A gas syringe contains 0.15 mol of nitrogen gas at room temperature and pressure. Its volume is 3.6 dm3. A second gas syringe contains 0.30 mol of nitrogen gas at the same temperature and pressure.
A student says that the second syringe has a volume of 3.6 dm3 because it contains the same gas.
Explain why the student is wrong.
152 exam-style questions on OCR GCSE Chemistry 5.1 Monitoring chemical reactions, covering 5.1.1 The technique of titration, 5.1.2 Theoretical mass, percentage yield and atom economy, 5.1.3 Concentration of a solution in mol/dm3, 5.1.4 Concentration calculations and titration results, 5.1.5 Molar gas volume and volumes of gases in reactions, and 5.1.6 Choosing a reaction pathway. Each one has a worked solution and a mark scheme showing where the marks go.