<span>NiSO4 + 2NaOH = Ni(OH)2↓ + Na2SO4- М.И.У</span>
<span>Ni[2+] + SO4[2-] + 2Na[+] + 2OH[-] = Ni(OH)2↓ + 2Na[+] + SO4[2-]- П.И.У</span>
<span>Ni[2+] + 2OH[-] = Ni(OH)2↓ - С.И.У</span>
Zn + H2S = ZnS + H2
39/65 = x/22.4;
x = (39*22.4)/65 = 13.44 л
CH4 + Cl2 (hv)= CH3Cl + HCl
//////////////
........////