Stoichiometry and the Mole: Practice

The mole lets chemists count particles by weighing, and reacting quantities follow from the ratio in a balanced equation, with one mole of any gas taking up 24 dm³ at room temperature and pressure. Balancing equations and Mr values (including CuSO₄·5H₂O) lead on to converting masses, gas volumes and concentrations into moles and working out reacting masses line by line.