You're asking about the percent sodium in sodium oxide (Na₂O). Here's how to calculate that:

1. Find the molar mass of sodium oxide (Na₂O):

* Sodium (Na) has a molar mass of approximately 22.99 g/mol.

* Oxygen (O) has a molar mass of approximately 16.00 g/mol.

* Na₂O has a molar mass of (2 * 22.99 g/mol) + (16.00 g/mol) = 61.98 g/mol

2. Find the mass of sodium in one mole of sodium oxide:

* One mole of Na₂O contains two moles of sodium.

* The mass of sodium in one mole of Na₂O is (2 * 22.99 g/mol) = 45.98 g/mol

3. Calculate the percent sodium:

* (mass of sodium / molar mass of Na₂O) * 100%

* (45.98 g/mol / 61.98 g/mol) * 100% = 74.19%

Therefore, the percent sodium in sodium oxide (Na₂O) is approximately 74.19%.