Chemistry Practice Quiz
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Questions and Answers

What is the coordination number of the transition metal in [Co(en)2(NH3)2]Cl2?

  • 4
  • 5
  • 3
  • 6 (correct)
  • What is the vapor pressure of a solution prepared by dissolving 10.0 mmol naphthalene in 90.0 mmol ethanol at 60°C?

  • 0.498 atm
  • 0.413 atm (correct)
  • 0.367 atm
  • 0.0918 atm
  • What is the rate law for the reaction A+B→P based on the data in the table?

  • k[A]2[B]2
  • k[A] [B]2
  • k[A]2
  • k[A] [B] (correct)
  • Which of the following mechanisms is consistent with the observed rate law for the reaction of bromine with ethylene?

    <p>Br2 → 2Br slow Br + C2H4 → C2H4Br C2H4Br + Br → C2H4Br2</p> Signup and view all the answers

    If the system is at equilibrium, which of the following changes will result in a shift to the products for the reaction 2 H2O(l) → 2 H2(g) + O2(g)?

    <p>i&amp;iv</p> Signup and view all the answers

    What is the initial concentration of C in the mixture?

    <p>0.500M</p> Signup and view all the answers

    What is the value of the equilibrium constant, Kc, for the reaction A + 2B ⇌ C, given the concentration of A at equilibrium is 0.540M?

    <p>2.26</p> Signup and view all the answers

    What is the correct definition of an acid in the Lewis acid-base model?

    <p>an electron pair acceptor</p> Signup and view all the answers

    What is the oxidation number of chlorine in Al(ClO2)3?

    <p>+7</p> Signup and view all the answers

    What is the correct equilibrium-constant expression for the reaction CO2(s) + H2O(l) → H+(aq) + HCO3-(aq)?

    <p>[H+][HCO3-] / [CO2]</p> Signup and view all the answers

    What is the pH of a 0.60 M aqueous solution of formic acid, HCHO2, at 25.0°C, given the Ka value is 1.8 × 10-4?

    <p>1.98</p> Signup and view all the answers

    What is true about Gibbs free energy, ΔG?

    <p>Gibbs free energy is used to determine whether a reaction is spontaneous or not.</p> Signup and view all the answers

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