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8.E: Homework Chapter 8 Answer Key

  • Page ID
    202175
  • General Questions

    1.          3 pizzas, limited by the cheese

    Mole-to-Mole Conversions

    3.          0.28 moles Cl2(g)

    5.              ­3.0 moles NH3

    7.          2.4 moles NaCl(aq)

    9.          2NO(g) + 5H2(g) → 2NH3(g) + 2H2O(g)

                       2.18 moles NH3

    11.        2.30 moles aluminum chloride

    13.        Cu2O(s) + C(s) → 2Cu(s) + CO(g)

                       3.2 moles carbon

    Mass-to-Mass Conversions

    15.        31.3 g NaCl

    17.        25.1 g CH3OH

    19.        2Al(s) + 3Cl2(g) → 2AlCl3(s)

                  0.56 g AlCl3

    21.          2Fe(s) + 3S(l) → Fe2S3(s)

                  6.0 g Fe2S3

    23.        94.2 g NO2

    25.        6CO2(g) + 6H2O(l) → 6O2(g) + C6H12O6(aq)

                  3.8 g C6H12O6

                  4.1 g O2

     

     

    Limiting Reactant, Theoretical Yield, and Percent Yield

    27.  Limiting reactant: 1.4 mol Cl2

                  2.8 mol KCl

    29.        5.54 g H2O

                  18.0 g NaCl

                  Limiting reactant: 12.3 g NaOH

    31. Limiting reactant: 0.56 mol Al

    33. Limiting reactant: 1.4 g Mg

    35. Limiting reactant: 21.88 g Cl2

    Theoretical yield: 22.5 g HCl

    54.84%

    37.        4AB + C2 → 2(AB)2C

                  Limiting reactant: 34.5 g AB

                  39.2 g C2

                  42.9 g (AB)2C

    39. C6H12O6 + 6O2 → 6CO2 + 6H2O

    a.             Limiting reactant: 10.5 mol O2

    b.      0 Limiting reactant: 0.45 mol O2

    c. 2    Limiting reactant: 13.5 g O2

    d. 4   Limiting reactant: 45.654 g C6H12O6

    41.        SnO2 + 2H2 → Sn + 2H2O

                  Limiting reactant: 5.6 mol H2

                       3.3 x 10^2 g Sn, 11 g H2, 1.0 x 10^2 g H2O, 90. g SnO2

     

     

    Challenge Problems

    43.        6CO2 + 6H2O → C6H12O6 + 6O2

                  57.5 g C6H12O6

    45.           81% CO2

                  57%   H2O           

                  90%  NaC2H3O2

                  Limiting reactant: 0.99 g NaHCO3

                       0.52 g CO2, 0.21 g H2O, 0.97 g NaC2H3O2

    47.        Mg(OH)2(s) + 2HCl(aq) → MgCl2(aq) + 2H2O(l)

                 

                  3.6 g Mg(OH)2