A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2016 · Q71 Mark
0.10 g of the volatile liquid X formed 0.025 dm³ of vapour at 100 °C and atmospheric pressure. 1 mol of vapour occupies 22.4 dm³ at 0 °C and atmospheric pressure. What is the relative molecular mass of X?
A0.025 × 273 × 22.4 / 0.10 × 373
B0.025 × 373 × 22.4 / 0.10 × 273
C0.10 × 273 × 22.4 / 0.025 × 373
D0.10 × 373 × 22.4 / 0.025 × 273
✓ Correct answer
D: 0.10 × 373 × 22.4 / 0.025 × 273
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