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2.6.1 Relative formula mass and percentage composition
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Relative formula mass

Relative formula mass

Relative formula mass, MrM_rMr​, is the sum of the relative atomic masses, ArA_rAr​, of all the atoms shown in a chemical formula. Relative atomic mass is a weighted mean that accounts for the natural abundances of an element's isotopes.

2.6.1 Relative formula mass and percentage composition Lesson

  1. GCSE
  2. /Chemistry
  3. /2.6.1 Relative formula mass and percentage composition

Step-by-step lessons on Edexcel GCSE Chemistry 2.6.1 Relative formula mass and percentage composition. 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.

Lessons