Question

Na → NaOH → NaHCO3 → CO2 ↓ Na2O​

Answer 1

2Na+2H2O=2NaOH+H2

Объяснение:

........

Answer 2

It seems like you've provided a series of chemical reactions:

1. Na → Sodium (elemental form)
2. NaOH → Sodium Hydroxide
3. NaHCO3 → Sodium Bicarbonate (Baking Soda)
4. CO2 ↓ Carbon Dioxide (produced as a gas)
5. Na2O → Sodium Oxide

If you have a specific question or topic you'd like to discuss about these reactions, please let me know!