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Chemistry · May / June 2018 · Paper 12 · Question 12

5070The mole and the Avogadro constant

A mass of 63 g of potassium manganate(VII), KMnO4, is needed for the complete oxidation of 23 g of ethanol, C2H5OH, under acidic conditions. How many moles of ethanol can be completely oxidised by one mole of potassium manganate(VII) under these conditions?

  1. A0.37
  2. B0.80
  3. C1.00
  4. D1.25

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Correct answer: D. 1.25

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