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1 gram H / 1 atomic mass unit (grams ) What is wrong with the math here ?

  1. Dec 5, 2011 #1

    morrobay

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    Gold Member

    One atomic mass unit = .001660565 x 10-24 grams
    One gram Hydrogen / .001660565 x10-24 grams = 6.02 x 10 26 ?

    This should be Avogadros number 6.02 x 1023
    what is the mistake here ?
     
  2. jcsd
  3. Dec 5, 2011 #2

    phyzguy

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    It appears you're mixing grams and kilograms. 1 AMU = 1.6x10^-24 g = 1.6x10-27 kg.
     
  4. Dec 5, 2011 #3

    morrobay

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    Thanks , right, I moved the decimal in the wrong direction when converting kg to g
    1 amu = 1.66 x 10-27 kg = 1660 x 10 -27 grams
    = 1.66 x 10-24 grams
     
    Last edited: Dec 5, 2011
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