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6 May, 01:38

Gallium has two naturally occurring isotopes with the following masses and natural abundances: Isotope Mass (amu) Abundance (%) Ga-69 68.92558 60.108 Ga-71 70.92470 39.892. calculate the atomic mass of gallium

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  1. 6 May, 03:23
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    The formula for determination of atomic mass given the mass of isotopes and relative abundance is:

    Ar = ∑ (mass * abundance) / 100

    Ar = (68.92558 * 60.108 + 70.92470 * 39.892) / 100

    Ar = 69.72306

    The atomic mass of gallium is 69.72306 amu
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