CH3-CH2-CH2-CH2-NH2 = 1-butanamina (1-butilamina)
CH3-CH(NH2)-CH2-CH3 = 2-butanamina (sec-butilamina)
CH3-C(CH3)(NH2)-CH3 = 2-metil-2-propanamina
compozitie
Fm = C4H11N => M.molec. = 4x12+1x11+1x14 = 73 g/mol
=> 73 g ..... 48 g C ..... 11 g H ..... 14 g N
la 100% (g) ...... a% C......... b% H ...... c% N
=> a = 48x100/73 = 65,75% C
b = 11x100/73 = 15,07% H
c = 14x100/73 = 19,18% N
