<span>C2H5OH + CuO = CH3COH + Cu + H2O</span>
<span><span>CH3COH + Ag2O =CH3COOH + 2Ag</span></span>
<span><span><span>CH3COOH +C2H5OH = CH3COOC2H5 + H2O</span></span></span>
<span><span><span><span>3C2H2 = C6H6</span></span></span></span>
<span><span><span><span><span>C6H6 + Br2 = C6H5Br + HBr</span></span></span></span></span>
<span><span><span><span><span><span>C6H5Br + KOH = C6H5OH + KBr</span></span></span></span></span></span>
Основный+2=амфотерный +3+4+=кислотный +6
2Mg+O2=2MgO
n(Mg)= m/M= 6/24=0,25моль
n(Mg)=n(MgO)=0,25 моль
m(MgO)=M*n=40*0,25=10 г
Ответ: 0,25 моль, 10 г
Сумма - 6
Уравнение
CH4+2O2=CO2+2H2O