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March 26, 2017

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An unknown element Q has two known isotopes: 61Q and 62Q. If the average atomic mass is 61.4 amu, what are the relative percentages of the isotopes?

  • Chemistry - ,

    Let x = fraction of 61Q
    Then 1-x = fraction of 62Q
    =============================
    x*61 + (1-x)*62 = 61.4
    Solve for x and 1-x, then convert to percent.

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