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Biology, 26.09.2019 02:00 monstergirl25

Which is a clue that a chemical change has occured?
a. a beaker suddenly becomes very warm when you mix two room-temperature liquids in it.
b. a liquid forms bubbles when it reaches a high temperature.
c. water changes color when you add food coloring to it.
d. a car door feels hot if you touch it on a summer afternoon.

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Which is a clue that a chemical change has occured?
a. a beaker suddenly becomes very warm wh...

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