Nalorphene ( C 19 H 21 NO 3) similar to morphine, is used to combat withdrawal symptoms in narcotic uses. Dose of nalorphene generally given is 1.5 mg. The mass of 1.5 × 10-3 m aqueous solution required for the above dose is?

Question

Nalorphene ( C 19 H 21 NO 3) similar to morphine, is used to combat withdrawal symptoms in narcotic uses. Dose of nalorphene generally given is 1.5 mg. The mass of 1.5 × 10-3 m aqueous solution required for the above dose is? (A) 5.2 g (B) 3.2 g (C) 4.6 g (D) 1.9 g

Tardigrade Admin · Accepted Answer

w B =1.5 × 10-3 g M B =19 × 12+21 × 1+14+3 × 16=311 We know m =( w B / M B / w A ) × 1000 1.5 × 10-3=(1.5 × 10-3 / 311/wA) × 1000 wA=(1.5 × 10-3/311 × 1.5 × 10-3) × 1000 =(1000/311)=3.2 g .

Q. Nalorphene (C19​H21​NO3​) similar to morphine, is used to combat withdrawal symptoms in narcotic uses. Dose of nalorphene generally given is 1.5mg. The mass of 1.5×10−3m aqueous solution required for the above dose is?

5.2 g

3.2 g

4.6 g

1.9 g

wB​=1.5×10−3g MB​=19×12+21×1+14+3×16=311 We know m=wA​wB​/MB​​×1000 1.5×10−3=wA​1.5×10−3/311​×1000 wA​=311×1.5×10−31.5×10−3​×1000 =3111000​=3.2g.

Q. Nalorphene $(C_{19} H_{21} N O_{3})$ similar to morphine, is used to combat withdrawal symptoms in narcotic uses. Dose of nalorphene generally given is $1.5 m g$ . The mass of $1.5 \times 1 0^{- 3} m$ aqueous solution required for the above dose is?