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

Atoms, molecules and stoichiometry — practice question

The Data Booklet may be needed for this question. A mixture of aluminium powder and anhydrous barium nitrate is used as the propellant in certain fireworks. Only metal oxides and nitrogen are formed. What volume of nitrogen, measured under room conditions, is formed when $0.783\,\text{g}$ of anhydrous barium nitrate reacts with excess aluminium?

  • A$46.8\,\text{cm}^3$
  • B$72.0\,\text{cm}^3$
  • C$93.6\,\text{cm}^3$
  • D$144\,\text{cm}^3$

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