facem proba procentelor
37 + 2,2 + 18,5 + 42,3 = 100
=> C = 37/12 = 3,083
H = 2,2/1 = 2,2
N = 18,5/14 = 1,32
O = 42,3/16 = 2,64
impartim la cel mai mic multiplu comun =>
C = 37/12 = 3,083/1,32 = 2,333
H = 2,2/1 = 2,2/1.32 = 1,667
N = 18,5/14 = 1,32/1,32 = 1
O = 42,3/16 = 2,64/1,32 = 2
=> Fb. = C2.33H1.667N1O2
Fm = (C2.33H1.667N1O2)n , dam valori lui n pana obtinem indici intregi
=> n = C7H5N3O6