Study this chemical reaction: CuCl2(aq)+ Mg(s) → MgCl2(aq)+ Cu(s)

Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.

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 atomic mass is the bottom number on the element.

-steel jelly

the answer is c. nacl