A sample of $0.125 \mathrm{~g}$ of an organic compound when analyzed by Duma's method yields $22.78 \mathrm{~mL}$ of nitrogen gas collected over $\mathrm{KOH}$ solution at $280 \mathrm{~K}$ and $759 \mathrm{~mm}\, \mathrm{Hg}$. The percentage of nitrogen in the given organic compound is __________. (Nearest integer)

Given :

(a) The vapour pressure of water of $280 \mathrm{~K}$ is $14.2 \mathrm{~mm} \,\mathrm{Hg}$.

(b) $\mathrm{R}=0.082 \mathrm{~L}$ atm $\mathrm{K}^{-1} \mathrm{~mol}^{-1}$