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How many hydrogen atoms are there in a 5 sample of pure hydrogen?

  1. Sep 15, 2010 #1
    How many hydrogen atoms are there in a 5 sample of pure hydrogen?
     
  2. jcsd
  3. Sep 15, 2010 #2

    jtbell

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    Staff: Mentor

    What is a "5 sample"?
     
  4. Sep 15, 2010 #3
    sorry, a 5g sample.
     
  5. Sep 15, 2010 #4

    Mentallic

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    Homework Helper

    Well, can you think of any formulae that can help you find this out? Does Avogadro's number ring a bell?
     
  6. Sep 15, 2010 #5
    This looks like homework.
    Number of atoms = Number of moles * Avogadro's Number
    Use that with the molecular weight of Hydrogen for your answer.
     
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