Calculations involving gas volumes
2 marks · EasyCalculate the volume, in dm³, of 0.75 moles of carbon dioxide gas at room temperature and pressure (rtp).
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18 dm³ (±0.2)
Common mistakes: Multiplying by 22.4 instead of 24
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Marking points
M1 · 1 mark · Uses correct formula: volume = moles × 24 dm³.
A1 · 1 mark · Correct answer: 18 dm³. (follow-through)
Worked solution