O-LevelChemistryStoichiometry5070/11 · May/June 2024 · Q61 Mark

Statements about empirical and molecular formulae are given. Which statement is correct?

AThe empirical and molecular formulae of a compound are always different.

BThe empirical formulae of ethyne, C₂H₂, and of benzene, C₆H₆, are the same.

CThe molecular formula always shows the simplest whole-number ratio of the different atoms or ions in a compound.

DThe empirical formula always shows the numbers and types of different atoms in one molecule of a compound.

✓ Correct answer

B: The empirical formulae of ethyne, C₂H₂, and of benzene, C₆H₆, are the same.

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Topic: Stoichiometry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 6.

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