Summary of Mole Formulae | Worked Example

3.3 The mole and the Avogadro constant 1. State that the mole, mol, is the unit of amount of substance and that one mole contains 6.02 × 10^23 particles, e.g. atoms, ions, molecules; this number is the Avogadro constant 2. Use the relationship amount of substance (mol) = mass (g) / molar mass (g/mol) to calculate amount of substance, mass, molar mass, relative atomic / molecular / formula mass, and number of particles using the Avogadro constant 3. Use the molar gas volume, taken as 24 dm3 at room temperature and pressure, r.t.p., in calculations involving gases