Recall: Molarity is the ratio of moles of solute to volume of the solution in Liters.
We first need to determine the moles of Ritalin before we can calculate the molarity.
From the structure of Ritalin, we can determine it's molecular formula: C14H19NO2. The molar mass of Ritalin is:
Ritalin is the trade name of a drug, methylphenidate, used to treat attention-deficit/hyperactivity disorder in young adults. The chemical structure of methylphenidate is shown in the figure below.
A tablet contains a 35.0-mg dose of Ritalin. Assuming all the drug ends up in the bloodstream, and the average man has a total blood volume of 5.0 L, calculate the initial molarity of Ritalin in a mans bloodstream.
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