# 8.E: Homework Chapter 8 Answer Key

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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

8.E: Homework Chapter 8 Answer Key is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.