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OpenStudy (anonymous):
How many barium ions are there in 2.40mol Ba(NO3) 2?
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OpenStudy (aaronq):
Ba(NO3)2 -> Ba^2+ + 2NO3^- so for every mole of Ba(NO3)2 there is 1 mole of Ba2+ so multiply 2.4 moles by avogadros number to find the number of ions
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