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20 November, 16:47

Scientists are studying how substance A and substance B react. When substance A and B are mixed, a substance different from A and B floats to the top of the solution. This is evidence that a (n).

physical change occurred.

endothermic change occurred.

irreversible change occurred.

chemical change occurred.

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  1. 20 November, 17:15
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    Endoyhermic change occurred
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