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9. Density differences only work if substances are insoluble, (so petroleum doesn't work).
10. Water and Acetone because they have the largest difference.
11. (on paper)
12.(on paper)
13. Fractional distillation is different because it is the process of separating mixtures into its components by boiling and condensing its components.
14. 1. Gas oil 2. Grease 3. Jelly
15. I expect it to be the bottom because they are more difficult to separate and this requires thermal energy to vaporize.
16. You could separate them by the most differing boiling points!
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