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Homework Help: How many moles are in 1kg ice/water?

  1. Feb 21, 2008 #1
    How many moles are in 1kg ice/water?
  2. jcsd
  3. Feb 21, 2008 #2
    This is a very simple molar mass problem.

    First, convert kg to g.
    Then, multiply the number of grams by the mol/molar mass ratio. Use the molar mass of H2O.

    Since grams will be being multiplied by #mols/grams, the grams cancel, leaving the number of mols in 1 kg of water/ice.
  4. Feb 22, 2008 #3
    Here is another simple explanation:

    First convert the mass in kg to g ( 1kg=1000g). Now 18g of H20 is equivalent to 1 mole. Hence, 1000g of it would be equal to 1000/18 moles. This comes out be 55.55 moles. Thus 1 kg of water or ice has 55.55 moles of H20.
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