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

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Question 23

A reaction in a flask produces a gas. The flask is connected by an airtight tube to a gas syringe. The flask stands on a balance, but the gas syringe rests on the bench. The balance reading falls as gas enters the syringe.

Which change to the experiment would keep the balance reading constant during the reaction?

[1]
A

Using a gas syringe with a wider barrel

B

Replacing the connecting tube with a shorter tube

C

Putting the flask and gas syringe together on the balance

D

Taking balance readings at shorter time intervals

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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