Chemistry 9701 · 2 Atoms, molecules and stoichiometry
2.4 Reacting masses and volumes (of solutions and gases)
Perform calculations involving reacting masses, gas volumes, solution concentrations, percentage yields, and limiting reagents.
- Questions
- 453
- Years
- 2015–2026
- Multiple choice
- 157
- Written answer
- 296
- Average marks
- 9.3
Practise atoms, molecules and stoichiometry questions with instant markingTeachers: build a worksheet from past papers
Where this subtopic appears
- Paper 3variants 31, 32, 33, 34, 35, 36, 37, 38163
- Paper 1variants 11, 12, 13, 14157
- Paper 5variants 51, 52, 5389
- Paper 2variants 21, 22, 2324
- Paper 4variants 41, 42, 4320
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 30 | – | 30 |
| 2025 | – | 2 | – | 2 |
| 2023 | 7 | 23 | 15 | 45 |
| 2022 | 7 | 24 | 22 | 53 |
| 2021 | 8 | 17 | 15 | 40 |
| 2020 | 5 | 23 | 17 | 45 |
| 2019 | 7 | 30 | 16 | 53 |
| 2018 | 5 | 22 | 17 | 44 |
| 2017 | 6 | 20 | 22 | 48 |
| 2016 | 6 | 23 | 27 | 56 |
| 2015 | – | 21 | 16 | 37 |
