The mole and the Avogadro constant

The Avogadro constant as the number of particles in a mole.

The mole as applied to electrons, atoms, molecules, ions, formulas and equations.

The concentration of a substance in solution, measured in mol dm⁻³.

Students should be able to carry out calculations:

• using the Avogadro constant

• using mass of substance, Mᵣ, and amount in moles

• using concentration, volume and amount of substance in a solution.

Students will not be expected to recall the value of the Avogadro constant.

MS 0.1

Students carry out calculations using numbers in standard and ordinary form, eg using the Avogadro constant.

MS 0.4

Students carry out calculations using the Avogadro constant.

MS 1.1

Students report calculations to an appropriate number of significant figures, given raw data quoted to varying numbers of significant figures.

Students understand that calculated results can only be reported to the limits of the least accurate measurement.