The density of $2M$ solution of sodium chloride (NaCl) $1.13\; g\; mol/litre$. Calculate molality of the solution. $M= 2$ mol per litre.

Question

$\begin{array}{1 1} (a)\; 1.9743\;Molality \\(b)\; 1.843\;Molality \\ (c)\; 1.927\;Molality \\ (d)\; 1.456 \;Molality \end{array}$