Homework Help: chemistry

Posted by chris on Friday, March 30, 2012 at 8:40am.

A compound weighing 115 g contains 68.3 g of carbon, 13.2 g of hydrogen, 15.9 g of nitrogen, and some amount of oxygen. What is the mass percent of oxygen in the compound?

chemistry - DrBob222, Friday, March 30, 2012 at 3:54pm
g oxygen = 115-68.3-13.2-15.9 = ?
% oxygen = (?g oxygen/115)*100 = ?
chemistry - Anonymous, Thursday, September 6, 2012 at 12:45pm
ahahah
chemistry - mia, Thursday, September 27, 2012 at 10:39am
15.30%

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