Molar volume of gases
Molar volume of gases
The amount of substance tells us how many particles are present and is measured in moles, mol\text{mol}mol. At the same temperature and pressure, equal numbers of moles of any gases occupy equal volumes.
Step-by-step lessons 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 builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.