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

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

2. Calculate the mass of half a mole:

* Half a mole is 0.5 mol

* Mass = (0.5 mol) * (58.44 g/mol) = 29.22 grams

Therefore, there are 29.22 grams in half a mole of NaCl.