C : 41,096 : 12 = 3,424 | : 1,369 = 2,5 | x 2 = 5
H : 6,849 : 1 = 6,849 | : 1,369 = 5 | x 2 = 10
O : 32,876 :16 = 2,054 | : 1,369 = 1,5 | x2 = 3
N : 19,178 : 14 = 1,369 | : 1,369 = 1 | x2 = 2
(C5H10O3N2)n (5+10+3+2)n = 20 n = 1 C5H10O3N2
b) NE = (2·5 + 2 - 10 + 2)/2 = 2 ⇒ nr. max. covalente π = 2