Ratios and actual atom counts
Ratios and actual atom counts
An empirical formula shows the simplest whole-number ratio of atoms in a compound. A molecular formula shows the actual number of atoms in one molecule.
Step-by-step lessons on Edexcel GCSE Chemistry 2.6.2 Empirical and molecular formulae. 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.