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Sep 26th, 2015
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Question description

Calculate the average atomic mass of rudium, rubidiun has 2 isopotpes 85Rb and 87Rb 85Rb has an atomic number of 84.912amu and occurs at an abundance of 72.17%  87Rb has an atomic mass of 86.909 amu and occurs at an abundance of 27.83%  show your work

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