Question detail

In Gas volumes and amount of substance, which option best answers variant 5 of this quantitative chemistry 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.

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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. formula and unit: (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3
B. wrong formula: uses a different Unit 4.3 relationship from Gas volumes and amount of substance
C. wrong unit: gives a value without checking the required unit
D. wrong reasoning: confuses coefficients, subscripts, mass, moles, or concentration

Answer

The correct option is formula and unit: (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3.

Explanation

The correct option is formula and unit: (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3. It is correct because it directly supports the approved learning objective to (chemistry only) (HT only) State that one mole of any gas at room temperature and pressure occupies 24 dm3. This 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 the answer must use the named Unit 4.3 relationship and avoid mixing it with nearby ideas such as mass, moles, concentration, yield, atom economy, gas volume, coefficients, or subscripts.

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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