Chemistry · Structure 1: Models of the particulate nature of matter

S1.4 — Counting particles by mass: The mole

Chemistry · SL / HL · syllabus-mapped notes

1. The mole and molar mass

   The mole and the Avogadro constant, relative atomic and formula mass, and mass–mole–particle calculations.

2. Formulae and composition

   Empirical vs molecular formula, and determining them from percentage composition and molar mass.

3. Concentration and gas volumes

   Molar concentration, and using Avogadro’s law and mole ratios with gas volumes.