Chemistry 0620 · 3 Stoichiometry
3.3 The mole and the Avogadro constant
Use the mole, Avogadro constant, molar gas volume, and stoichiometry to calculate masses, concentrations, gas volumes, empirical/molecular formulae, yields, and purity.
- Questions
- 196
- Years
- 2011–2026
- Multiple choice
- 99
- Written answer
- 97
- Average marks
- 7.2
Where this subtopic appears
- Paper 2variants 21, 22, 2381
- Paper 4variants 41, 42, 4364
- Paper 3variants 31, 32, 3326
- Paper 1variants 11, 12, 1318
- Paper 6variants 61, 62, 634
- Paper 5variants 51, 523
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 4 | 11 | – | 15 |
| 2023 | 4 | 5 | 9 | 18 |
| 2022 | 4 | 10 | 11 | 25 |
| 2021 | 1 | 10 | 8 | 19 |
| 2020 | – | 6 | 5 | 11 |
| 2019 | 4 | 6 | 11 | 21 |
| 2018 | 4 | 13 | 11 | 28 |
| 2017 | 5 | 10 | 7 | 22 |
| 2016 | 3 | 9 | 9 | 21 |
| 2015 | 2 | 4 | 1 | 7 |
| 2014 | – | 2 | 1 | 3 |
| 2013 | – | 1 | 2 | 3 |
| 2012 | – | 1 | 1 | 2 |
| 2011 | – | – | 1 | 1 |
