n(H2O) = 10.8/18=0.6mol所以 n(H) = 1.2mol 由 C2H6O 得,n(C) = 0.4mol 即 n(CO)+n(CO2) = 0.4mol设n(CO) = xmol28x+44(0.4-x) = 27.6-10.8 = 16.8x = 0.05所以CO的质量为28*0.05 = 1.4g