Here's how to calculate the number of moles of sodium in 120 grams:

1. Find the molar mass of sodium:

* The molar mass of sodium (Na) is approximately 22.99 g/mol.

2. Use the formula:

* moles = mass / molar mass

3. Plug in the values:

* moles = 120 g / 22.99 g/mol

4. Calculate:

* moles ≈ 5.22 mol

Therefore, there are approximately 5.22 moles of sodium in 120 grams.