Răspuns:
1)a.C:H:O=18:3:8 x 2...=36:6:16
Ar(c)=12, 36:12=3(atomi de carbon)
Ar(h)=1, 6:1=6(atomi de hidrogen)
Ar(O)=16, 16:16=1(1 atom de oxigen)
formula : C3H6O
b)C:H:N=18:5:14 x 2=36:10:28
(inmultim pentru a avea in raport masa completya a ele,mentului chimic)
formula :C2H10N2
c) C:H=6:1 x2=12:2
formula CH2
