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OpenStudy (pottersheep):
Chemistry / Math (simple) problem help please ! Oxygen - 16 weighs 15.995u and oxygen - 18 weighs 17.999u. Oxygen - 17 makes up for 0.037% of oxygen. (So that means O-16 and O - 18 make up for 99.963%) Calculate the percentage abundance of the other 2 isotopes, using average atomic mass of 15.9994
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OpenStudy (pottersheep):
The answer is supposed to be 99.762 and 0.201 but that's not what I get :s
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