CH-849
Percentage yield and purity
Chemistry · Secondary 3 · Medium · Percentage yield and purity
A 0.500 g sample of an oxide of magnesium is reduced to magnesium metal. The mass of magnesium obtained is 0.300 g. What is the percentage by mass of oxygen in the oxide?
- 30%
- 37.5%
- 40%
- 60%
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