To calculate the molar mass of sodium chloride NaCl , we need to find the molar mass of each element sodium and chlorine and then add them together. Step 1: Find the molar mass of sodium Na The molar mass of sodium can be found on the periodic table. Sodium has an atomic mass of approximately 22.99 g/mol.Step 2: Find the molar mass of chlorine Cl The molar mass of chlorine can also be found on the periodic table. Chlorine has an atomic mass of approximately 35.45 g/mol.Step 3: Add the molar masses of sodium and chlorine togetherMolar mass of NaCl = molar mass of Na + molar mass of Cl Molar mass of NaCl = 22.99 g/mol + 35.45 g/molMolar mass of NaCl = 58.44 g/molSo, the molar mass of sodium chloride NaCl is approximately 58.44 g/mol.