Here's how to calculate the grams of sodium chloride (NaCl) in 4.80 moles:

1. Find the molar mass of NaCl:

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

* Chlorine (Cl) has a molar mass of 35.45 g/mol

* Molar mass of NaCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol

2. Use the conversion factor:

* 1 mole NaCl = 58.44 grams NaCl

3. Calculate the mass:

* 4.80 mol NaCl * (58.44 g NaCl / 1 mol NaCl) = 280.51 grams NaCl

Therefore, there are 280.51 grams in 4.80 moles of sodium chloride.