Aluminium powder burns in oxygen to form aluminium oxide, Al₂O₃. The reactants are present in exactly the amounts needed, and all the aluminium oxide is collected.
| Substance | Mass (g) |
|---|---|
| Aluminium, Al | 5.40 |
| Oxygen, O₂ | 4.80 |
| Aluminium oxide, Al₂O₃ | 10.20 |
| Element | Relative atomic mass (Aᵣ) |
|---|---|
| Al | 27.0 |
| O | 16.0 |
Work out the balanced symbol equation for this reaction from the results, using amounts in moles.
Show your working.
134 exam-style questions on OCR GCSE Chemistry 3.1 Introducing chemical reactions, covering 3.1.1 Writing formulae and balanced chemical equations, 3.1.2 Formulae of compounds from ions, and state symbols, 3.1.3 Conservation of mass and observed changes in mass, 3.1.4 Half equations and balanced ionic equations, 3.1.5 The mole and the Avogadro constant, and 3.1.6 Stoichiometry, limiting reactants and reacting masses. Each one has a worked solution and a mark scheme showing where the marks go.