<span>2NH3+2CrO3--->N2+Cr2O3+3H2O</span>
1. 2FeCl3+3Ba(OH)2=2Fe(OH)3+3BaCl22. H3PO4+3KOH=K3PO4+3H2O3. MgO+H2SO4=MgSO4+H2O