Chemical Combination

Contents & notes: what this topic covers

Under Chemical Combination, the JAMB Chemistry syllabus expects you to study:

• 2. Chemical Combination Laws of definite, multiple and reciprocal ( proportions, law of conservation of matter, chemical symbols, formulae, equations (ii) and their uses, relative atomic mass based on C=12, the mole concept and stoichiometry of reactions
• (iii)

Study notes & guidance

Study Chemical Combination using a recommended Chemistry textbook that follows the JAMB syllabus. Work through the contents listed above one by one, make brief notes in your own words, and then practise as many questions on this topic as you can — in Chemistry, understanding and steady practice matter far more than memorising. Use the objectives below as a checklist: if you can do each one confidently, you have mastered this topic.

Objectives — candidates should be able to

After studying Chemical Combination, you should be able to:

1. Deduce the chemical laws from given expressions/statements/data; perform simple calculations involving formulae, equations/chemical composition and the mole concept; and deduce the stoichiometry of chemical reactions.

These objectives are from the official JAMB syllabus. Use them as a checklist — if you can do each one confidently, you have mastered this topic.

Source: official JAMB UTME Chemistry syllabus (IBASS, jamb.gov.ng). Reproduced for study use. Last checked: 17 Sept 2026. Always confirm the current syllabus on the official portal.