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Chemistry

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An unknown element Q has two known isotopes: 60Q and 63Q. If the average atomic mass is 60.5 amu, what are the relative percentages of the isotopes?

  • Chemistry -

    There is little point in posting the same question twice within a couple of minutes.

    Let the fraction of 60Q be x and therefore the fraction of 63Q is 1-x.

    60x +(1-x)63=60.5

    can you take it from here?

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