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Atoms and reactions

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Question 11

A mass spectrometer is used to analyse a gaseous sample of a chlorofluorocarbon (CFC) refrigerant. The mass of a single molecule of this CFC is determined to be 1.736 × 10-22 g.

What is the molecular formula of this CFC?

(Use Avogadro's constant, L=6.02×1023 mol−1L = 6.02 \times 10^{23}\text{ mol}^{-1}L=6.02×1023 mol−1)

A

CHF2Cl\text{CHF}_2\text{Cl}CHF2​Cl

B

CF2Cl2\text{CF}_2\text{Cl}_2CF2​Cl2​

C

CF3Cl\text{CF}_3\text{Cl}CF3​Cl

D

CFCl3\text{CFCl}_3CFCl3​

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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