A-LevelChemistryAtoms, molecules and stoichiometry9701/12 · May/June 2020 · Q91 Mark

The complete combustion of 2 moles of an alkane produces 400 dm³ of carbon dioxide measured at 301 K and 1 × 10⁵ Pa. Carbon dioxide can be assumed to behave as an ideal gas under these conditions. What is the formula of the alkane?

AC8H18

BC16H34

CC20H42

DC40H82

✓ Correct answer

A: C8H18

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Topic: Atoms, molecules and stoichiometry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2020 Paper 1 Variant 2, question 9.

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