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

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Question 48
F72%

A student repeated the same measurement several times and calculated the mean. Which statement about the results is correct?

[1]
A

A larger range shows a smaller uncertainty in the mean.

B

A smaller range shows a smaller uncertainty in the mean.

C

The uncertainty is equal to the largest measurement taken.

D

The uncertainty is equal to the mean of the measurements.

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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