mC = 1.2 (g), mH = 0.3 (g)
=> mO = 2.3 - (1.2 + 0.3) = 0.8 (g) --> X có Oxi
CT: CxHyOz
Ta có: 12x/1.2 = y/0.3 = 16z/0.8 = 46/2.3
=> x = 2, y = 6, z = 1
CT: C2H6O ( C2H5OH )
C2H5OH + Na => C2H5ONa + 1/2 H2
nCO2= 0.1 (mol)
=> nC= 0.1 mol
=> mC= 1.2g
nH2O= 0.15 (mol)
=> nH= 0.3 mol
mO= 2.3 - 1.2 - 0.3=0.8g
nO= 0.05 mol
Gọi: CT của X: CxHyOz
x : y : z= 0.1 : 0.3 : 0.05= 2 : 6 : 1
(C2H6O)n= 46
<=> 46n=46
<=> n=1
Vậy: CTPT: C2H6O
CH3-O-CH3
CH3-CH2-OH
C2H5OH + Na --> C2H5ONa + 1/2H2