1. Convert mL to L:

* 500 mL = 0.5 L

2. Use the molarity formula:

* Molarity (M) = moles of solute / liters of solution

3. Rearrange the formula to solve for moles:

* moles of solute = Molarity * liters of solution

* moles of NaCl = 0.5 M * 0.5 L = 0.25 moles

4. Calculate the mass of NaCl:

* grams of NaCl = moles of NaCl * molecular weight of NaCl

* grams of NaCl = 0.25 moles * 58.5 g/mol = 14.625 g

Therefore, you would dissolve 14.625 grams of NaCl in water to make a 0.5 M solution with a final volume of 500 mL.