1. Find the molar mass of NaCl:
* Sodium (Na) has a molar mass of approximately 22.99 g/mol.
* Chlorine (Cl) has a molar mass of approximately 35.45 g/mol.
* The molar mass of NaCl is 22.99 g/mol + 35.45 g/mol = 58.44 g/mol
2. Use the formula:
* moles = mass / molar mass
3. Plug in the values:
* moles = 20.0 g / 58.44 g/mol
* moles ≈ 0.342 mol
Therefore, there are approximately 0.342 moles in 20.0 grams of NaCl.
