Chemistry

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How do you calculate the atomic mass of an element when an isotopic composition is given
99.985% 1H; 0.015% 2H
Please show steps to solve!

  • Chemistry -

    The idea is the sum of the parts is equal to the whole.
    100*avgatomicmass= 99.985*1 + .015*2

    solve for avgatomicmass.

  • Chemistry -

    Bob please help further

  • Chemistry -

    How???

  • Chemistry -

    divide both sides by 100.
    then on the right, muliply the terms and add.

  • Chemistry -

    Can you please show how in long form so I know how to do it! Thanks

  • Chemistry/ bob -

    Help please see last entry

  • Chemistry -

    Can you please show how in long form so I know how to do it! Thanks

  • Chemistry -

    ANYONE!!!

  • Chemistry -

    Here is what Bob Pursley wrote.
    100*avgatomicmass= 99.985*1 + .015*2

    Here is a rewritten form of his equation although his instructions for solving the equation are simple.
    100*x = [99.9985*1 + 0.015*2]
    solve for x which is the average atomic mass.

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