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July 1, 2015

Homework Help: AP Chemistry

Posted by Patrick on Wednesday, September 19, 2007 at 4:47pm.

(a)calculate the mass percent of carbon in the hydrated form of the solid that has the formula BeC2O4 X 3 H2O (s).

I divided 24.02 g by 151.08 g and got .16, or 16%. is that correct?

Also, I'm having trouble with this follow up question.

When heated to 220 degrees C, BeC2O4 X 3 H2O dehydrates completely as respresented: BeC2O4 X 3 H2O (s)--> BeC2O4 + 3H20 (g). If 3.21 g of BeC2O4 X 3 H2O is heated to 220 degrees C, calculate the:

(i) mass of BeC2O4 (s) formed
(ii) volume of H2O (g) released, measured at 220 degrees C and 735 mm Hg

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