jmisha16 jmisha16

08-02-2017
Physics

contestada

A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment? The powder catches on fire.

The powder releases bubbles.

The powder heats up.

The powder breaks apart into smaller particles.

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tinabmth tinabmth

08-02-2017

B. is the correct answer :)

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