Chemistry 5070 · O Level · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

A $250\,\text{cm}^3$ sample of $1.0\,\text{mol dm}^{-3}$ hydrochloric acid reacts with an excess of solid sodium carbonate. The equation is given below. $\text{2HCl(aq)} + \text{Na}_2\text{CO}_3\text{(s)} \rightarrow \text{2NaCl(aq)} + \text{CO}_2\text{(g)} + \text{H}_2\text{O(l)}$ What volume of carbon dioxide is formed when it is measured at room temperature and pressure?

  • A$3.0\,\text{dm}^3$
  • B$6.0\,\text{dm}^3$
  • C$12\,\text{dm}^3$
  • D$24\,\text{dm}^3$

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