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OpenStudy (anonymous):
Gallium is composed of two naturally occurring isotopes: Ga-69 (60.108%) and Ga-71 . The ratio of the masses of the two isotopes is 1.0290. What is the mass of Ga-69
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OpenStudy (aaronq):
60.108(x) + 39.892(1-x)=1.0290 solve for x
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