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

Atoms, molecules and stoichiometry — practice question

A sample of $4.70\text{ g}$ of an ammonium salt is warmed with excess aqueous sodium hydroxide. At room temperature and pressure, $1.41\text{ dm}^3$ of ammonia gas is produced. Which ammonium salt is this?

  • Aammonium bromide $(M_r = 97.9)$
  • Bammonium carbonate $(M_r = 96)$
  • Cammonium nitrate $(M_r = 80)$
  • Dammonium sulfate $(M_r = 132.1)$

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