What happens after a chemical reaction? A: Atoms turn into a unit of matter.

B: Atoms are made for the first time.

C: Bonds between atoms break apart.

D: Bonds between atoms stay the same.

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

the product of the pressure and volume is also constant

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