VITEEE 2015 Paper

M.wt. of caffeine = 194 u
% of N present in one molecular of caffeine is 28.9% of
194 u =

28.9

100

× 194 = 56 u
Mass of one N atom = 14 m
= 1 N atom (Since 14 m = 14 u)
∴ 56u =

56

14

N atom = 4 N atom