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

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Question 2

An aluminium sample is added to an excess of dilute hydrochloric acid. The reaction continues until all the aluminium has reacted.

2Al+6HCl→2AlCl3+3H22\text{Al} + 6\text{HCl} \rightarrow 2\text{AlCl}_3 + 3\text{H}_22Al+6HCl→2AlCl3​+3H2​

The hydrogen collected has a volume of 7.2 dm3 at room temperature and pressure. One mole of any gas occupies 24 dm3 at room temperature and pressure. One mole of aluminium has a mass of 27 g.

What is the mass of aluminium that reacted?

[1]
A

5.4 g5.4\ \text{g}5.4 g

B

12.2 g12.2\ \text{g}12.2 g

C

2.7 g2.7\ \text{g}2.7 g

D

8.1 g8.1\ \text{g}8.1 g

Markscheme

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

  1. GCSE
  2. /Chemistry
  3. /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.

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