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Atoms and reactions

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Question 7

Which sodium compound contains the greatest percentage by mass of sodium?

[Relative atomic masses, ArA_rAr​: H=1.0\text{H} = 1.0H=1.0; C=12.0\text{C} = 12.0C=12.0; O=16.0\text{O} = 16.0O=16.0; Na=23.0\text{Na} = 23.0Na=23.0; Cl=35.5\text{Cl} = 35.5Cl=35.5]

A

sodium oxide

B

sodium chloride

C

sodium hydroxide

D

sodium carbonate

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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