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    pop000's Avatar
    pop000 Posts: 352, Reputation: 6
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    #1

    Feb 27, 2011, 05:01 AM
    Calculate mass of Fe 56
    I need to Calculate which part of the total mass of atom Fe 56 responsible
    1)Neutron
    2)proton
    3)electron
    I know that in this atom there 26 proton and electron and 30 Neutron
    But how can I know the mass of everyone of them

    May I need to use in this Formula for proton:26*1.672×10-27
    And the same with electron and Neutron (sure everyone of them have his own Formula )

    Thanks :)
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #2

    Feb 27, 2011, 07:00 PM
    Yes, that's right.
    pop000's Avatar
    pop000 Posts: 352, Reputation: 6
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    #3

    Feb 28, 2011, 06:27 AM
    Comment on jcaron2's post
    OK so I tried to do like this to Calculate the mass of proton here and I did:26*1.673*10^-27
    and the answer need to be 0.4639
    what I do wrong ?
    thanks.
    jcaron2's Avatar
    jcaron2 Posts: 986, Reputation: 204
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    #4

    Feb 28, 2011, 07:55 AM
    You calculated the mass correctly. However, the question didn't ask what was the mass. It asked what fraction of the total mass was contributed by each.
    pop000's Avatar
    pop000 Posts: 352, Reputation: 6
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    #5

    Feb 28, 2011, 08:41 AM
    Comment on jcaron2's post
    Correct now I see it.

    Thanks.
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