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Hector uses the apparatus below to separate a mixture. How do the substances compare? Substance 1 has a lower density than Substance 2. Substance 1 has a higher density than Substance 2. Substance 1 has a lower boiling point than Substance 2. Substance 1 has a higher boiling point than Substance 2.

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Explanation:

Separation is a physical change, which uses the density of different substances to separate.

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