What is a mole?
What is a mole?
A mole is an amount of substance containing 6.02×10236.02 \times 10^{23}6.02×1023 particles. This number is the Avogadro constant, NAN_{\text{A}}NA, and it is the same for every substance.
Step-by-step lessons on Edexcel GCSE Chemistry 2.6.5 The mole and the Avogadro constant. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.