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20-10-2022
Chemistry

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2. Rubidium is a soft, silvery-white metal that has two common isotopes, 85 Rb and Rb. If the
abundance is 72.17% of 85Rb (84.9118 amu) and 27.83% of 87Rb (86.9092 amu), what is the
average atomic mass of rubidium? Show your work to get credit.

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