Consider the reaction 2NH3(g) → N2(g) + 3H2(g) If the rate Δ[H2]/Δt is 0.030 mol L-1 • s-1, what is Δ[NH3]/Δt?

A) -0.045 mol L-1• s-1 B) -0.030 mol L-1• s-1 C) -0.020 mol L-1• s-1 D) -0.010 mol L-1• s-1 E) None of these choices is correct. A) -0.045 mol L-1• s-1 B) -0.030 mol L-1• s-1 C) -0.020 mol L-1• s-1 D) -0.010 mol L-1• s-1 E) None of these choices is correct.

Exam 14: Chemical Kinetics

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At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min^-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

(Multiple Choice)

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Question 81

Is a bimolecular reaction necessarily second-order? Is a second order reaction necessarily bimolecular? Answer, with explanations and clarifications.

(Essay)

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Question 82

What is the name given for the study of how fast reactions take place?

(Multiple Choice)

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Question 83

The compound RX₃ decomposes according to the equation 3RX₃ → R + R₂X₃ + 3X₂ In an experiment the following data were collected for the decomposition at 100°C. What is the average rate of change of RX₃ over the entire experiment?

(Multiple Choice)

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Question 84

The rate of a - is a constant that is independent of reactant concentration.

(Short Answer)

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Question 85

A transition state is a species (or state) corresponding to an energy maximum on a reaction energy diagram.

(True/False)

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Question 86

A - is a reaction whose rate depends on the concentration of one of the reactants raised to the first power.

(Short Answer)

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Question 87

What is the half-life for a zeroth-order reaction?

(Multiple Choice)

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Question 88

A(n) ________ increases the reaction rate without being consumed.

(Short Answer)

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Question 89

Consider the reaction 2NH₃(g) → N₂(g) + 3H₂(g) If the rate Δ[H₂]/Δt is 0.030 mol L^-1 • s^-1, what is Δ[NH₃]/Δt?

(Multiple Choice)

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Question 90

For a zeroth-order reaction, if the concentration of reactant A is plotted vs. time, which corresponds to the slope of this plot?

(Multiple Choice)

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Question 91

A reaction has the following rate law: rate = k[A][B]² In experiment 1, the concentrations of A and B are both 0.10 mol • L^-1; in experiment 2, the concentrations are both 0.30 mol • L^-1. If the temperature stays constant, what is the value of the ratio, rate(2)/rate(1)?

(Multiple Choice)

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Question 92

(Multiple Choice)

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Question 93

The following diagram represents the first-order decomposition of A to form X according to the following balanced chemical equation: A → X. Each sphere represents 1.0 mmol of atoms, and the volume of the box is 1.0 L. What is the half-life of the reaction?

(Multiple Choice)

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Question 94

The rate of a reaction is determined by the rate of the fastest step in the mechanism.

(True/False)

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Question 95

What rate constant can be determined from only the half-life of a reaction?

(Multiple Choice)

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Question 96

What is the integrated rate law for a first-order reaction?

(Multiple Choice)

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Question 97

Consider the following potential energy profile for the A → B reaction. The overall reaction is ________.

(Multiple Choice)

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Question 98

What is the molecularity of the following elementary reaction? NHCl₂(aq) + OH^-(aq) → NCl₂^-(aq) +H₂O(l)

(Multiple Choice)

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Question 99

Which is true concerning the following potential energy diagram?

(Multiple Choice)

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Question 100

Showing 81 - 100 of 132

Exam 14: Chemical Kinetics

At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10-3 min-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

Is a bimolecular reaction necessarily second-order? Is a second order reaction necessarily bimolecular? Answer, with explanations and clarifications.

What is the name given for the study of how fast reactions take place?

The compound RX3 decomposes according to the equation 3RX3 → R + R2X3 + 3X2 In an experiment the following data were collected for the decomposition at 100°C. What is the average rate of change of RX3 over the entire experiment?

The rate of a ________-________ is a constant that is independent of reactant concentration.

A transition state is a species (or state) corresponding to an energy maximum on a reaction energy diagram.

A ________-________ is a reaction whose rate depends on the concentration of one of the reactants raised to the first power.

What is the half-life for a zeroth-order reaction?

A(n) ________ increases the reaction rate without being consumed.

Consider the reaction 2NH3(g) → N2(g) + 3H2(g) If the rate Δ[H2]/Δt is 0.030 mol L-1 • s-1, what is Δ[NH3]/Δt?

For a zeroth-order reaction, if the concentration of reactant A is plotted vs. time, which corresponds to the slope of this plot?

A reaction has the following rate law: rate = k[A][B]2 In experiment 1, the concentrations of A and B are both 0.10 mol • L-1; in experiment 2, the concentrations are both 0.30 mol • L-1. If the temperature stays constant, what is the value of the ratio, rate(2)/rate(1)?

The following diagram represents the first-order decomposition of A to form X according to the following balanced chemical equation: A → X. Each sphere represents 1.0 mmol of atoms, and the volume of the box is 1.0 L. What is the half-life of the reaction?

The rate of a reaction is determined by the rate of the fastest step in the mechanism.

What rate constant can be determined from only the half-life of a reaction?

What is the integrated rate law for a first-order reaction?

Consider the following potential energy profile for the A → B reaction. The overall reaction is ________.

What is the molecularity of the following elementary reaction? NHCl2(aq) + OH-(aq) → NCl2-(aq) +H2O(l)

Which is true concerning the following potential energy diagram?

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At 25°C the rate constant for the first-order decomposition of a pesticide solution is 6.40 × 10^-3 min^-1. If the starting concentration of pesticide is 0.0314 M, what concentration will remain after 62.0 min at 25°C?

The compound RX₃ decomposes according to the equation 3RX₃ → R + R₂X₃ + 3X₂ In an experiment the following data were collected for the decomposition at 100°C. What is the average rate of change of RX₃ over the entire experiment?

The rate of a - is a constant that is independent of reactant concentration.

A - is a reaction whose rate depends on the concentration of one of the reactants raised to the first power.

Consider the reaction 2NH₃(g) → N₂(g) + 3H₂(g) If the rate Δ[H₂]/Δt is 0.030 mol L^-1 • s^-1, what is Δ[NH₃]/Δt?

A reaction has the following rate law: rate = k[A][B]² In experiment 1, the concentrations of A and B are both 0.10 mol • L^-1; in experiment 2, the concentrations are both 0.30 mol • L^-1. If the temperature stays constant, what is the value of the ratio, rate(2)/rate(1)?

What is the molecularity of the following elementary reaction? NHCl₂(aq) + OH^-(aq) → NCl₂^-(aq) +H₂O(l)