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An old-fashioned glass apothecary jar contains patent medicine. The neck is closed with a rubber stopper that is 20mm tall, with a diameter of 10mm
An old-fashioned glass apothecary jar contains patent medicine. The neck is closed with a rubber stopper that is 20mm tall, with a diameter of 10mm at the bottom end, widening to 20mm at the top end. The molar concentration of medicine vapor in the stopper is 2103kmol/m3 at the bottom surface and is negligible at the top surface. If the mass diffusivity of the medicine vapor in rubber is 0.2109m2/s, find the rate ( kmol/s ) at which vapor exits through the stopper. If the molecular weight of the medicine is 50g/mol, estimate the amount of medicine that would escape from the bottle in one year. If the density of the medicine is 1g/ml and the bottle has a crosssectional area of 1103m2, what is the decrease in liquid level in one year? SCHEMA]
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