The reaction shown below has the rate law: Rate = k[BrO3-][Br-][H+]2. BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l) What is the overall order of reaction?

A) first B) second C) third D) fourth A) first B) second C) third D) fourth

The following set of data was obtained by the method of initial rates for the reaction: BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l). What is the rate law for the reaction?

A) Rate = k[BrO3-][Br-][H+]4 B) Rate = k[BrO3-][Br-][H+]-4 C) Rate = k[BrO3-][Br-][H+]-2 D) Rate = k[BrO3-][Br-][H+]2 A) Rate = k[BrO3-][Br-][H+]4 B) Rate = k[BrO3-][Br-][H+]-4 C) Rate = k[BrO3-][Br-][H+]-2 D) Rate = k[BrO3-][Br-][H+]2

The following set of data was obtained by the method of initial rates for the reaction: BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l). Calculate the initial rate when BrO3- is 0.30 M,Br- is 0.050 M,and H+ is 0.15 M.

A) 6)1 × 10-5 M/s B) 2)7 × 10-3 M/s C) 5)3 × 10-2 M/s D) 8)4 × 10-2 M/s A) 6)1 × 10-5 M/s B) 2)7 × 10-3 M/s C) 5)3 × 10-2 M/s D) 8)4 × 10-2 M/s

The aquation of tris(1,10-phenanthroline)iron(II)in acid solution takes place according to the equation: Fe(phen)32+ + 3 H3O+ + 3 H2O → Fe(H2O)62+ + 3 phenH+. If the activation energy,Ea,is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1,what is the rate constant at 50°C?

A) 4)4 × 10-4 min-1 B) 2)2 × 10-1 min-1 C) 4)6 × 100 min-1 D) 2)3 × 103 min-1 A) 4)4 × 10-4 min-1 B) 2)2 × 10-1 min-1 C) 4)6 × 100 min-1 D) 2)3 × 103 min-1

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N2O5(g)→ 4 NO2(g)+ O2(g) If the rate of appearance of NO2 is equal to 0.560 mol/min at a particular moment,what is the rate of appearance of O2 at that moment?

A) 0)140 mol/min B) 0)280 mol/min C) 1)12 mol/min D) 2)24 mol/min A) 0)140 mol/min B) 0)280 mol/min C) 1)12 mol/min D) 2)24 mol/min

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N2O5(g)→ 4 NO2(g)+ O2(g) If the rate of appearance of O2 is equal to 2.40 mol/min at a particular moment,what is the rate of disappearance of N2O5 at that moment?

A) 0)600 mol/min B) 1)20 mol/min C) 4)80 mol/min D) 9)60 mol/min A) 0)600 mol/min B) 1)20 mol/min C) 4)80 mol/min D) 9)60 mol/min

The following set of data was obtained by the method of initial rates for the reaction: (H3C)3CBr + OH- → (H3C)3COH + Br- What is the order of reaction with respect to ion,OH-?

A) zero B) first C) second D) none of these A) zero B) first C) second D) none of these

The following pictures represent the progress of a reaction in which two A molecules combine to give a more complex molecule AS1U1B12S1U1B0,2A → AS1U1B12S1U1B0. -What is the time required to achieve the molecular mixture in drawing (d)?

A) 4 min B) 5 min C) 7 min D) 8 min A) 4 min B) 5 min C) 7 min D) 8 min

Exam 12: Chemical Kinetics

The first-order reaction,2 N₂O(g)→ 2 N₂(g)+ O₂(g),has a rate constant equal to 0.76 s^-1 at 1000 K.How long will it take for the concentration of N₂O to decrease to 12% of its initial concentration?

(Multiple Choice)

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Question 21

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l) What is the overall order of reaction?

(Multiple Choice)

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Question 22

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). What is the rate law for the reaction?

(Multiple Choice)

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Question 23

The decomposition of hydrogen peroxide is given by the following reaction: 2 H₂O₂(aq)→ 2 H₂O(l)+ O₂(g) In the presence of KI the reaction is thought to occur by the following mechanism: Step 1: H₂O₂ + I^- → H₂O + IO^- Step 2: IO^- + H₂O₂ → H₂O + O₂ + I^- What is the role of I^- in this mechanism?

(Multiple Choice)

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Question 24

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). Calculate the initial rate when BrO₃^- is 0.30 M,Br^- is 0.050 M,and H⁺ is 0.15 M.

(Multiple Choice)

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Question 25

"Instantaneous rate" is defined as the

(Multiple Choice)

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Question 26

A reaction with an activation energy,E_a = 103 kJ/mol has a rate constant,k = 3.5 × 10^-5 s^-1 at 25°C.For this reaction the rate constant at 45°C is ________.

(Short Answer)

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Question 27

Which part of the Arrhenius equation contains a term which measures the number of molecules that have the correct orientation for reaction?

(Multiple Choice)

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Question 28

Consider a bimolecular reaction in the gas phase.Which one of the following changes in condition will not cause an increase in the rate of the reaction?

(Multiple Choice)

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Question 29

The following reaction is first order in A and first order in B: A + B → Products Rate = k[A][B] What is the initial rate of this reaction in vessel (b)relative to the initial rate of this reaction in vessel (a)? Each vessel has the same volume.Shaded spheres represent A molecules,and unshaded spheres represent B molecules present at the beginning of the reaction.

(Multiple Choice)

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Question 30

The aquation of tris(1,10-phenanthroline)iron(II)in acid solution takes place according to the equation: Fe(phen)₃²⁺ + 3 H₃O⁺ + 3 H₂O → Fe(H₂O)₆²⁺ + 3 phenH⁺. If the activation energy,E_a,is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10^-3 min^-1,what is the rate constant at 50°C?

(Multiple Choice)

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Question 31

What is the rate law for the elementary reaction shown below? 2 HI → H₂ + I₂

(Multiple Choice)

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Question 32

What percentage of a radioactive substance remains after 6.00 half-lives have elapsed?

(Multiple Choice)

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Question 33

Which general rate law below corresponds to an elementary bimolecular reaction?

(Multiple Choice)

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Question 34

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of NO₂ is equal to 0.560 mol/min at a particular moment,what is the rate of appearance of O₂at that moment?

(Multiple Choice)

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Question 35

-Which of the elementary reactions shown above has a molecularity of one?

(Multiple Choice)

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Question 36

Decays by alpha emission to give )If unshaded spheres represent Atoms and shaded spheres represent Atoms,how many half-lives have passed in the following example?

(Multiple Choice)

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Question 37

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of O₂ is equal to 2.40 mol/min at a particular moment,what is the rate of disappearance of N₂O₅ at that moment?

(Multiple Choice)

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Question 38

The following set of data was obtained by the method of initial rates for the reaction: (H₃C)₃CBr + OH^- → (H₃C)₃COH + Br^- What is the order of reaction with respect to ion,OH^-?

(Multiple Choice)

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Question 39

The following pictures represent the progress of a reaction in which two A molecules combine to give a more complex molecule A₂,2A → A₂. -What is the time required to achieve the molecular mixture in drawing (d)?

(Multiple Choice)

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Question 40

Showing 21 - 40 of 206

The first-order reaction,2 N₂O(g)→ 2 N₂(g)+ O₂(g),has a rate constant equal to 0.76 s^-1 at 1000 K.How long will it take for the concentration of N₂O to decrease to 12% of its initial concentration?

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l) What is the overall order of reaction?

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). What is the rate law for the reaction?

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). Calculate the initial rate when BrO₃^- is 0.30 M,Br^- is 0.050 M,and H⁺ is 0.15 M.

"Instantaneous rate" is defined as the

A reaction with an activation energy,E_a = 103 kJ/mol has a rate constant,k = 3.5 × 10^-5 s^-1 at 25°C.For this reaction the rate constant at 45°C is ________.

Which part of the Arrhenius equation contains a term which measures the number of molecules that have the correct orientation for reaction?

Consider a bimolecular reaction in the gas phase.Which one of the following changes in condition will not cause an increase in the rate of the reaction?

What is the rate law for the elementary reaction shown below? 2 HI → H₂ + I₂

What percentage of a radioactive substance remains after 6.00 half-lives have elapsed?

Which general rate law below corresponds to an elementary bimolecular reaction?

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of NO₂ is equal to 0.560 mol/min at a particular moment,what is the rate of appearance of O₂at that moment?

-Which of the elementary reactions shown above has a molecularity of one?

Decays by alpha emission to give )If unshaded spheres represent Atoms and shaded spheres represent Atoms,how many half-lives have passed in the following example?

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of O₂ is equal to 2.40 mol/min at a particular moment,what is the rate of disappearance of N₂O₅ at that moment?

The following set of data was obtained by the method of initial rates for the reaction: (H₃C)₃CBr + OH^- → (H₃C)₃COH + Br^- What is the order of reaction with respect to ion,OH^-?

The following pictures represent the progress of a reaction in which two A molecules combine to give a more complex molecule A₂,2A → A₂. -What is the time required to achieve the molecular mixture in drawing (d)?

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Exam 12: Chemical Kinetics

The first-order reaction,2 N2O(g)→ 2 N2(g)+ O2(g),has a rate constant equal to 0.76 s-1 at 1000 K.How long will it take for the concentration of N2O to decrease to 12% of its initial concentration?

