a) C : 8 :12 = 0,66 x3 = 2
H : 1 : 1 = 1 x3 = 3 formula bruta C2H3
M = 1,9285 x28 = 54 g/mol (2·12 + 3·1)n = 54 n = 2
formula moleculara = C4 H6
b) C : 2,8/12 = 0,4 x 10 = 4
H : 1 / 1 = 1 x 10 = 10
O : 1,6 /16 = 0,1 x10 = 1 formula bruta : C4H10O
M = 2,56·28,9 = 74
(4·12 + 10·1 + 1·16)n = 74 n = 1 formula moleculara : C4H10O
c) C : 24/12 = 2 | : 0,5 = 4
H : 5/1 = 5 | :0,5 = 10
O : 8/16 = 0,5 | :0,5 = 1 formula bruta : C4H10O
m/M = V/Vm M = 22,4·3,7/1,12 = 74g/mol n = 1 F.M : C4H10O