<span>CH3COH+2Cu(OH)2 => CH3COOH+2CuOH+H2O </span><span>2CuOH => Cu2O+H2O</span><span>m(CH5COH)=55г.*0,4=22г.</span><span>n(CH3COH)=22г./44г./моль.=0,5моль</span><span>n(CH3COOH)=0,5моль</span><span>m(CH3COOH)=0,5моль*60г./моль=30г.</span><span>Ответ: 30г</span>