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Molecular vs. Empirical Formulae

Molecular vs. Empirical Formulae

Ball-and-stick model of butane and its empirical formula

Chemists use symbols and numbers to describe exactly what is happening in a reaction. When dealing with simple molecules, we use two different types of formula depending on the information we need.

Formulae Lesson

  1. IGCSE
  2. /Chemistry
  3. /Formulae

Step-by-step lessons covering CIE IGCSE Chemistry Formulae for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended), plus Paper 5 or Paper 6 format. Build a solid grasp of atomic structure, bonding and the mole concept early, since these underpin almost every other topic, then move on to the more calculation-heavy quantitative and organic chemistry content.

Lessons