The reaction shown below has the rate law: Rate = k[BrO3-][Br-][H+]2. BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l) What is the overall order of reaction?

The following set of data was obtained by the method of initial rates for the reaction: BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l). What is the rate law for the reaction?

The decomposition of hydrogen peroxide is given by the following reaction: 2 H2O2(aq)→ 2 H2O(l)+ O2(g) In the presence of KI the reaction is thought to occur by the following mechanism: Step 1: H2O2 + I- → H2O + IO- Step 2: IO- + H2O2 → H2O + O2 + I- What is the role of I- in this mechanism?

The following set of data was obtained by the method of initial rates for the reaction: BrO3-(aq)+ 5 Br-(aq)+ 6 H+(aq)→ 3 Br2(aq)+ 3 H2O(l). Calculate the initial rate when BrO3- is 0.30 M,Br- is 0.050 M,and H+ is 0.15 M.

"Instantaneous rate" is defined as the

A reaction with an activation energy,Ea = 103 kJ/mol has a rate constant,k = 3.5 × 10-5 s-1 at 25°C.For this reaction the rate constant at 45°C is ________.

Which part of the Arrhenius equation contains a term which measures the number of molecules that have the correct orientation for reaction?

Consider a bimolecular reaction in the gas phase.Which one of the following changes in condition will not cause an increase in the rate of the reaction?

The aquation of tris(1,10-phenanthroline)iron(II)in acid solution takes place according to the equation: Fe(phen)32+ + 3 H3O+ + 3 H2O → Fe(H2O)62+ + 3 phenH+. If the activation energy,Ea,is 126 kJ/mol and the rate constant at 30°C is 9.8 × 10-3 min-1,what is the rate constant at 50°C?

What is the rate law for the elementary reaction shown below? 2 HI → H2 + I2

What percentage of a radioactive substance remains after 6.00 half-lives have elapsed?

Which general rate law below corresponds to an elementary bimolecular reaction?

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N2O5(g)→ 4 NO2(g)+ O2(g) If the rate of appearance of NO2 is equal to 0.560 mol/min at a particular moment,what is the rate of appearance of O2 at that moment?

-Which of the elementary reactions shown above has a molecularity of one?

Decays by alpha emission to give )If unshaded spheres represent Atoms and shaded spheres represent Atoms,how many half-lives have passed in the following example?

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N2O5(g)→ 4 NO2(g)+ O2(g) If the rate of appearance of O2 is equal to 2.40 mol/min at a particular moment,what is the rate of disappearance of N2O5 at that moment?

The following set of data was obtained by the method of initial rates for the reaction: (H3C)3CBr + OH- → (H3C)3COH + Br- What is the order of reaction with respect to ion,OH-?

The following pictures represent the progress of a reaction in which two A molecules combine to give a more complex molecule A2,2A → A2. -What is the time required to achieve the molecular mixture in drawing (d)?

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

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The first-order reaction,2 N₂O(g)→ 2 N₂(g)+ O₂(g),has a rate constant equal to 0.76 s^-1 at 1000 K.How long will it take for the concentration of N₂O to decrease to 12% of its initial concentration?

The reaction shown below has the rate law: Rate = k[BrO₃^-][Br^-][H⁺]². BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l) What is the overall order of reaction?

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). What is the rate law for the reaction?

The following set of data was obtained by the method of initial rates for the reaction: BrO₃^-(aq)+ 5 Br^-(aq)+ 6 H⁺(aq)→ 3 Br₂(aq)+ 3 H₂O(l). Calculate the initial rate when BrO₃^- is 0.30 M,Br^- is 0.050 M,and H⁺ is 0.15 M.

A reaction with an activation energy,E_a = 103 kJ/mol has a rate constant,k = 3.5 × 10^-5 s^-1 at 25°C.For this reaction the rate constant at 45°C is ________.

What is the rate law for the elementary reaction shown below? 2 HI → H₂ + I₂

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of NO₂ is equal to 0.560 mol/min at a particular moment,what is the rate of appearance of O₂at that moment?

The decomposition of dinitrogen pentoxide is described by the chemical equation 2 N₂O₅(g)→ 4 NO₂(g)+ O₂(g) If the rate of appearance of O₂ is equal to 2.40 mol/min at a particular moment,what is the rate of disappearance of N₂O₅ at that moment?

The following set of data was obtained by the method of initial rates for the reaction: (H₃C)₃CBr + OH^- → (H₃C)₃COH + Br^- What is the order of reaction with respect to ion,OH^-?

The following pictures represent the progress of a reaction in which two A molecules combine to give a more complex molecule A₂,2A → A₂. -What is the time required to achieve the molecular mixture in drawing (d)?