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

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Question 7
H

A student measured the same volume of a solution four times and obtained 22.2 cm3, 22.4 cm3, 22.6 cm3 and 22.8 cm3. The mean volume is 22.5 cm3. Which value gives the mean with its uncertainty?

[1]
A

22.5±0.15 cm322.5 \pm 0.15\ \text{cm}^322.5±0.15 cm3

B

22.5±0.20 cm322.5 \pm 0.20\ \text{cm}^322.5±0.20 cm3

C

22.5±0.30 cm322.5 \pm 0.30\ \text{cm}^322.5±0.30 cm3

D

22.5±0.60 cm322.5 \pm 0.60\ \text{cm}^322.5±0.60 cm3

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

40 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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