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Math Help - Help with Energy problem

  1. #1
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    Help with Energy problem

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  2. #2
    MHF Contributor arbolis's Avatar
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    It's because the atomic mass is not expressed in kilograms. You have to translate it... Think about it : Can an atom have a mass of 39 kilograms!!!!!?
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    Quote Originally Posted by arbolis View Post
    It's because the atomic mass is not expressed in kilograms. You have to translate it... Think about it : Can an atom have a mass of 39 kilograms!!!!!?
    I just typed the problem in wrong. See corrected



    6.022 x 10^23 ???
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  4. #4
    MHF Contributor arbolis's Avatar
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    You still have the same problem with the mass. An atom is much, much less heavy than 0.04 kg.
    Take a look at Atomic mass - Wikipedia, the free encyclopedia, especially at the
    "Conversion factor between atomic mass units and grams"

    paragraph.
    EDIT :
    6.022 x 10^23 ???
    Yes, you have to use the Avogadro's number.
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