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2. Balance these chemical equations.
(a) SO₂ + O₂SO3
(b) NH3 + O₂N₂ + H₂O
(c) C4H10+ O₂ CO₂ + H₂O
(d) Pb(NO3)2 →PbO + NO₂ + O₂
(e) Al + Fe3O4 →→→ Al₂O3 + Fe
(f) Sr + H₂O-Sr(OH)₂ + H₂

2 Balance these chemical equations a SO OSO3 b NH3 ON HO c C4H10 O CO HO d PbNO32 PbO NO O e Al Fe3O4 AlO3 Fe f Sr HOSrOH H class=

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