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From atomic mass to formula mass

From atomic mass to formula mass

Relative atomic mass, ArA_rAr​, compares the weighted mean mass of an element's atoms with one twelfth of the mass of a carbon-12 atom. The ArA_rAr​ value is read from the periodic table and has no units because it is a ratio.

3.1.2 Relative formula mass Lesson

  1. GCSE
  2. /Chemistry
  3. /3.1.2 Relative formula mass

Step-by-step lessons covering AQA GCSE Chemistry 3.1.2 Relative formula mass for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons