Вот ещё.............. .....
<span>2Zn + O2->2ZnO </span><span>ZnO+H2 --->Zn+H2O </span><span>Zn +2HCl->ZnCl2+ H2 </span><span>ZnCl2 + 2NaOH->Zn(OH)2 </span>