In order to find the molar mass, you just need to add up the mass from the periodic table and add them up together
carbon- 12.01 (6) = 72.06 g
hydrogen- 1.008 (12) = 12.096 g
chlorine- 35.45 (2) = 70.90 g
oxgyen- 16.00 (2) = 32.00 g
72.06 + 12.096 + 70.90 + 32.00 = 187.056 g/mol
hope this helps!