Chemistry Isotopes Solution: Assume that potassium (atomic mass = 39.10) has on...

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Solution: Assume that potassium (atomic mass = 39.10) has only two isotopes, one of which is potassium-39 (isotopic mass = 38.9637 amu, abundance = 93.258%). What is the mass of the second isotope? A. 43.06 amu B. 40.95 amu C. 42.05 amu D. 39.97 amu E. 41.88 amu