<span>ZnSO4 + 2NaOH = Zn(OH)2 + Na2SO4</span>
<span><span>Zn(OH)2 = ZnO + H2O</span></span>
<span><span>ZnO<span> + HCl = ZnCl2+ H2O</span></span></span>
CuSO4 + 2 NaOH => Cu(OH)2 + Na2SO4
n (Cu(OH)2) = n (CuSO4) = 16 г /160 г/моль = 0,1 моль
m (Cu(OH)2) = 0,1 моль*98 г/моль = 9,8 г.
C2H4+H2=C2H6
n C2H4=5/22.4=0.223 моль
n H2=0.223 моль
V H2=0.223*22.4=5 л