is the net energy change for the forward reaction?

Correct AnswerverifiedShow Answer

The pre-exponential,A,in the Arrhenius equation is called the ________ factor.

Correct AnswerverifiedShow Answer

What is the half-life of the first-order reaction if it takes 4.4 × 10-2 seconds for a concentration to decrease from 0.50 M to 0.20 M?

Correct AnswerverifiedShow Answer

A suggested mechanism for the decomposition of ozone is as follows: O3 O2 + O fast equilibrium O + O3 2O2 slow step What is the rate law predicted by this mechanism?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

How are the exponents in a rate law determined?

Correct AnswerverifiedShow Answer

Given the initial rate data for the decomposition reaction, A → B + C Determine the rate expression for the reaction. [A],M -Δ[A]/Δt M/s 0) 084 12) 4 × 10-6 0) 063 9) 3 × 10-6 0) 042 6) 2 × 10-6

Correct AnswerverifiedShow Answer

At a given temperature,a first-order reaction has a rate constant of 2.1 × 10-3 s-1.How long will it take for the reaction to be 25% complete?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The average rate of disappearance of ozone in the following reaction is found to be 7.01 × 10^-3 atm/s. What is the rate of appearance of during this interval?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the half-life of the first-order reaction if it takes 4.4 × 10^-2 seconds for a concentration to decrease from 0.50 M to 0.20 M?

Correct Answer
verified

A suggested mechanism for the decomposition of ozone is as follows: O₃ O₂ + O fast equilibrium O + O₃ 2O₂ slow step What is the rate law predicted by this mechanism?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Given the initial rate data for the decomposition reaction, A → B + C Determine the rate expression for the reaction. [A],M -Δ[A]/Δt M/s 0) 084 12) 4 × 10^-6 0) 063 9) 3 × 10^-6 0) 042 6) 2 × 10^-6

Correct Answer
verified

At a given temperature,a first-order reaction has a rate constant of 2.1 × 10^-3 s^-1.How long will it take for the reaction to be 25% complete?

Correct Answer
verified