7. The drug tolbutamine (molar mass 270 g/mol) has a molar absorption coefficient of 703 at 262 nm. One tablet is dissolved in water and the volume of the solution is adjusted to 2 liters. The optical density of the resulting solution is 0.687 in the UV range at 262 nm (1 cm cuvette). How many grams of tolbutamine are in a tablet? Answer: 0.5280 g

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