Question detail

What is the volume of 20 g of nitrogen gas (N2) at room temperature and pressure? (Relative formula mass of N2 = 28 g/mol)

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

17.1 dm3

Using the formula: volume = (mass / Mr) x 24, we calculate moles = 20 g / 28 g/mol, resulting in a volume of 17.1 dm3.

Incorrect Volume Calculation

Students often forget to convert the mass of the gas into moles before calculating the volume, leading to incorrect results.

Always use the formula to convert mass to moles first, then apply the gas volume formula at room temperature and pressure.

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