Question detail
For Gas volumes and amount of substance, which amount relationship answer best supports this Unit 4.3 objective: (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3?
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. 96 dm3
- B. Wrong amount relationship: confuses chemistry only with a nearby Unit 4.3 idea
- C. Wrong unit check: uses the wrong unit for Gas volumes and amount of substance
- D. Wrong calculation link: does not support (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3
Answer
The correct option is 96 dm3. The calculated answer is 96 dm3.
Explanation
The correct option is 96 dm3. 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 amount relationship 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. The other options are weaker because they either use the wrong formula, the wrong unit, a vague relationship, or the wrong quantitative context.
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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