Question 1

The elementary reaction
2NO2 (g)  → 2NO (g)  + O2 (g) 
Is second order in NO2 and the rate constant at 501 K is 7.93 × 10- 3 M- 1s- 1. The reaction half- life at this temperature when [NO2]0 = 0.450 M is s.

Accepted Answer

A)   126
B)   0.011
C)   3.6 × 10- 3 
D)   280
E)   87F) C) and D)
G) All of the above

Question 2

The primary source of the specificity of enzymes is .

Accepted Answer

A)   their polarity, which matches that of their specific substrate
B)   their locations within the cell
C)   their shape, which relates to the lock- and- key model
D)   their bonded transition metal, which is specific to the target substrate
E)   their delocalized electron cloudF) All of the above
G) C) and D)

Question 3

The isomerization of methylisonitrile to acetonitrile CH3NC (g)  → CH3CN (g) 
Is first order in CH3NC. The half life of the reaction is 1.60 × 105 s at 444 K. The rate constant when the initial [CH3NC] is 0.030 M is _ s- 1.

Accepted Answer

A)   2.08 × 10- 4
B)   4.80 × 103
C)   7.10 × 107
D)   2.31 × 105
E)   4.33 × 10- 6F) A) and B)
G) B) and E)

Question 4

At elevated temperatures, methylisonitrile (CH3NC)  isomerizes to acetonitrile (CH3CN) :
CH3NC (g)   →  CH3CN (g) 
At the start of the experiment, there are 0.200 mol of reactant (CH3NC)  and 0 mol of product (CH3CN)  in the reaction vessel. After 25 min of reaction, 0.108 mol of reactant (CH3NC)  remain. The average rate of decomposition of methyl isonitrile, CH3NC, in this 25 min period is mol/min.

Accepted Answer

A)   0.54
B)   3.7 × 10- 3 
C)   4.3 × 10- 3 
D)   0.092
E)   2.3F) C) and D)
G) B) and C)

Question 5

The reaction A - B is first order in [A]. Consider the following data. - 1. A)  0.46 B)  14 C)  3.0 × 10- 2  D)  4.0 × 102  E)  6.9 × 10- 2" class="answers-bank-image d-inline" rel="preload" >
-The rate constant for this reaction is s- 1.

Accepted Answer

A)   0.46
B)   14
C)   3.0 × 10- 2 
D)   4.0 × 102 
E)   6.9 × 10- 2F) C) and D)
G) None of the above

Question 6

If the rate law for the reaction 2[B]2  B)  k[A][B] C)  k[A][B]2  D)  k[A]2[B]3  E)  k[A]2[B]" class="answers-bank-image d-inline" rel="preload" > is first order in A and second order in B, then the rate law is rate = .

Accepted Answer

A)   k[A]2[B]2 
B)   k[A][B]
C)   k[A][B]2 
D)   k[A]2[B]3 
E)   k[A]2[B]F) B) and E)
G) A) and B)

Question 7

The number of molecules that participate as reactants defines the of the reaction.

Accepted Answer

The answer of The number of molecules that participate as...

Question 8

The combustion of ethylene proceeds by the reaction C2H4 (g)  + 3O2 (g)  →2CO2 (g)  + 2H2O (g) 
When the rate of disappearance of O2 is 0.28 M s- 1, the rate of appearance of CO2 is _ _ M s- 1.

Accepted Answer

A)   0.84
B)   0.42
C)   0.56
D)   0.093
E)   0.19F) A) and B)
G) D) and E)

Question 9

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 10

The relationship of absorbed light to the concentration of the substance absorbing the light is governed by .

Accepted Answer

The answer of The relationship of absorbed light to the...

Question 11

SO2Cl2 decomposes in the gas phase by the reaction SO2Cl2 (g)  →SO2 (g)  + Cl2 (g) 
The reaction is first order in SO2Cl2 and the rate constant is 3.0 × 10- 6 s- 1at 600 K. A vessel is charged with 2.4 atm of SO2Cl2 at 600 K. The partial pressure of SO2Cl2 at 3.0 × 105 s is
Atm)

Accepted Answer

A)   1.4 × 105 
B)   0.76
C)   0.29
D)   2.2
E)   0.98F) B) and E)
G) B) and C)

Question 12

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

Accepted Answer

A)   0
B)   1
C)   2
D)   3
E)   4F) D) and E)
G) B) and E)

Question 13

The minimum energy to initiate a chemical reaction is the .

Accepted Answer

The answer of The minimum energy to initiate a chemical...

Question 14

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

Accepted Answer

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

Question 15

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  D)  0.014 E)  0.011" class="answers-bank-image d-inline" rel="preload" >
-How many moles of B are present at 10 s?

Accepted Answer

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

Question 16

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: - 4 B)  +1.5 × 10- 3 C)  - 1.5 × 10- 3 D)  - 7.3 × 10- 3 E)  +7.3 × 10- 3" class="answers-bank-image d-inline" rel="preload" >
-The average rate of appearance of B between 20 s and 30 s is mol/s.

Accepted Answer

A)   +5.0 × 10- 4
B)   +1.5 × 10- 3
C)   - 1.5 × 10- 3
D)   - 7.3 × 10- 3
E)   +7.3 × 10- 3F) B) and E)
G) A) and C)

Question 17

Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction:
2NO2 → 2NO + O2
In a particular experiment at 300°C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The rate of disappearance of NO2 for this period is _ M/s.

Accepted Answer

A)   0.35
B)   1.8 × 10- 3 
C)   3.5 × 10- 3 
D)   7.0 × 10- 3 
E)   3.5 × 10- 5F) A) and B)
G) C) and D)

Question 18

The rate of a reaction depends on _.

