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

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

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Question 13

An unmanned deep-sea explorer vehicle uses a magnesium-based fuel cell. The vehicle requires an average of 4.75 kJ4.75\text{ kJ}4.75 kJ of energy to travel 1 m1\text{ m}1 m through water. The magnesium reaction inside the fuel cell yields an energy content of 380 kJ/mol380\text{ kJ/mol}380 kJ/mol. Calculate the number of moles of magnesium required by the vehicle to complete a survey mission of 32 km32\text{ km}32 km.

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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

38 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 (HT only), 3.2.2 Amounts of substances in equations (HT only), 3.2.3 Using moles to balance equations (HT only), 3.2.4 Limiting reactants (HT only), and 3.2.5 Concentration of solutions. Each one has a worked solution and a mark scheme showing where the marks go.

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