0654.C3.1.02 — Define the molecular formula of a compound as the number and type of atoms in one molecule: past paper questions
Real questions on 0654.c3.1.02 — define the molecular formula of a compound as the number and type of atoms in one molecule
The newest 5 of 5 written questions. Open one to see it on the real paper.
- 0973/42 · May/June 2025 · Q6a(i)[1]
Deduce the molecular formula of molecule X. molecular formula of X =
See it on the paper → - 0973/42 · May/June 2025 · Q6a(ii)[1]
Explain why molecule X is not a hydrocarbon.
See it on the paper → - 0973/31 · October/November 2024 · Q11a(i)[1]
State the total number of atoms in a molecule of ethene.
See it on the paper → - 0973/31 · October/November 2024 · Q11a(ii)[1]
State the formula of ethene.
See it on the paper → - 0973/31 · October/November 2021 · Q2a(iii)[1]
Calcium carbonate has the formula CaCO 3 . State the number of different elements present in calcium carbonate.
See it on the paper →
What examiners said
There were a wide variety of incorrect responses. Occasionally, candidates miscounted the number of hydrogen atoms.
— Examiner report, May/June 2025, 0973/42 Q6(a)(i) (Cambridge)
This question was answered well with many candidates recognising that hydrocarbons only consist of carbon atoms and hydrogen atoms.
— Examiner report, May/June 2025, 0973/42 Q6(a)(ii) (Cambridge)
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