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September 2, 2015

Homework Help: chemistry

Posted by Michael on Wednesday, September 29, 2010 at 2:16am.

A sample of 0.6760 g of an unknown compound containing barium ions (Ba2+) is dissolved in water and treated with an excess of Na2SO4. If the mass of the BaSO4 precipitate formed is 0.1405 g, what is the percent by mass of Ba in the original unknown compound?

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