3.5 Use of amount of substance in relation to volumes of gases

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Question 6

An electrolysis cell splits water into hydrogen and oxygen.

$2H2O→2H2+O22\text{H}_2\text{O} \rightarrow 2\text{H}_2 + \text{O}_2$

The cell gives off 6.0 dm³ of oxygen, measured at room temperature and pressure.

Relative formula mass ( $M_r$ ) of water = 18

At room temperature and pressure, one mole of any gas occupies 24 dm³.

What mass of water was split?

[1]

$g18.0\ \text{g}$

$g2.25\ \text{g}$

$g4.5\ \text{g}$

$g9.0\ \text{g}$

Markscheme

3.5 Use of amount of substance in relation to volumes of gases Questions

GCSE
Chemistry
3.5 Use of amount of substance in relation to volumes of gases

100 exam-style questions on AQA GCSE Chemistry 3.5 Use of amount of substance in relation to volumes of gases, covering 3.5.1 Volumes of gases. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank·3.5 Use of amount of substance in relation to volumes of gases