Answer:
2H2O + O2 -- 2H2O
FeCl3 + 3NaOH -- Fe(OH)3 + 3NaCl
4P + 5O2 -- 2P2O5
2Na + 2H2O -- 2NaOH +H2
2Ag2O -- 4Ag + O2
K + MgBr -- KBr + Mg
Step-by-step explanation:
the moles of each element should be the same in both reactant reaction and product reaction