Chemistry 5070 · O Level · Relative masses of atoms and molecules

Relative masses of atoms and molecules — practice question

Iron may be obtained from the ore haematite, $\text{Fe}_2\text{O}_3$. What is the greatest mass of iron that could be formed from $500\,\text{kg}$ of haematite? $[\text{Ar}:\ \text{O}=16,\ \text{Fe}=56]$

  • A$160\,\text{kg}$
  • B$240\,\text{kg}$
  • C$350\,\text{kg}$
  • D$420\,\text{kg}$

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