Homework Help: chemistry

Posted by Jules on Sunday, November 25, 2012 at 8:45pm.

a student heated 3.48 g of a pure sample of CaSO4 2 H2O until all the water of hydration was expelled. what was the mass of the residue?

chemistry - DrBob222, Sunday, November 25, 2012 at 9:20pm
What's the percent H2O in CuSO4.2H2O?
%H2O x 3.48 = ?

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