Question 1

What is the order of the reaction in A?

Accepted Answer

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

Question 2

The reaction below is first order in [H2O2]: 2H2O2 (l)→ 2H2O (l)+ O2 (g)
A solution originally at 0.600 M H2O2 is found to be 0.075 M after 54 min.The half-life for this reaction is ________ min.

Accepted Answer

A) 6.8 
B) 18 
C) 14 
D) 28 
E) 54 
A) 6.8 
B) 18 
C) 14 
D) 28 
E) 54

Question 3

The rate limiting step in a reaction is the slowest step in the reaction sequence.

Accepted Answer

A) True 
 B)False

Question 4

The rate law of a reaction is rate = k[D][X].The units of the rate constant are ________.

Accepted Answer

A) mol L-1s-1 
B) L mol-1s-1 
C) mol2 L-2s-1 
D) mol L-1s-2 
E) L2 mol-2s-1 
A) mol L-1s-1 
B) L mol-1s-1 
C) mol2 L-2s-1 
D) mol L-1s-2 
E) L2 mol-2s-1

Question 5

The rate of a second order reaction can depend on the concentrations of more than one reactant.

Accepted Answer

A) True 
 B)False

Question 6

What is the order of the reaction with respect to ClO2?

Accepted Answer

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

Question 7

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

Accepted Answer

A) 2.63 
B) 0.095 
C) 0.0361 
D) 0.380 
E) 0.436 
A) 2.63 
B) 0.095 
C) 0.0361 
D) 0.380 
E) 0.436

Question 8

For a zero-order reaction,a plot of ________ versus ________ is linear.

Accepted Answer

A) ln [A]t,   
B) [A]t, t 
C) ln [A]t, t 
D)    , t 
E) t,   
A) ln [A]t,   
B) [A]t, t 
C) ln [A]t, t 
D)    , t 
E) t,

Question 9

Biological catalysts are referred to as ________.

Accepted Answer

The answer of Biological catalysts are referred to as ________....

Question 10

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.

Accepted Answer

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

Question 11

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

Question 12

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

Accepted Answer

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

Question 13

The initial concentration of reactant in a first-order reaction is 0.27 M and has a rate constant of   What is the concentration (mol/L)of reactant after

Accepted Answer

A) 0.99 
B) 1.7 
C) 0.074 
D) 0.15 
E) 0.47 
A) 0.99 
B) 1.7 
C) 0.074 
D) 0.15 
E) 0.47

Question 14

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

Accepted Answer

A) -     
B)      
C)      
D) -     
E) All of the above are valid expressions of the reaction rate. 
A) -     
B)      
C)      
D) -     
E) All of the above are valid expressions of the reaction rate.

Question 15

At elevated temperatures,dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N2O5(g)→ 4NO2 (g)+ O2 (g)
When the rate of formation of O2 is 3.6 × 10-3 M/s,the rate of decomposition of N2O5 is

Accepted Answer

A) 4.4 × 10-4 
B) 3.6 × 10-3 
C) 1.8 × 10-3 
D) 1.4 × 10-2 
E) 0.00090 
A) 4.4 × 10-4 
B) 3.6 × 10-3 
C) 1.8 × 10-3 
D) 1.4 × 10-2 
E) 0.00090

Question 16

The decomposition of     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 ×     at 64 °C.If the reaction is initiated with 0.072 mol in a 1.00-L vessel,how many moles remain after 151 s?

Accepted Answer

A) 0.067 
B) 0.074 
C) 0.035 
D) 9.6 
E) 1.6 ×   
A) 0.067 
B) 0.074 
C) 0.035 
D) 9.6 
E) 1.6 ×

Question 17

The overall order of a reaction is 2.The units of the rate constant for the reaction are ________.

Accepted Answer

A) M/s 
B) M-1s-1 
C) 1/s 
D) 1/M 
E) s/M2 
A) M/s 
B) M-1s-1 
C) 1/s 
D) 1/M 
E) s/M2

Question 18

In general,as temperature goes up,reaction rate ________.

Accepted Answer

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

Question 19

The reaction A → B is first order in [A].Consider the following data.   What is the half-life,in seconds,of this reaction?

Accepted Answer

A) 5.0 
B) 0.97 
C) 7.1 
D) 3.0 
E) 0.14 
A) 5.0 
B) 0.97 
C) 7.1 
D) 3.0 
E) 0.14

Question 20

In the energy profile of a reaction,the species that exists at the maximum on the curve is called the ________.

Accepted Answer

A) product 
B) activated complex 
C) activation energy 
D) enthalpy of reaction 
E) atomic state 
A) product 
B) activated complex 
C) activation energy 
D) enthalpy of reaction 
E) atomic state

Exam 14: Chemical Kinetics

What is the order of the reaction in A?

The reaction below is first order in [H2O2]: 2H2O2 (l)→ 2H2O (l)+ O2 (g) A solution originally at 0.600 M H2O2 is found to be 0.075 M after 54 min.The half-life for this reaction is ________ min.

The rate limiting step in a reaction is the slowest step in the reaction sequence.

The rate law of a reaction is rate = k[D][X].The units of the rate constant are ________.

The rate of a second order reaction can depend on the concentrations of more than one reactant.

What is the order of the reaction with respect to ClO2?

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

For a zero-order reaction,a plot of ________ versus ________ is linear.

Biological catalysts are referred to as ________.

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.

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

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

The initial concentration of reactant in a first-order reaction is 0.27 M and has a rate constant of What is the concentration (mol/L)of reactant after

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

At elevated temperatures,dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N2O5(g)→ 4NO2 (g)+ O2 (g) When the rate of formation of O2 is 3.6 × 10-3 M/s,the rate of decomposition of N2O5 is

The decomposition of 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 × at 64 °C.If the reaction is initiated with 0.072 mol in a 1.00-L vessel,how many moles remain after 151 s?

The overall order of a reaction is 2.The units of the rate constant for the reaction are ________.

In general,as temperature goes up,reaction rate ________.

The reaction A → B is first order in [A].Consider the following data. What is the half-life,in seconds,of this reaction?

In the energy profile of a reaction,the species that exists at the maximum on the curve is called the ________.

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

The reaction below is first order in [H₂O₂]: 2H₂O₂ (l)→ 2H₂O (l)+ O₂ (g) A solution originally at 0.600 M H₂O₂ is found to be 0.075 M after 54 min.The half-life for this reaction is ________ min.

What is the order of the reaction with respect to ClO₂?

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

For a zero-order reaction,a plot of versus is linear.

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.

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

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

At elevated temperatures,dinitrogen pentoxide decomposes to nitrogen dioxide and oxygen: 2N₂O₅(g)→ 4NO₂(g)+ O₂ (g) When the rate of formation of O₂ is 3.6 × 10^-3 M/s,the rate of decomposition of N₂O₅ is