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9.1 The composition and evolution of the Earth's atmosphere

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Question 9

An air-monitoring station measures the percentage by volume of each gas in a sample of clean, dry air.

Which reading should the station record for oxygen?

[1]
A

About 99% by volume

B

Well under 1% by volume

C

About 80% by volume

D

About 20% by volume

Markscheme

9.1 The composition and evolution of the Earth's atmosphere Questions

  1. GCSE
  2. /Chemistry
  3. /9.1 The composition and evolution of the Earth's atmosphere

79 exam-style questions on AQA GCSE Chemistry 9.1 The composition and evolution of the Earth's atmosphere, covering 9.1.1 The proportions of different gases in the atmosphere, 9.1.2 The Earth's early atmosphere, 9.1.3 How oxygen increased, and 9.1.4 How carbon dioxide decreased. Each one has a worked solution and a mark scheme showing where the marks go.

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