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July 23, 2014

Homework Help: chemistry

Posted by neha on Tuesday, February 9, 2010 at 10:08am.

A 1.994 g sample of gypsum, a hydrated salt of calcium sulfate, CaSO4, is heated at a temp. above 170 C in a crucible until a constant mass is reached. The mass of anhydrous CaSO4 is 1.577g. what is percent by mas of water in the hydrated calcium sulfate salt

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