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Homework Help: Use molar mass of D2O to calculate the density of heavywater

  1. Jan 23, 2015 #1
    1. The problem statement, all variables and given/known data
    how can you go from molar mass to density if its not a gas

    2. Relevant equations
    molar mass = 20.0276 g/mol

    3. The attempt at a solution
  2. jcsd
  3. Jan 23, 2015 #2


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    Hi Cory, welcome to PF!

    Compare the number of D2O molecules in unit volume to that of water. Do the extra protonsEdit: neutrons change the size and interaction between the molecules appreciably with respect to H2O?
    Last edited: Jan 23, 2015
  4. Jan 23, 2015 #3


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    It's not extra protons in D2O, it's extra neutrons.
  5. Jan 23, 2015 #4
    Could you please explaing the problem once again, Cory? What exactly needs to be calculated?
  6. Jan 23, 2015 #5


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    Of course, a great typo!!! Thanks. :)
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