Question
Sat June 16, 2012 By: Priyanka Kumar

nalorphene ( C19H21NO3) is used to combat withdrawal symptoms in narcotic users.dose of nalorphene generally given is 1.5mg calculate the mass of 1.5x 13 to the power -3 m aqueous solution required for the above dose.

Expert Reply
Wed June 20, 2012
molality =  (mass of solute / molar mass) / mass of solvent in kg
1.5 X 10-3 = (1.5 x 10-3 /311) /mass of solvent
Mass of solvent = .0032 kg or 3.2 g
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