A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · Feb/Mar 2023 · Q371 Mark

An aqueous solution contains 4.00 g of a carboxylic acid, Q. When this solution reacts with an excess of magnesium, 380 cm³ of gas is produced, measured at s.t.p. What is the relative formula mass of Q?

A59

B118

C126

D236

✓ Correct answer

B: 118

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2023 Paper 1 Variant 2, question 37.

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