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

Atoms, molecules and stoichiometry — practice question

Sodium azide, $\text{NaN}_3$, breaks down as shown. $2\text{NaN}_3 \rightarrow 2\text{Na} + 3\text{N}_2$ What volume of nitrogen, measured at room temperature and pressure, is formed when $150\ \text{g}$ of sodium azide decomposes?

  • A$166\ \text{dm}^3$
  • B$83\ \text{dm}^3$
  • C$55\ \text{dm}^3$
  • D$37\ \text{dm}^3$

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