Chemical Reaction Rates and Rate Expressions Quiz
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Questions and Answers

What is the rate expression in terms of reactants and products for the reaction: N2 (g) + O2 (g) → 2 NO (g)?

  • Rate = k[NO]
  • Rate = k[N2][O2]2
  • Rate = k[NO]2
  • Rate = k[N2][O2] (correct)

    • What is the average rate of the reaction between 10 seconds and 30 seconds?

  • 0.019 M/s
  • 0.015 M/s
  • 0.013 M/s (correct)
  • 0.022 M/s

    • What is the rate law for the reaction: A + 2 B → C?

  • Rate = k[A]4
  • Rate = k[A]4[B]
  • Rate = k[A]2[B] (correct)
  • Rate = k[A]1

    • What is the half-life for the first-order reaction: 2 H2O2 → 2 H2O + O2?

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    If the concentration of CHCl3 is increased by a factor of five while the concentration of Cl2 is kept the same, what will happen to the rate of the reaction?

    <p>increase by a factor of five</p> Signup and view all the answers

    Study Notes

    Rate Expressions

    • The rate expression for the reaction N2 (g) + O2 (g) → 2 NO (g) is in terms of reactants and products.

    Average Rate

    • The average rate of the reaction between 10 seconds and 30 seconds is calculated.

    Rate Law

    • The rate law for the reaction A + 2 B → C is a mathematical expression that describes the relationship between reactant concentrations and reaction rate.

    Half-Life

    • The half-life for the first-order reaction 2 H2O2 → 2 H2O + O2 is the time taken for the concentration of the reactant to decrease by half.

    Effect of Concentration on Rate

    • If the concentration of CHCl3 is increased by a factor of five while the concentration of Cl2 is kept the same, the rate of the reaction will increase.

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    Description

    Test your knowledge of chemical reaction rates and rate expressions in this CEM 122 Final Exam Review quiz. Practice writing rate expressions for reactions and calculating average rates using concentration-time data. Perfect for students preparing for their final exam in chemistry.

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