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CAIE IGCSE Chemistry 3.1.5 Empirical formula of a compound as the

CAIE IGCSE Chemistry 3.1.5 Empirical formula of a compound as the
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise reducing molecular formulae to empirical formulae for acids, esters, polymers and hydrocarbons using atom ratios.

How this is tested

  • select the compound or polymer repeat unit that matches a given empirical formula

Question 11

[Maximum number: 1]

What is the empirical formula of ethanoic acid?

A

CHO

B

CH2O\mathrm{CH}_{2} \mathrm{O}

C

C2H2O\mathrm{C}_{2} \mathrm{H}_{2} \mathrm{O}

D

C2H4O2\mathrm{C}_{2} \mathrm{H}_{4} \mathrm{O}_{2}