Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

The equation for the reaction between iron(III) oxide and carbon monoxide is given below. $\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2$. If $16.8\,\text{g}$ of carbon monoxide reacts completely with iron(III) oxide and $8.96\,\text{g}$ of iron is formed, what is the percentage yield of iron?

  • A26.7\%
  • B40.0\%
  • C53.3\%
  • D80.0\%

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