CHEMISTRY · Multi-part · A Level · Chemistry · Amount of substance · Amount of substance
Problem
A researcher requires precisely 2.50×10−2mol of pure caffeine, C8H10N4O2, for a metabolic study. Safety documentation mandates that the mass of caffeine be reported both in milligrams (mg) and in ounces (oz). (For unit conversion, 1oz=28.35g.)
(a) Calculate the mass, in milligrams, corresponding to the required amount of caffeine.
(b) Convert the mass obtained in part (a) to ounces and report the value to three significant figures.