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CAIE IGCSE Chemistry 3.1.5 Empirical Formula of a Compound As the Questions

Calculate empirical formulae by reducing the simplest whole-number ratio of atoms in a compound.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • calculate empirical formula from a molecular formula
  • deduce empirical formula from atom ratios
  • identify empirical formulae of acids and organic compounds
  • write empirical formula for polymers and esters

CAIE IGCSE Chemistry 3.1.5 Empirical Formula of a Compound As the Questions question 1

[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}

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