Problem: Gallium has two naturally occurring isotopes: gallium-69 (isotopic mass = 68.926 amu) and gallium-71 (isotopic mass = 70.925 amu). The atomic weight of gallium is 69.723 amu.Calculate the percent abundance of gallium-69.

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Gallium has two naturally occurring isotopes: gallium-69 (isotopic mass = 68.926 amu) and gallium-71 (isotopic mass = 70.925 amu). The atomic weight of gallium is 69.723 amu.

Calculate the percent abundance of gallium-69.

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