At elevated temperatures,nitrogen dioxide decomposes to nitrogen oxide and oxygen: NO2 (g)→ NO (g)+ O2 (g) The reaction is second order in NO2 with a rate constant of 0.543 M-1s-1at If the initial [NO2] is it will take ________ s for the concentration to drop to

A) 3.34 B) 0.0880 C) 2.29 D) 0.299 E) 17.5 A) 3.34 B) 0.0880 C) 2.29 D) 0.299 E) 17.5

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)→ H2 (g)+ Br2 (g) Is 0.140 M at 150 °C.The rate of reaction is ________ M .

A) 3.57 B) 0.0700 C) 0.0196 D) 0.280 E) 0.0860 A) 3.57 B) 0.0700 C) 0.0196 D) 0.280 E) 0.0860

The combustion of ethylene proceeds by the reaction C2H4 (g)+ 3O2 (g)→ 2CO2 (g)+ 2H2O (g) When the rate of disappearance of O2 is 0.13 M ,the rate of disappearance of C2H4 is ________

A) 0.087 B) 0.043 C) 0.39 D) 0.20 E) 0.26 A) 0.087 B) 0.043 C) 0.39 D) 0.20 E) 0.26

Exam 14: Chemical Kinetics

At elevated temperatures,nitrogen dioxide decomposes to nitrogen oxide and oxygen: NO₂(g)→ NO (g)+ O₂(g) The reaction is second order in NO₂ with a rate constant of 0.543 M^-1s^-1at If the initial [NO₂] is it will take ________ s for the concentration to drop to

(Multiple Choice)

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Question 61

What is the concentration (M)of [A] after 80.0 s?

(Multiple Choice)

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Question 62

The graph shown below depicts the relationship between concentration and time for the following chemical reaction. The slope of this line is equal to ________.

(Multiple Choice)

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Question 63

The overall reaction order is the sum of the orders of each reactant in the rate law.

(True/False)

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Question 64

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)→ H₂ (g)+ Br₂ (g) Is 0.140 M at 150 °C.The rate of reaction is ________ M .

(Multiple Choice)

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Question 65

________ are used in automotive catalytic converters.

(Multiple Choice)

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Question 66

The instantaneous rate of a reaction can be read directly from the graph of molarity versus time at any point on the graph.

(True/False)

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Question 67

The combustion of ethylene proceeds by the reaction C₂H₄ (g)+ 3O₂ (g)→ 2CO₂ (g)+ 2H₂O (g) When the rate of disappearance of O₂ is 0.13 M ,the rate of disappearance of C₂H₄ is ________

(Multiple Choice)

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Question 68

In general,as activation energy increases,reaction rate ________.

(Multiple Choice)

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Question 69

At elevated temperatures,methylisonitrile (CH₃NC)isomerizes to acetonitrile (CH₃CN): CH₃NC (g)→ CH₃CN (g) At the start of an experiment,there are 0.200 mol of reactant and 0 mol of product in the reaction vessel.After 25 min,0.121 mol of reactant (CH₃NC)remain.There are ________ mol of product (CH₃CN)in the reaction vessel.

(Multiple Choice)

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Question 70

What is the magnitude of the rate constant for the reaction?

(Multiple Choice)

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Question 71

The reaction A → B is first order in [A].Consider the following data. The rate constant for this reaction is ________ .

(Multiple Choice)

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Question 72

As the temperature of a reaction is increased,the rate of the reaction increases because the ________.

(Multiple Choice)

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Question 73

The reaction 2NOBr (g)→ 2 NO (g)+ Br₂ (g) Is a second-order reaction with a rate constant of 0.80 M^-1s^-1at 11 °C.If the initial concentration of NOBr is 0.0440 M,the concentration of NOBr after 6.0 seconds is ________.

(Multiple Choice)

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Question 74

What is the order of the reaction with respect to OH^-?

(Multiple Choice)

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Question 75

The half-life for a first order rate law depends on the starting concentration.

(True/False)

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Question 76

At elevated temperatures,methylisonitrile (CH₃NC)isomerizes to acetonitrile (CH₃CN): CH₃NC (g)→ CH₃CN (g) The reaction is first order in methylisonitrile.The attached graph shows data for the reaction obtained at 198.9 °C. What is the rate constant (s^-1)for the reaction?

