Here's how to calculate the grams in 4.5 moles of sodium:

1. Find the molar mass of sodium:

* The molar mass of sodium (Na) is approximately 22.99 g/mol. You can find this on the periodic table.

2. Use the formula:

* grams = moles * molar mass

3. Plug in the values:

* grams = 4.5 moles * 22.99 g/mol

4. Calculate:

* grams ≈ 103.46 g

Therefore, there are approximately 103.46 grams in 4.5 moles of sodium.