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11/09/2020 6:13 pm
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Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose of nalorphene generally given is 1.5 mg. Calculate the mass of 1.5 x 10-3m aqueous solution required for the above dose.
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11/09/2020 6:14 pm
Molality = Moles of solute/Mass of solvent (in kg)
0.15 = Moles of benzoic acid/(250/1000)
Moles of benzoic = (0.15 × 250)/1000 = 0.0375
Molar mass of benzoic acid is 122 g/mol respectively.
Amount of benzoic acid = 0.0375 × 122 = 4.575 g