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3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

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Question 17

A technician heats magnesium granules in an open metal dish. After the reaction has finished, the dish is allowed to cool. The mass of the dish and its contents is measured before and after heating.

StageBalance reading in g
Before heating63.45
After heating64.25
a.

Calculate the increase in the balance reading.

[1]
b.

Suggest why the balance reading increased.

[1]
c.

State what happens to the atoms during the reaction.

[1]
Markscheme

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

95 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.

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