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Atoms and reactions

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Question 117

Which of the following samples contains the greatest total number of atoms?

(Relative atomic masses: H=1.0\text{H} = 1.0H=1.0, C=12.0\text{C} = 12.0C=12.0, N=14.0\text{N} = 14.0N=14.0, O=16.0\text{O} = 16.0O=16.0, S=32.1\text{S} = 32.1S=32.1)

A

128.2 g of SO2128.2\text{ g of } \text{SO}_2128.2 g of SO2​

B

40.0 g of CH440.0\text{ g of } \text{CH}_440.0 g of CH4​

C

140.0 g of N2140.0\text{ g of } \text{N}_2140.0 g of N2​

D

72.0 g of H2O72.0\text{ g of } \text{H}_2\text{O}72.0 g of H2​O

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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