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Statistics Help

**Question: **Benzene, toluene, and xylene have different boiling points and, therefore, can be separated using distillation. A mixture containing 30.0 mass% benzene, 40.0 mass% toluene, and 30.0 mass% xylene is fed to a distillation tower. Two streams leave this distillation tower. The stream leaving the top of this first distillation tower (overhead-1) contains benzene, toluene and xylene. The stream leaving the bottom of the first distillation tower (bottoms-1) contains only toluene and xylene. The amount of toluene in bottoms-1 is 60% of the amount of toluene in overhead-1. The amount of xylene in bottoms-1 is 90.0% of the xylene in the feed to the first distillation tower. The overhead-1 stream then goes into a second distillation tower. Two streams leave this second distillation tower. The stream from the top of the second distillation tower (overhead-2) contains only benzene and toluene. The amount of toluene in overhead-2 is 40.0 % of the amount of toluene in the feed to the first distillation tower. The stream from the bottom of the second distillation tower (bottoms-2) contains only toluene and xylene. The bottoms-1 stream is fed to a third distillation tower. Two streams also leave this third distillation tower. The stream leaving the top of the third distillation tower (overhead-3) contains only toluene. In addition, the amount of toluene in overhead-3 is 80.0% of the toluene in the feed to the third distillation tower (bottoms-1). The overhead-3 stream is combined with the bottoms-2 stream to give one of the streams leaving this process. Two other streams leave this process – overhead-2 and bottoms-3. What are the compositions of the three streams leaving the process - overhead -2, bottoms-3 and the combined bottoms-2+overhead-3 stream? Edit

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