Biology, 26.08.2019 20:30 rheamorrell

Which of the following correctly identifies steps used in the fractional distillation of petroleum?
the mixture is cooled, condenses, then heated and boils.
the mixture is cooled, boils, then heated and condenses.
the mixture is heated, condenses, then cooled and boils.
the mixture is heated, boils, then cooled and condenses.

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