3Zn + 4H2SO4 = 3ZnSO4 + S + 4H2O
Zn(0) -2e = Zn(+2) 3 ок-ие
в-ль
S(+6) +6e = S(0) 1 в-ие
ок-ль
C₆H₁₂O₆+Ag₂O=C₆H₁₂O₇+2Ag, 200-200×0,15=170
180 г. 216 г.
170 204
10/204≈0,05 или 5%
<span>С2H4 + Н2О = СH3COH</span>
<span><span>CH3COH + {O2} = CH3COOH</span></span>
<span><span><span>CH3COOH + C2H5OH = CH3COOC2H5 + H2O</span></span></span>
<span><span><span><span>CH3COOC2H5 + NaOH = CH3COONa + C2H5OH</span></span></span></span>
Ответ:
1-3;2-4;3-3;4-1 ...........