A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occu

Question

3 years ago

12

A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occu

rred during his experiment?
The powder catches on fire.
The powder releases bubbles.
The powder heats up.
The powder breaks apart into smaller particles.

Chemistry

1 answer:

n200080 [17] · Answer 1 · 2022-07-18T13:56:43+03:00

n200080 [17]3 years ago

7 0

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.