Before commencing this short but nonetheless vital Module H(2024), you should, at
a minimum, be able to carry out the main routines and procedures encountered in Module C(2020) Amount of substance & molar mass.  Although strongly advocated prior to tackling stoichiometry, it is not necessary to have studied Modules  E(2021) Avogadro's law & molar gas volume & F(2022) Concentration & amount of substance.