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6.3 Interpreting and interacting with earth systems

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Question 53
F

A water treatment works adds chlorine to water at a dose of 1.5 mg per dm3\mathrm{dm^{3}}dm3.

It treats 4000 m34000\ \mathrm{m^{3}}4000 m3 of water each day.

1 m3=1000 dm31\ \mathrm{m^{3}} = 1000\ \mathrm{dm^{3}}1 m3=1000 dm3 1 kg=1 000 000 mg1\ \mathrm{kg} = 1\,000\,000\ \mathrm{mg}1 kg=1000000 mg

What mass of chlorine does it add each day?

[1]
A

0.006 kg

B

6 kg

C

6000 kg

D

6 000 000 kg

Markscheme

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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