Naturally occurring cobalt has an atomic mass of 58.9332 amu. A sample of cobalt with a total mass of 8.56 g and an apparent atomic mass of 59.0509 amu was found to be contaminated with Co-60. Co-60 is a synthetic radioisotope of cobalt used as a radiation therapy of some cancer. The atomic mass of the isotope, Co-60, is 59.9338 amu. Read answer

Naturally occurring cobalt has an atomic mass of 58.9332 amu. A sample of cobalt with a total mass of 8.56 g and an apparent atomic mass of 59.0509 amu was found to be contaminated with Co-60. Co-60 is a synthetic radioisotope of cobalt used as a radiation therapy of some cancer. The atomic mass of the isotope, Co-60, is 59.9338 amu.
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