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1 markThe Mole Concept

CAPE Chemistry Unit 1 · 2005 · Paper 1 · Question 1(a)(ii)

A chemist is given 1.08 g of compound X containing carbon, hydrogen, and one other element, with relative molecular mass 108. Complete combustion yields 1340 cm³ of CO₂ and 448 cm³ of NO₂ at s.t.p.

Define molecular formula.

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Other parts of this question

  1. 1(a)(i)Define empirical formula.[1 mark]
  2. 1(b)Give an example of a compound for which the molecular formula is different from the empirical formula, writing the respective formulae.[2 marks]
  3. 1(c)Use the data provided to determine the molecular formula of X.[6 marks]

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