Question

Calculate the molality of a solution obtained by dissolving $15.87g$ ethyl alcohol $\left(C_2{H}_{5}OH\right)$ in $168g$ of $H_{2}O$

Answer 1

Answer: 2

$m=\frac{W_2\times 1000}{M_{w_2}\times W_1}=\frac{15.87\times 1000}{46\times 168}=2.05$