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6.3 Interpreting and interacting with earth systems

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Question 20

An emergency shelter prepares drinking water in a storage tank.

The tank contains 40 m340\ \mathrm{m^{3}}40 m3 of water. A mass of 36 g of chlorine is added.

1 m3=1000 dm31\ \mathrm{m^{3}} = 1000\ \mathrm{dm^{3}}1 m3=1000 dm3 1 g=1000 mg1\ \mathrm{g} = 1000\ \mathrm{mg}1 g=1000 mg

What is the dose of chlorine in mg\mathrm{mg}mg per dm3\mathrm{dm^{3}}dm3?

[1]
A

0.0009 mg per dm3\mathrm{dm^{3}}dm3

B

1.1 mg per dm3\mathrm{dm^{3}}dm3

C

900 mg per dm3\mathrm{dm^{3}}dm3

D

0.9 mg per dm3\mathrm{dm^{3}}dm3

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6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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