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

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Question 7

Aluminium reacts with bromine as shown.

2Al+3Br2→2AlBr32\text{Al} + 3\text{Br}_2 \rightarrow 2\text{AlBr}_32Al+3Br2​→2AlBr3​

Relative atomic mass (ArA_rAr​): Al=27\text{Al} = 27Al=27

Relative formula masses (MrM_rMr​): Br2=160\text{Br}_2 = 160Br2​=160, AlBr3=267\text{AlBr}_3 = 267AlBr3​=267

A production batch contains 8.1 g of aluminium and 32.0 g of bromine. The target is to produce at least 40.0 g of aluminium bromide.

Calculate the maximum mass of aluminium bromide that can be produced.

State whether the production target can be met. Give a reason for your answer.

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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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