Answer
7%
Work Step by Step
We have 0.035 moles I2 in 125g CCl4. First we need to find the grams of I2. The molar mass of Iodine is 127 g/mol so I2 would be 254 g/mol.
0.035 moles * (254g/ 1mol) = 8.89 grams
Then we have (8.89/127) * 100% = 7%