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6. Fractional distillation is a...
- thermal decomposition reaction
- physical change
- chemical reaction
- good way to separate things
7. During fractional distillation...
- hydrocarbons are chemically separated into smaller hydrocarbons
- substances with high boiling points condense at the bottom and substances with lower boiling points condense at the top
- crude oil stays as crude oil
- substances with low boiling points condense at the bottom and substances with high boiling points condense at the top