1)5C6H5-CH3+6KMnO4+9H2SO4=5C6H5-COOH+6MnSO4+3K2SO4+14H2O
2)10C6H5-C2H5+14KMnO4+21H2SO4=
10C6H5-COOH+10CO2+14MnSO4+7K2SO4+16H2O
V(CO2)=2,24л; n(CO2)=0,1моль; n(C6H5-COOH)=0,1моль; m(C6H5-COOH)=0,1*122=12,2;
V(C6H5-C2H5)= 2,24л;
m(C6H5-COOH)=36,6-12,2=24,4г ; n(C6H5-COOH)=24,4:122=0,2моль;
n(C6H5-CH3)=0,2моль; V(C6H5-CH3)=0,2*22,4=4,48л;
Ответ: С6H5-C2H5 =2,24л
C6H5-CH3=4,48л.