Question detail
Calculate the volume of 3 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
Question
Type
exam_style
Style
Topic
Use of amount of substance in relation to volumes of gases (chemistry only) (HT only)
Question
Calculate the volume of 3 moles of a gas at room temperature and pressure.
Answer
The calculated answer is 72 dm3.
Explanation
This uses Gas Volume at Room Temperature and Pressure because the objective is about (chemistry only) (HT only) State that equal amounts in moles of gases occupy the same volume under the same temperature and pressure conditions. This exam wording variant asks students to separate chemistry only from similar Unit 4.3 calculation steps. The reasoning belongs to Gas volumes and amount of substance within Use of amount of substance in relation to volumes of gases (chemistry only) (HT only), so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3.
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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