2KOH+N2O5=>2KNO3+H2O
HCOOH+KOH=>HCOOK+H2O
ZnSO4+2KOH=K2SO4+Zn(OH)2
Zn2+ +2OH - =>Zn(OH)2
N2+3H2=2NH3
n(N2)=56/22.4=2.5моль
V(NH3)=5*22.4=112л
V(NH3)=112*0.5=56л