Accepted Answer

A)   collision frequency
B)   collision orientation
C)   collision energy
D)   all of the above
E)   none of the aboveF) A) and C)
G) A) and D)

Question 19

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

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   0F) B) and D)
G) C) and E)

Question 20

The average rate disappearance of A between 20 s and 30 s is mol/s.

Accepted Answer

A)   5.0 × 10- 4
B)   0.15
C)   1.6 × 10- 2
D)   670
E)   1.5 × 10- 3F) A) and B)
G) B) and C)

Exam 14: Chemical Kinetics

The isomerization of methylisonitrile to acetonitrile CH₃NC (g) → CH₃CN (g) Is first order in CH₃NC. The half life of the reaction is 1.60 × 10⁵s at 444 K. The rate constant when the initial [CH₃NC] is 0.030 M is _ s^-¹.

Correct Answer
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The elementary reaction 2NO₂(g) → 2NO (g) + O₂(g) Is second order in NO₂and the rate constant at 501 K is 7.93 × 10^-³M^-¹s^-¹. The reaction half- life at this temperature when [NO₂]₀= 0.450 M is s.

Correct Answer
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SO₂Cl₂decomposes in the gas phase by the reaction SO₂Cl₂(g) →SO₂(g) + Cl₂(g) The reaction is first order in SO₂Cl₂and the rate constant is 3.0 × 10^-⁶s^-¹at 600 K. A vessel is charged with 2.4 atm of SO₂Cl₂at 600 K. The partial pressure of SO₂Cl₂at 3.0 × 10⁵s is Atm)

Correct Answer
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The reaction A - B is first order in [A]. Consider the following data. -The rate constant for this reaction is s^-¹.

Correct Answer
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The average rate disappearance of A between 20 s and 30 s is mol/s.

Correct Answer
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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
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The minimum energy to initiate a chemical reaction is the .

Correct Answer
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The relationship of absorbed light to the concentration of the substance absorbing the light is governed by .

Correct Answer
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The rate of a reaction depends on _.

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

Correct Answer
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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: -The average rate of appearance of B between 20 s and 30 s is mol/s.

Correct Answer
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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 order of the reaction with respect to OH^-?

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

Correct Answer
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If the rate law for the reaction is first order in A and second order in B, then the rate law is rate = .

Correct Answer
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Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO₂→ 2NO + O₂ In a particular experiment at 300°C, [NO₂] drops from 0.0100 to 0.00650 M in 100 s. The rate of disappearance of NO₂for this period is _ M/s.

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 O₂is 0.28 M s^-¹, the rate of appearance of CO₂is _ _ M s^-¹.

Correct Answer
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The primary source of the specificity of enzymes is .

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

Correct Answer
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The number of molecules that participate as reactants defines the of the reaction.

Correct Answer
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Exam 14: Chemical Kinetics

The isomerization of methylisonitrile to acetonitrile CH3NC (g) → CH3CN (g) Is first order in CH3NC. The half life of the reaction is 1.60 × 105 s at 444 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 501 K is 7.93 × 10- 3 M- 1s- 1. The reaction half- life at this temperature when [NO2]0 = 0.450 M is s.

Correct AnswerverifiedShow Answer

SO2Cl2 decomposes in the gas phase by the reaction SO2Cl2 (g) →SO2 (g) + Cl2 (g) The reaction is first order in SO2Cl2 and the rate constant is 3.0 × 10- 6 s- 1at 600 K. A vessel is charged with 2.4 atm of SO2Cl2 at 600 K. The partial pressure of SO2Cl2 at 3.0 × 105 s is Atm)

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The reaction A - B is first order in [A]. Consider the following data. -The rate constant for this reaction is s- 1.

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The average rate disappearance of A between 20 s and 30 s is mol/s.

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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?

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The minimum energy to initiate a chemical reaction is the .

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The relationship of absorbed light to the concentration of the substance absorbing the light is governed by .

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The rate of a reaction depends on _.

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

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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: -The average rate of appearance of B between 20 s and 30 s is mol/s.

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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 order of the reaction with respect to OH- ?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

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If the rate law for the reaction is first order in A and second order in B, then the rate law is rate = .

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Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO2 → 2NO + O2 In a particular experiment at 300°C, [NO2] drops from 0.0100 to 0.00650 M in 100 s. The rate of disappearance of NO2 for this period is _ M/s.

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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 0.28 M s- 1, the rate of appearance of CO2 is _ _ M s- 1.

Correct AnswerverifiedShow Answer

The primary source of the specificity of enzymes is .

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The number of molecules that participate as reactants defines the of the reaction.

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 1.60 × 10⁵s at 444 K. The rate constant when the initial [CH₃NC] is 0.030 M is _ s^-¹.

Correct Answer
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The elementary reaction 2NO₂(g) → 2NO (g) + O₂(g) Is second order in NO₂and the rate constant at 501 K is 7.93 × 10^-³M^-¹s^-¹. The reaction half- life at this temperature when [NO₂]₀= 0.450 M is s.

Correct Answer
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Correct Answer
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The reaction A - B is first order in [A]. Consider the following data. -The rate constant for this reaction is s^-¹.

Correct Answer
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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 order of the reaction with respect to OH^-?

Correct Answer
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Nitrogen dioxide decomposes to nitric oxide and oxygen via the reaction: 2NO₂→ 2NO + O₂ In a particular experiment at 300°C, [NO₂] drops from 0.0100 to 0.00650 M in 100 s. The rate of disappearance of NO₂for this period is _ M/s.

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 O₂is 0.28 M s^-¹, the rate of appearance of CO₂is _ _ M s^-¹.

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