Question: Thank you for your help! I have the answer key but I am not sure what I am doing wrong so please show your work

Thank you for your help! I have the answer key but I am not sure what I am doing wrong so please show your work and I will gladly upvote if it is correct!

2. An airstream at 1 atm and 160 F contains 40,000 ppm toluene from an industrial solvent process. To recycle the material and to prevent worker exposure inside the plant, it is proposed to condense the toluene. To what temperature should the air be cooled to remove/recycle two-thirds of the vapor? (20%)

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