Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

A surplus of zinc is placed into $100\,\text{cm}^3$ of $1.0\,\text{mol dm}^{-3}$ hydrochloric acid. The reaction equation is given as: $\text{Zn} + \text{2HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2$. Determine the greatest volume of hydrogen gas released at room temperature and pressure.

  • A$1.2\,\text{dm}^3$
  • B$2.0\,\text{dm}^3$
  • C$2.4\,\text{dm}^3$
  • D$24\,\text{dm}^3$

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