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2.1 Purity and separating mixtures

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Question 25

The table shows the number of atoms of each element in one molecule of compound X.

ElementNumber of atoms
carbon6
hydrogen12
oxygen2
a.

Calculate the empirical formula of compound X.

[1]
b.

Give one possible molecular formula, other than C6H12O2\mathrm{C_{6}H_{12}O_{2}}C6​H12​O2​, for a different compound with the same empirical formula.

Explain why your formula has the same empirical formula as compound X.

[2]
Markscheme

2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

102 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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