Gallium has two natural occuring isotopes: Ga-69 with 68.9256 amu and a natural abundance of 60.11%, and Ga-71 with mass 70.9247 amu and a n

Question

Gallium has two natural occuring isotopes: Ga-69 with 68.9256 amu and a natural abundance of 60.11%, and Ga-71 with mass 70.9247 amu and a natural abundance of 39.8%. Calculate the atomic mass of gallium.

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Farah 4 years 2021-07-11T23:22:17+00:00 1 Answers 5 views 0

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  1. Acacia
    0
    2021-07-11T23:23:22+00:00
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    To calculate the atomic mass, add each amu multiplied by its relative abundance and divide it all by 100

    Ar (Ga) = (68.9256×60.11) + (70.9247×39.8)
    /100

    = 4,143.12 + 2,822.80 /100

    = 69.66

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