Wednesday
April 16, 2014

Homework Help: chemistry

Posted by taja on Tuesday, September 17, 2013 at 11:21pm.

A 71.1 g sample of an unknown compound contains 10.1 g of hydrogen. What is the percent by mass of hydrogen in the compound?

When mercury oxide is heated, it decomposes into mercury and oxygen. If 32.8 g of mercury oxide decomposes, producing 3.0 g oxygen, what is the percent by mass of mercury in mercury oxide?

can you explain how you got your answer please NEEDS HELP

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