A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Feb/Mar 2022 · Q31 Mark

Compound X contains the elements C, H and O only. 2.00 g of X produces 4.00 g of carbon dioxide and 1.63 g of water when completely combusted. What is the empirical formula of X?

ACHO₂

BC₂H₂O

CC₂H₄O

DCH₂O₂

✓ Correct answer

C: C₂H₄O

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2022 Paper 1 Variant 2, question 3.

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