As a refresher, state Newton's 3 Laws of Motion

this is from my notes so sorry if its not exact :)

1st Law- an object at rest, stays at rest and an object in motion will stay in motion at a constant velocity, unless acted upon by an unbalanced force. (law of inertia)

2nd Law- force equals mass times acceleration (F=ma)

3rd Law- For every action, there is an equal and opposite reaction

Explanation:

these are more of the basic answers but hope that helps !

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e