nCO2=0.896/22.4=0.04(mol)
nC=0.04 * 2=0.08(mol)
mC=0.08*12=0.96(g)
nN2=0.224/22.4=0.01(mol)
nN=0.01*2=0.02(mol)
mN=0.02*14=0.28(g)
nH2O=0.9/18=0.05(mol)
nH=0.05*2=0.1(mol)
mO=mA-(mC+mH+mN)=1.5-(0.96+0.28+0.1)=0.15(g)
nO=0.16/16=0.01(mol)
Gọi CTPT của A: CxHyOzNt
x : y : z : t =0.08 : 0.1 : 0.01 : 0.02 = 8 : 10 : 1 : 2
Vậy CTPT của A : C8H10ON2