posted by taja .
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
% w/w (m/m) = (grams material/total grams)*100
% = (10.1/71.1)*100 = ?
I think there is a problem with the second part of the question. The numbers don't add up.