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Amount of substance

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Question 11

Complete combustion of 0.00300 mol of an organic acid produced 0.0120 mol of carbon dioxide.

The same amount of the acid required 15.0 cm3 of 0.400 mol dm−3 NaOH (aq)0.400\text{ mol dm}^{-3}\ \text{NaOH (aq)}0.400 mol dm−3 NaOH (aq) for complete neutralisation.

Which could be the formula of the acid?

A

CH3CH2CH2COOH\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}CH3​CH2​CH2​COOH

B

HOOCCH2COOH\text{HOOCCH}_2\text{COOH}HOOCCH2​COOH

C

HOOCCH2CH2COOH\text{HOOCCH}_2\text{CH}_2\text{COOH}HOOCCH2​CH2​COOH

D

CH3CH2COOH\text{CH}_3\text{CH}_2\text{COOH}CH3​CH2​COOH

Markscheme

Amount of substance Questions

  1. A Level
  2. /Chemistry
  3. /Amount of substance

79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.

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