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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 3

Heptamolybdate ions, [Mo7O24]6−[\text{Mo}_7\text{O}_{24}]^{6-}[Mo7​O24​]6−, are large polyoxometalate clusters used in industrial catalysis.

Calculate the number of [Mo7O24]6−[\text{Mo}_7\text{O}_{24}]^{6-}[Mo7​O24​]6− ions that can be formed from a sample containing 0.350.350.35 moles of molybdenum (Mo\text{Mo}Mo) atoms.

The Avogadro constant =6.02×1023 per mole= 6.02 \times 10^{23}\text{ per mole}=6.02×1023 per mole.

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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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