ZIMSEC O-Level Chemistry
Percentage composition
Percentage composition in ZIMSEC O-Level Chemistry: what the syllabus expects you to know, the learning objectives and how to practise.
Subtopic21 practice questions1 lesson
Overview
Form 4 (competency matrix 8.19.1), including empirical and molecular formulae.
Learning objectives
What the syllabus expects you to be able to do.
- 7.1.5.3Calculate the percentage composition of elements in compounds and ores, for example haematite, copper pyrites, bauxite, fertilisers and ores of the platinum-group metals.
- 7.1.5.4Calculate empirical and molecular formulae.
Lessons
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Percentage composition, empirical and molecular formulae
35 min
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Sample question
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