Practical Organic Chemistry

A sample of 0.125g of an organic compound when analyzed by Duma's method yields 22.78‌mL of nitrogen gas collected over KOH solution at 280K and 759‌mm‌Hg. The percentage of nitrogen in the given organic compound is ____(Nearest integer)
Given :
(a) The vapour pressure of water of 280K is 14.2‌mm‌Hg.
(b) R=0.082L atm K−1mol−1