Answer :

Mass of CCl2F2 = moles x molar mass of CCl2F2 
                           =  0.5 x 120.913 
                           =    60.4565 grams.

Hope this helps!

Answer : The mass of 0.500 mole of dichlorodifluoromethane are, 60.455 grams

Explanation : Given,

Moles of [tex]CCl_2F_2[/tex] = 0.500 moles

Molar mass of [tex]CCl_2F_2[/tex] = 120.91 g/mole

Formula used :

[tex]\text{Mass of }CCl_2F_2=\text{Moles of }CCl_2F_2\times \text{Molar mass of }CCl_2F_2[/tex]

Now put all the given values in this formula, we get the mass of dichlorodifluoromethane.

[tex]\text{Mass of }CCl_2F_2=0.500mole\times 120.91g/mole[/tex]

[tex]\text{Mass of }CCl_2F_2=60.455g[/tex]

Therefore, the mass of 0.500 mole of dichlorodifluoromethane are, 60.455 grams