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Homework Help: Simple Question

  1. Sep 13, 2005 #1
    Hi everyone i have a physics question..... the question is:
    Estimate the number of water molecules in a raindrop 1.5 mm in radius.
    i really dont...
    WHAT IS THE MOLAR VOLUME OF WATER????
     
  2. jcsd
  3. Sep 13, 2005 #2

    LeonhardEuler

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    Gold Member

    There is one gram in a mililiter of water and 18 grams in a mole of water, so I'd say there is one eighteenth of a mole of water in a milileter of water.
     
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