A-LevelChemistryAtoms, molecules and stoichiometryFeb/Mar 2022Paper 1 Q141 Mark

Which statement about atoms and molecules is correct?

Q: What topic does this question test?

This question tests Atoms, molecules and stoichiometry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

AThe molecular formula of a compound is the simplest whole number ratio of atoms of each element in the compound.

BOne mole of any substance contains 6 × 10²³ atoms.

CThe relative atomic mass of an element is the ratio of the average mass of one atom of the element to the mass of an atom of carbon-12.

DThe relative formula mass of a compound is the sum of the individual atomic masses of all the atoms in the formula.

✓ Correct Answer

The correct answer is D: The relative formula mass of a compound is the sum of the individual atomic masses of all the atoms in the formula.

📋 Examiner Report & Trap Analysis

Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...

🎯 Mark Scheme Breakdown

Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.

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About This A-Level Chemistry Question

Topic

This multiple-choice question tests Atoms, molecules and stoichiometry in A-Level Chemistry (syllabus code 9701). It is worth 1 mark.

Source

This question appeared in the Cambridge A-Level Chemistry Feb/Mar 2022 examination, Paper 1 Variant 2.

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