Chemistry 5070 · O Level · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

The equation represents how iron is obtained when iron(III) oxide is reduced. $\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2$ 80 tonnes of iron(III) oxide gives 50 tonnes of iron. Calculate the percentage yield?

  • A45%
  • B63%
  • C68%
  • D89%

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