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

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Question 8

A technician heats a sample of lithium carbonate until it decomposes completely.

$Li2CO3→Li2O+CO2\text{Li}_2\text{CO}_3 \rightarrow \text{Li}_2\text{O} + \text{CO}_2$

The relative formula mass of lithium carbonate is 74. At room temperature and pressure, one mole of any gas occupies 24 dm³.

The technician collects 4.8 dm³ of carbon dioxide at room temperature and pressure.

What mass of lithium carbonate was heated?

[1]

$g29.6\ \text{g}$

$g14.8\ \text{g}$

$g7.4\ \text{g}$

$g370\ \text{g}$

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