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

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Question 1
H79%

The relative formula mass (MrM_rMr​) of methane, CH4\text{CH}_4CH4​, is 16. The Avogadro constant is 6.02 × 1023 per mole.

How many molecules are present in 8.0 g of methane?

[1]
A

4.82×10244.82 \times 10^{24}4.82×1024

B

1.20×10241.20 \times 10^{24}1.20×1024

C

6.02×10236.02 \times 10^{23}6.02×1023

D

3.01×10233.01 \times 10^{23}3.01×1023

Markscheme

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

40 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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