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4Fe+3O₂ = 2Fe₂O₃
2K+Cl₂ = 2KCl
N₂+3H₂ = 2NH₃
2H₂+O₂ = 2H₂O
CuO+H₂ = Cu+H₂O
CH₄+2O₂ = CO₂+2H₂O
Mg(OH)₂+2HCl = MgCl₂+2H₂O
2Mg+O₂ = 2MgO
Ca+Cl₂ = CaCl₂
2HgO = O₂+2Hg
C+2H₂ = CH₄
2Na+2HCl = 2NaCl+H₂
4NH₃+3O₂ = 2N₂+ 6H₂O
2ZnS+3O₂ = 2ZnO+2SO₂
a) 2Ca+O₂ → 2CaO
b) Cl₂+2Na → 2NaCl
c) 3S+2Al → Al₂S₃
d) Mg+H₂O → MgO+H₂
e) 2K+S → K₂S
f) 2Ag₂O → O₂+4Ag
g) 3H₂+Fe₂O₃ → 2Fe+3H₂O
h) 2PbO → 2Pb+O₂
i) CaCl₂ → Ca+Cl₂
j) CuO+H₂ → H₂O+Cu