Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

The equation showing the reaction of magnesium with dilute sulfuric acid is given below. The $M_r$ value for $\text{MgSO}_4$ is $120$. $\text{Mg} + \text{H}_2\text{SO}_4 \rightarrow \text{MgSO}_4 + \text{H}_2$ What mass of magnesium sulfate is produced when $12\,\text{g}$ of magnesium reacts completely with dilute sulfuric acid?

  • A$5\,\text{g}$
  • B$10\,\text{g}$
  • C$60\,\text{g}$
  • D$120\,\text{g}$

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