Chemistry 0620 · 3 Stoichiometry
3.1 Formulae
State and deduce chemical, molecular, and empirical formulae, and construct balanced word, symbol, and ionic equations with state symbols.
- Questions
- 291
- Years
- 2010–2026
- Multiple choice
- 190
- Written answer
- 101
- Average marks
- 4.3
Where this subtopic appears
- Paper 2variants 21, 22, 23123
- Paper 1variants 11, 12, 1376
- Paper 3variants 31, 32, 3347
- Paper 4variants 41, 42, 4342
- Paper 6variants 61, 623
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 6 | 19 | – | 25 |
| 2024 | – | 2 | – | 2 |
| 2023 | 4 | 13 | 18 | 35 |
| 2022 | 6 | 13 | 10 | 29 |
| 2021 | 6 | 9 | 11 | 26 |
| 2020 | – | 13 | 12 | 25 |
| 2019 | 6 | 6 | 11 | 23 |
| 2018 | 3 | 11 | 16 | 30 |
| 2017 | 5 | 12 | 15 | 32 |
| 2016 | 6 | 14 | 9 | 29 |
| 2015 | 1 | 3 | 8 | 12 |
| 2014 | – | 2 | 3 | 5 |
| 2013 | – | 2 | 3 | 5 |
| 2012 | – | 1 | 2 | 3 |
| 2011 | – | 1 | 1 | 2 |
| 2010 | – | 5 | 3 | 8 |
