Question

The expression relating molarity $(M)$ of a solution with its molality $( m )$ is
(where $d=$ density, $M_{B}$ mol. wt. of solute)

• A. $m =\frac{1000\, M }{1000\, d + M \,M_{ B }}$
• B. $m =\frac{1000 \,M }{1000\, d - M \,M _{ B }}$
• C. $m =\frac{1000 \,d + M\,M _{ B }}{1000 \,M }$
• D. $m =\frac{1000\, d - M\,M _{ B }}{1000\, M }$

Answer 1

Answer: (B)

$m=\frac{1000\,M }{1000 \,d - M \,M _{ B }}$