Question

How many kilograms of chlorine are in 30kg of each of the following chlorofluorocarbons (CFC's)?

CF2Cl2 -in kg's;

CFCl3 -in kg's;

C2F3Cl3 -in kg's?

Answer 1

I will be happy to critique your thinking.

Answer 2

ok...so I took 30,000g * 1/120.913g/mol = 248.1122g. Then I went: 248.1122g * 70.906g/mol & got: 17592g = 18kg. Does this look correct? should I carry it through to the rest?

Answer 3

I obtained 17.592 kg chlorine which rounds to 18 kg to two significant figures. Note: You need not convert 30 kg to grams and convert back.
30 kg x (2 mols Cl/1 mol CF2Cl2) = 30 x (70.905/120.913) = 17.592 kg chlorine, then round to 18 kg. The others are done the same way.

Answer 4

thank you.