Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
Calculate the molar mass of each of these compounds and the mass percent of each element.
(a) PbS, lead(II) sulfide, galena
(b) C2H6, ethane, a hydrocarbon fuel
(c) CH3COOH, acetic acid, an important ingredient in vinegar
(d) NH4NO3, ammonium nitrate, a fertilizer
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