Naturally occurring cobalt consists of only one isotope,
Chapter 2, Problem 126E(choose chapter or problem)
Naturally occurring cobalt consists of only one isotope, 59Co, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, 60Co, has a relative atomic mass of 59.9338 and is used in radiation therapy for cancer. A 1.5886 g sample of cobalt has an apparent “atomic mass” of 58.9901. Find the mass of 60Co in this sample.
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