Complete the reaction equation: 1) PH (3) + O (2) → 2) CaC (2) + O (2) → 3) Al (2) S (3) + O (2) → 4) ZnS + O ( 2) → 5) NaH + O (2) →

1) 2PH3 + 4O2 → P2O5 + 3H2O
2) 2CaC2 + 5O2 → 2CaO + 4CO2
3) 2Al2S3 + 9O2 → 2Al2O3 + 6SO2
4) 2ZnS + 3O2 → 2ZnO + 2SO2
5) 2NaH + O2 → 2NaOH



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