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

Atoms, molecules and stoichiometry — practice question

The Data Booklet is needed for this question. $1.00\,\text{g}$ of carbon is burned in a restricted supply of pure oxygen. $0.50\,\text{g}$ of the carbon burns to make $\text{CO}_2$ and $0.50\,\text{g}$ of the carbon burns to make $\text{CO}$. This mixture of $\text{CO}_2$ and $\text{CO}$ is then passed through excess $\text{NaOH(aq)}$, after which the gas that remains is dried and collected. Calculate the volume of the remaining gas. (All gas volumes are measured at $25^\circ\text{C}$ and $1\,\text{atmosphere}$ pressure.)

  • A$1\,\text{dm}^3$
  • B$1.5\,\text{dm}^3$
  • C$2\,\text{dm}^3$
  • D$3\,\text{dm}^3$

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