1. Find the molar mass of CCl2F2
* Carbon (C): 12.01 g/mol
* Chlorine (Cl): 35.45 g/mol (x2 since there are two chlorine atoms)
* Fluorine (F): 19.00 g/mol (x2 since there are two fluorine atoms)
Molar mass of CCl2F2 = 12.01 + (35.45 x 2) + (19.00 x 2) = 120.91 g/mol
2. Use the molar mass and the given moles to find the mass
* Mass = Moles x Molar Mass
* Mass = 0.500 mol x 120.91 g/mol
* Mass = 60.46 g
Therefore, the mass of 0.500 mol of dichlorodifluoromethane (CCl2F2) is 60.46 g.
