During science lab, some students added small pieces of magnesium ribbon to 10 mL of hydrochloric acid. They noticed that bubble

Question

3 years ago

11

During science lab, some students added small pieces of magnesium ribbon to 10 mL of hydrochloric acid. They noticed that bubble

s formed, the test tube got hot, and the magnesium disappeared.
Which is a sign that a chemical reaction has taken place in this experiment?

Chemistry

2 answers:

stiv31 [10] · Answer 1 · 2022-01-31T00:21:16+03:00

stiv31 [10]3 years ago

4 0

Your answer would be a change in odor! Hope this helps! ;D

Stels [109] · Answer 2 · 2022-01-31T02:25:03+03:00

Stels [109]3 years ago

4 0

Answer:

C

Explanation:

Release of heat energy

The test tube got hot; that's a sign that heat energy is being released. This is an exothermic chemical reaction. Change in odor and color are signs of a chemical change but do not occur in this case.

(Correct in USA Test Prep too!)