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2 December, 16:56

Calculate the atomic mass of gallium if gallium has 2 naturally occurring isotopes with the following masses and natural abundances: Ga-69 68.9256 amu 60.11% Ga-71 70.9247 amu 39.89%?

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  1. 2 December, 18:44
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    69.7 amu

    Explanation:

    To get the atomic mass of Gallium, we use the relative abundance of the isotopes.

    This is used as follows:

    [60.11/100 * 68.9256] + [39.89/100 * 70.9247]

    = 41.43117816 + 28.29186283 = 69.72304093 amu
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