Brainlag PlusEvery GCSE Chemistry equation in one place, rearranging them, and choosing the right one.
All of them, with units
GCSE Chemistry papers give a periodic table but no equation sheet, so these are learnt.
| Quantity | Equation | Units |
|---|---|---|
| moles | n = mass ÷ Mr | mol, g |
| concentration | mass ÷ volume, or moles ÷ volume | g/dm³, mol/dm³ |
| gas volume at RTP (Higher, Chemistry only) | volume = moles × 24 | dm³ |
| percentage yield (Chemistry only) | actual ÷ theoretical × 100 | % |
| atom economy (Chemistry only) | Mr of useful product ÷ total Mr of reactants × 100 | % |
| mean rate | quantity ÷ time | g/s, cm³/s, mol/s |
| Rf | distance moved by substance ÷ distance moved by solvent | none |
The rest of this lesson and its 11 practice questions are in Plus.
Screen 1 of 2, free to read.
- 11 exam-style questions, marked as you go, each with a worked solution
- The Molar Mass Calculator beside every question
- Anything you get wrong is saved to your flashcards