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

Atoms, molecules and stoichiometry — practice question

A sample of the volatile liquid X with a mass of $0.10\,\text{g}$ produced $0.025\,\text{dm}^3$ of vapour at $100^{\circ}\text{C}$ and atmospheric pressure. At $0^{\circ}\text{C}$ and atmospheric pressure, $1$ mole of vapour has a volume of $22.4\,\text{dm}^3$. What is the relative molecular mass of X?

  • A$\dfrac{0.025 \times 273 \times 22.4}{0.10 \times 373}$
  • B$\dfrac{0.025 \times 373 \times 22.4}{0.10 \times 273}$
  • C$\dfrac{0.10 \times 273 \times 22.4}{0.025 \times 373}$
  • D$\dfrac{0.10 \times 373 \times 22.4}{0.025 \times 273}$

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