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Homework Help: PLEASE HELP ME! CHEMISTRY

Posted by Aidan on Monday, August 29, 2011 at 11:14pm.

Naturally occurring cobalt consists of only one isotope, cobalt59, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt60, relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.8155 sample of cobalt has an apparent "atomic mass" of 58.9901.

FIND THE MASS OF COBALT60 IN THIS SAMPLE.

I DONT KNOW WHERE TO START, I TRIED DOING CONVERSION FACTORS BUT I CANT GET A REASONABLE MASS.

HELP?

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