Question detail
Calculate the volume of 5 moles of a gas at room temperature and pressure.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Use of amount of substance in relation to volumes of gases (chemistry only) (HT only)
Question
- A. 120 dm3
- B. 96 dm3
- C. 108 dm3
- D. 84 dm3
Answer
120 dm3
Explanation
At room temperature and pressure, one mole of gas occupies 24 dm3. Therefore, 5 moles occupy 5 x 24 dm3 = 120 dm3.
Common mistake
Confusing Moles with Volume
Students often think that the volume of a gas is the same as the amount in moles without considering the conditions of temperature and pressure.
Remember that equal amounts in moles of gases occupy the same volume only under the same temperature and pressure conditions. Always check these conditions when making calculations. Keep the correction anchored to Gas volumes and amount of substance; check formula, substitution, calculation, final answer, and unit where relevant.
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