4 FeS2 + 11 O2 →2 Fe2O3 + 8 SO2
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FeS2 = 120 g/mol
4 FeS2 + 11 O2 →2 Fe2O3 + 8 SO2
g FeS2 = 223 g Fe2O3 x 1 mol Fe2O3 x 4 mol FeS2 x 120 g FeS2
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159.68 gFe2O3 2 mol Fe2O3 1 mol FeS2
g FeS2 = 335.17 g