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A.) What is the molar mass of heroin? B.) How many molecules of heroin are in...

A.) What is the molar mass of heroin?
B.) How many molecules of heroin are in 0.332g of heroin?
C.) 0.335g of oxygen are discovered in a sample of heroin. How many grams of heroin have been found?
Chemical formula for Heroin is C21H23NO5
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