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Nalorphene `(C_(19)H_(22)NO_(3))`, similar to morphine , is used to combat withdrawal symptoms in narcotic users. The dose of nalorphene generally given is `1.5 mg`. Calculate the mass of solution of `1.5xx10^(-3)m` aqueous solution required for the above dose. |
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Answer» Correct Answer - `W_(solution)=3.2015g` Molecular mass of Nalorphene`(C_(19)H_(22)NO_(3))` `=19xx12+1xx22+14+3xx16` `=312g mol^(-1)` `m=(W_(2)xx1000)/(Mw_(2)xxW_(1))` `1.5xx10^(-3)(1.5xx10^(-3)gxx10000)/(312xxW_(1))` `W_(1)=(1.5)/(3.12xx1.5xx10^(-3))=(10^(3))/(312)=3.2g` Weight of `H_(2)O=3.2g` Weight of solution `=3.2+1.5xx10^(-3)` `=3.2 +0.0015=3.2015g` . |
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