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The main ingredient of a particular cough medicine, that can be in syrup or tablet form, is an organic compound with the name of dextromethorphan. The formula for this compound is C18H25NO. Your mom instructs you to go to the pharmacy to buy cough medicine and to ensure that you get 3.99 x 1021 molecules of dextromethorphan. However, at the pharmacy, the label of the package only states the amount of the drug in grams. If there are 12 tablets in the package and 0.05 grams of dextromethorphan in each tablet, how many packages of the cough medicine would you need to buy?
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