When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 20.4 g of carbon were burned in the presence of 71.1 g of oxygen, 16.7 g of oxygen remained unreacted. What mass of carbon dioxide was produced?
Express your answer to three significant figures and include the appropriate units.
C + O2 ---> CO2
Mols of C
20.4 /12 g/mol = 1.7 mol of C
result is 1.7 mol of CO2
C = 12
O2 = 32
CO2 = 44 g/mol
1.7 mol * 44 g/mol = 74.8 grams
posted by Damon
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