Chemistry The Mole Question?
2017-04-25 6:09 pm
0.4764g of an oxide of iron was reduced by a stream of carbon dioxide. The mass of iron remained was 0.345g. Find the empirical formula of the oxide. [Fe=56]
回答 (1)
2017-04-25 6:54 pm
✔ 最佳答案
In 0.4764 g of the sample of the oxide of iron :Mass of Fe = 0.345 g
Mass of O = (0.4764 - 0.345) g = 0.1314 g
Mole ratio Fe : O
= (0.345/56) : (0.1314/16)
= 0.00616 : 0.00821
≈ 3 : 4
Empirical formula = Fe3O4
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