Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Water hydrolyses the compound $\text{S}_2\text{O}_7$ to form sulfuric acid and oxygen only. What volume of oxygen, at room temperature and pressure, is given off when $0.352\,\text{g}$ of $\text{S}_2\text{O}_7$ is hydrolysed?

  • A$12\,\text{cm}^3$
  • B$24\,\text{cm}^3$
  • C$48\,\text{cm}^3$
  • D$96\,\text{cm}^3$

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