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Simon has collected three samples from the coral reef where he observes marine life. He must determine whether
each one is a pure substance or a mixture.
Appearance
When heated
Sample A
Sample B
Sample C
Sample A is a
Clear liquid
Clear, blue
liquid
Opaque, whitish
liquid
Evaporates completely at
70°C
Boils at 90°C, leaving blue
crystals behind
Boils at 100°C, leaving
white crystals behind
Sample B is a
When left over time
Appearance does not change
Appearance does not change
Dust appears to settle to the
bottom
and Sample C is a
Dona

Sagot :

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