Multiple Choice
Morphine has the molecular formula C17H19NO3. What is the mass percent of oxygen in morphine?
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An oxide of iron has the formula Fe3O4. What mass percent of iron does it contain
What is the mass % of carbon in dimethylsulfoxide (C2H6SO) rounded to three significant figures?
Calculate the percentage by mass of lead in Pb(NO3)2.
What is the mass percentage of c in caffeine, C8H10N4O2? Provide an answer to two decimal places.