Answers to Stoichiometry Problems - Chemistry
Answers to Stoichiometry Problems
1. a) 0.536 mol Li x (1 mol N2/6 mol Li) x (28.0 g N2/1 mol N2) = 2.50 g N2\
b) 46.4 g Li3N x (1 mol Li3N/34.8 g Li3N) x (6 mol Li/2 mol Li3N) = 4.00 mol Li
c) 3.65 g Li x (1 mol Li/6.94 g Li) x (2 mol Li3N/6 mol Li) x (34.8 g Li3N/1 mol Li3N) = 6.10 g Li3N
d) 7.00 g N2 x (1 mol N2/28.0 g N2) x (6 mol Li/1 mol N2) = 1.50 mol Li
2. a) 0.211 moles H2 x (1 mol Sn/2 mol H2) x (118.7 g Sn/1 mol Sn) = 12.5 g Sn
b) 339 g SnO2 x (1 mol SnO2/150.7 g SnO2) x (2 mole H2O/1 mol SnO2) = 4.50 mol H2O
c) 39.4 g Sn x (1 mol Sn/118.7 g Sn) x (1 mol SnO2/1 mol Sn) x (150.7 g SnO2/1 mol SnO2) = 50.0 g SnO2
d) 3.00 g H2 x (1 mol H2/2.02 g H2) x (1 mol Sn/2 mol H2) x (6.02 x 1023 atoms/1 mol Sn)
= 4.47 x 1023 atoms
e) 1.20 x 1021 molecules H2O x (1 mol H2O/6.02 x 1023 molecules) x (1 mol SnO2/2 mol H2O) x (150.7 g SnO2/1 mol SnO2) = 0.150 g SnO2
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