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

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Question 4

Carbon monoxide reacts with oxygen to form carbon dioxide.

2CO+O2→2CO22\text{CO} + \text{O}_2 \rightarrow 2\text{CO}_22CO+O2​→2CO2​

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

A reaction mixture contains 14.0 g of carbon monoxide and 24.0 g of oxygen.

What mass of the reactant in excess is left over when the reaction stops?

[1]
A

8.0 g8.0\ \text{g}8.0 g

B

10.0 g10.0\ \text{g}10.0 g

C

16.0 g16.0\ \text{g}16.0 g

D

3.5 g3.5\ \text{g}3.5 g

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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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