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OpenStudy (anonymous):
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb, what is the average atomic mass of rubidium?
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OpenStudy (anonymous):
whats the abundance of 87 Rb
OpenStudy (anonymous):
then u can find the av atomic mass of Rb
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