2. Which of the following is NOT true about waves?
a. They carry energy.
b. They transfer matter.
c. They can be longitudinal.
d. They require a medium.

b.) they transfer matter.

Explanation:

Although waves carry energy, they do not carry matter.

You will notice that a wave in the water will move, but an object in the water will not move with it. This is because a wave does NOT transfer matter with it.

I hope this helps :)

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).