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3.2 Use of amount of substance in relation to masses of pure substances

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Question 55

A technician puts the two gas samples shown in the table into the same sealed container. The gases do not react with each other, and no gas is lost.

SampleSubstanceMass
Asulfur dioxide, SO2\text{SO}_2SO2​16 g
Bcarbon monoxide, CO\text{CO}CO14 g

Relative atomic masses (ArA_rAr​): C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, S=32\text{S} = 32S=32

The Avogadro constant is 6.02 × 1023 per mole.

Calculate the total number of molecules in the container.

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3.2 Use of amount of substance in relation to masses of pure substances Questions

  1. GCSE
  2. /Chemistry
  3. /3.2 Use of amount of substance in relation to masses of pure substances

131 exam-style questions on AQA GCSE Chemistry 3.2 Use of amount of substance in relation to masses of pure substances, covering 3.2.1 Moles, 3.2.2 Amounts of substances in equations, 3.2.3 Using moles to balance equations, 3.2.4 Limiting reactants, 3.2.5a Concentration of solutions, and 3.2.5b Relating mass, volume and concentration. Each one has a worked solution and a mark scheme showing where the marks go.

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