V(H2S)=m:M= 340:64=5.3 моль
1)2H2O+2K=2KOH+H2.
2)3H2O+P2O5=2H3PO4.
3)2H2O+Ba=Ba(OH)2+H2
<span>2FeCl3 + 3Zn = 2Fe + 3ZnCl<span>2
</span></span><span>6Li + 2H3PO4 = 2Li3PO4 + 3H2
</span><span>2FeCl3 + 3Mg = 2Fe + 3MgCl<span>2
</span></span><span>3Fe + 4H2O = Fe3O4 + 4H<span>2
</span></span><span>2Al(OH)3 = Al2O3 + 3H2O</span>