\(C_3H_6 + H_2O \xrightarrow{t^o} CH_3-CH_2-CH_2OH\\ C_3H_6 + H_2O \xrightarrow{t^o} CH_3-CH(OH)-CH_3\\ CH_3-CH_2-CH_2-OH + CuO \xrightarrow{t^o} CH_3-CH_2-CHO + Cu + H_2O\\ CH_3-CH(OH)-CH_3 + CuO \xrightarrow{t^o} CH_3-CO-CH_3 + Cu + H_2O\\ CH_3-CH_2-CHO + Ag_2O \xrightarrow{NH_3} 2Ag + CH_3-CH_2-COOH\)
n Ag = 4,32/108 = 0,04(mol)
Theo PTHH :
n CH3CH2CHO = 1/2 n Ag = 0,02(mol)
n C3H6 = 2,24/22,4 = 0,1(mol)
=> n CH3COCH3 = 0,1 - 0,02 = 0,08(mol)
%m CH3CH2CHO = 0,02.58/(0,05.58 + 0,08.58) .100% = 20%