Ответ:
• Na + H₂O: 2Na + 2H₂O → 2NaOH + H₂
• Ае + O₂: 2Al + 3O₂ → 2Al₂O₃
• Fe + O₂: 4Fe + 3O₂ → 2Fe₂O₃
• Са + O₂: 2Ca + O₂ → 2CaO
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Ответ:
• Na + H₂O: 2Na + 2H₂O → 2NaOH + H₂
• Ае + O₂: 2Al + 3O₂ → 2Al₂O₃
• Fe + O₂: 4Fe + 3O₂ → 2Fe₂O₃
• Са + O₂: 2Ca + O₂ → 2CaO