A si B CxH(2x+2)O %O = 16·100/MA
C siD : CxH2xO %O = 16·100/MC
1600/MC · MA/1600 = 1,034
(14x+18)/(14x+16) = 1034/1000
(7x+9)/(7x+8) = 517/500
1/(7x+8) = 17/500 119x + 136 = 500 x = 3
A = 1propanol; B = etil-metil eter ; C = propanal ; D = propanona