(Multiple Choice)

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Question 77

It was determined experimentally that the reaction rate doubled when the concentration of B was doubled in the following reaction: A + B → C The reaction is ________ order in B.

(Multiple Choice)

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Question 78

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

(Multiple Choice)

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Question 79

The overall reaction below is and the elementary reaction is considered . AB → A + B

(Multiple Choice)

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Question 80

Showing 61 - 80 of 134

Exam 14: Chemical Kinetics

At elevated temperatures,nitrogen dioxide decomposes to nitrogen oxide and oxygen: NO2 (g)→ NO (g)+ O2 (g) The reaction is second order in NO2 with a rate constant of 0.543 M-1s-1at If the initial [NO2] is it will take ________ s for the concentration to drop to

What is the concentration (M)of [A] after 80.0 s?

The graph shown below depicts the relationship between concentration and time for the following chemical reaction. The slope of this line is equal to ________.

The overall reaction order is the sum of the orders of each reactant in the rate law.

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)→ H2 (g)+ Br2 (g) Is 0.140 M at 150 °C.The rate of reaction is ________ M .

________ are used in automotive catalytic converters.

The instantaneous rate of a reaction can be read directly from the graph of molarity versus time at any point on the graph.

The combustion of ethylene proceeds by the reaction C2H4 (g)+ 3O2 (g)→ 2CO2 (g)+ 2H2O (g) When the rate of disappearance of O2 is 0.13 M ,the rate of disappearance of C2H4 is ________

In general,as activation energy increases,reaction rate ________.

What is the magnitude of the rate constant for the reaction?

The reaction A → B is first order in [A].Consider the following data. The rate constant for this reaction is ________ .

As the temperature of a reaction is increased,the rate of the reaction increases because the ________.

The reaction 2NOBr (g)→ 2 NO (g)+ Br2 (g) Is a second-order reaction with a rate constant of 0.80 M-1s-1 at 11 °C.If the initial concentration of NOBr is 0.0440 M,the concentration of NOBr after 6.0 seconds is ________.

What is the order of the reaction with respect to OH-?

The half-life for a first order rate law depends on the starting concentration.

At elevated temperatures,methylisonitrile (CH3NC)isomerizes to acetonitrile (CH3CN): CH3NC (g)→ CH3CN (g) The reaction is first order in methylisonitrile.The attached graph shows data for the reaction obtained at 198.9 °C. What is the rate constant (s-1)for the reaction?

It was determined experimentally that the reaction rate doubled when the concentration of B was doubled in the following reaction: A + B → C The reaction is ________ order in B.

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

The overall reaction below is ________ and the elementary reaction is considered ________. AB → A + B

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At elevated temperatures,nitrogen dioxide decomposes to nitrogen oxide and oxygen: NO₂(g)→ NO (g)+ O₂(g) The reaction is second order in NO₂ with a rate constant of 0.543 M^-1s^-1at If the initial [NO₂] is it will take ________ s for the concentration to drop to

The rate of disappearance of HBr in the gas phase reaction 2HBr (g)→ H₂ (g)+ Br₂ (g) Is 0.140 M at 150 °C.The rate of reaction is ________ M .

The combustion of ethylene proceeds by the reaction C₂H₄ (g)+ 3O₂ (g)→ 2CO₂ (g)+ 2H₂O (g) When the rate of disappearance of O₂ is 0.13 M ,the rate of disappearance of C₂H₄ is ________

The reaction 2NOBr (g)→ 2 NO (g)+ Br₂ (g) Is a second-order reaction with a rate constant of 0.80 M^-1s^-1at 11 °C.If the initial concentration of NOBr is 0.0440 M,the concentration of NOBr after 6.0 seconds is ________.

What is the order of the reaction with respect to OH^-?

At elevated temperatures,methylisonitrile (CH₃NC)isomerizes to acetonitrile (CH₃CN): CH₃NC (g)→ CH₃CN (g) The reaction is first order in methylisonitrile.The attached graph shows data for the reaction obtained at 198.9 °C. What is the rate constant (s^-1)for the reaction?

The overall reaction below is and the elementary reaction is considered . AB → A + B