1. Balanced Chemical Equation:

The balanced chemical equation for the reaction of sodium (Na) with oxygen (O₂) to form sodium oxide (Na₂O) is:

4 Na + O₂ → 2 Na₂O

2. Mole Ratio:

The balanced equation tells us that 4 moles of sodium react with 1 mole of oxygen to produce 2 moles of sodium oxide.

3. Calculate Moles of Sodium Oxide:

Since you're starting with 10 moles of sodium, we can use the mole ratio to find the moles of sodium oxide produced:

* (10 moles Na) * (2 moles Na₂O / 4 moles Na) = 5 moles Na₂O

Therefore, 5 moles of sodium oxide will be produced when 10 moles of sodium react with oxygen.