Final answer:
The molecular mass of NaCl is 58.44 g/mol.
Step-by-step explanation:
The formula mass of NaCl is calculated by adding the atomic masses of one sodium atom and one chlorine atom. Sodium (Na) has an atomic mass of 22.99 g/mol, and chlorine (Cl) has an atomic mass of 35.45 g/mol. Therefore, the molecular mass of NaCl is 22.99 + 35.45 = 58.44 g/mol.