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10.4 The Haber process and the use of NPK fertilisers

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Question 16

A quality-control laboratory is checking the composition of calcium nitrate, Ca(NO3)2\text{Ca(NO}_3\text{)}_2Ca(NO3​)2​.

Relative atomic masses: Ca=40\text{Ca} = 40Ca=40, N=14\text{N} = 14N=14, O=16\text{O} = 16O=16.

The laboratory report must state the percentage by mass of oxygen in the compound.

Calculate this percentage.

Give your answer to 3 significant figures.

[3]
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10.4 The Haber process and the use of NPK fertilisers Questions

  1. GCSE
  2. /Chemistry
  3. /10.4 The Haber process and the use of NPK fertilisers

71 exam-style questions on AQA GCSE Chemistry 10.4 The Haber process and the use of NPK fertilisers, covering 10.4.1a The Haber process, 10.4.1b Equilibrium and rate in the Haber process, and 10.4.2 Production and uses of NPK fertilisers. Each one has a worked solution and a mark scheme showing where the marks go.

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