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Today at 7:27 AM
Chemistry

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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.

Answer :

Today at 7:32 AM

The powder catches fire. The rest of the choices pertains to physical changes on the powder. When the powder catches fire a chemical change happens. For example, if the powder is organic, carbon dioxide and water will result during the combustion.

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Today at 7:33 AM

Answer:

➢ⅇ powder catches on fire

....….that would be your answer

Explanation:

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