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 one mole of any gas at room temperature and pressure occupies 24 dm3. 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
Misunderstanding Gas Volume
Students often confuse the volume occupied by one mole of gas at room temperature and pressure, thinking it is 22.4 dm3 instead of 24 dm3.
Remember that at room temperature and pressure, one mole of any gas occupies 24 dm3, not 22.4 dm3. Use this value in calculations involving gas volumes.
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