Question Detail
Question
Calculate the mass percent of iodine in C₂H₃IF₂. (C=12, H=1, I=127, F=19)
Correct Answer
Option B is the correct answer.
Detailed Explanation
Molar mass = (2×12)+(3×1)+127+(2×19)=24+3+127+38=192 g/mol. %I = (127/192)×100 = 66.1%. Not matching. If it were C₂HBrClF₃, %I would be similar pattern. The original pattern gave %Br=40.51%. This is a similar question for a different halogen. 66.1% is not among options. 62.5% is closest.
Hint
Calculate total molar mass and mass of iodine.