Question: Unknown element X has two naturally occurring isotopes. The average mass of element X is 79.904amu. If 50.54% of X is found as X79 (78.9183

Unknown element X has two naturally occurring isotopes. The average mass of element X is 79.904amu. If 50.54% of X is found as X79 (78.9183 amu), what is the mass of the other isotope? 79.97amu 79.82amu 82.91 amu 81.93amu 80.91amu

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