Question detail
A gas has a mass of 32 g and a relative formula mass of 16 g/mol. Calculate the volume of this 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
A gas has a mass of 32 g and a relative formula mass of 16 g/mol. Calculate the volume of this gas at room temperature and pressure.
Answer
The answer is 48 g.
Explanation
This uses Moles From Mass because the objective is about (chemistry only) (HT only) Calculate amount in moles from gas volume at room temperature and pressure. 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 Volume and Moles
Students often confuse the volume of a gas with the amount in moles, forgetting that they need to use the relationship that 1 mole of gas occupies 24 dm3 at room temperature and pressure.
To fix this, remember to use the formula: moles = volume / 24 dm3 when calculating the amount in moles from gas volume.
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