Question

9) How do you know a chemical change has occurred?

a. New bonds have formed or bonds have broken.
b. The matter has had a change in state.
c. The temperature has changed.
d. All of the above
e. Only a and c are indicators of a chemical change.

please help!!!!! 15 pts

10) If a chemical bond is formed or destroyed, what changes?
a. Energy is absorbed or released.
b. Protons are absorbed.
c. Neutrons will vary.
d. Energy is destroyed.
e. Protons are released.

Answer 1

9)=A These two are indications of a chemical change. (I am positive it is A)
10)=A It is not D and the others don't seem as right so I hope this helps.