Na2CO3 + H2SO4 - > Na2SO4 + CO2 + H2O Na2SO4 + Ba(OH)2 -> BaSO4 + 2NaOH NaOH + HCl -> H2O + NaClHNO3 + NH3 -> NH4NO3 NH4NO3 + KOH -> KNO3 + NH3 + H2ONH3 + HCl -> NH4Cl
4Na + O₂ = 2Na₂O
2Na + CI₂ = 2NaCI
6Na + N₂ = 2Na₃N
2Na + S = Na₂S
2Na + H₂ = 2NaH
2Zn + O₂ = 2ZnO
Zn+ CI₂ = ZnCI₂
3Zn + N₂ = Zn₃N₂
Zn + S = ZnS
Zn + H₂ = ZnH₂