polipeptid : H2N-CH(CH3)-CO-[-NH-CH(CH3-CO-]n-NH-CH(CH3)-COOH
initial : (n+2) moli C3H7NO2 M = 89g/mol md = 89(n+2) ⇒ ms = 890(n+2)
final : mdf = 89(n+2) - 18(n+1) = 89n + 178 - 18n -18 = 71n + 160
c = 8,18% ms = 890(n+2)
(71n+ 160)·100/[890(n+2)] = 8,18
7100n + 16000 = 7280,2n + 14560,4
180,2n = 1439,6 n = 8 n+2 = 10
polipeptid = nonaalanil-alanina