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26 February, 08:48

A hypothetical element x has 3 naturally occurring isotopes: 41.20% of 21x, with an atomic weight of 21.016 amu, 50.12% of 22x, with an atomic weight of 21.942 amu, and 8.68% of 24x, with an atomic weight of 23.974 amu. on the basis of these data, calculate the average atomic weight of element x. report your answer to two decimal places.

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  1. 26 February, 09:09
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    The average atomic weight is calculated by adding up the products of the percentage abundance and atomic weight. In this item, we have the equation,

    A = (0.412) (21.016 amu) + (0.5012) (21.942 amu) + (0.0868) (23.974 amu)

    Simplifying the operation will give us the answer of 21.74 amu.

    Answer: 21.74 amu
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