Problem: Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.The average atomic mass of Ga is 69.72 amu. Calculate the abundance of each isotope.

FREE Expert Solution

Atomic mass = [mass×f.a.]isotope 1 + [mass×f.a.]isotope 2


atomic mass = 69.72 amu

isotope 1: mass = 68.926 amu           f.a. = 1 - x

isotope 2: mass = 70.925 amu          f.a. = x


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Problem Details

Gallium (Ga) consists of two naturally occurring isotopes with masses of 68.926 and 70.925 amu.

The average atomic mass of Ga is 69.72 amu. Calculate the abundance of each isotope.

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