n(C2H5OH)=4.6g/46g/mol=0.1mol
M(B)=7.4g/0.1mol=74g/mol
初步确定B是饱和一元酸,CnH2nO2
74=14n+32
n=3
A是醛, C3H6O ,
1molC3H6O 消耗氧气4mol ,符合题意.
所以
A: CH3CH2CHO,B:CH3CH2COOH C:CH3CH2COOC2H5
n(C2H5OH)=4.6g/46g/mol=0.1mol
M(B)=7.4g/0.1mol=74g/mol
初步确定B是饱和一元酸,CnH2nO2
74=14n+32
n=3
A是醛, C3H6O ,
1molC3H6O 消耗氧气4mol ,符合题意.
所以
A: CH3CH2CHO,B:CH3CH2COOH C:CH3CH2COOC2H5