Chemistry - Concentration Terms Question with Solution | TestHub

$w=1000 \mathrm{g }\left({\mathrm{H}}_2\mathrm{O}\right); \mathrm{n(solute)}=1\mathrm{ }\mathrm{m}\mathrm{o}\mathrm{l}$
(as 1 molal aqueous solution implies 1 mol of solute in 1 kg of water)

$\mathrm{N\; (water) }=\frac{W}{M}=\frac{1000}{18}=55.55$

Whereas

$n=$number of moles of solute

$N=$number of moles of water$\left({\text{H}}_{\text{2}}\text{O}\right)$

$X_{\mathrm{s}\mathrm{o}\mathrm{l}\mathrm{u}\mathrm{t}\mathrm{e}}=\frac{n}{n+N}=\frac{1}{1+55.55}$

$=0.018$