Question

Leslie is observing the air in a balloon. She wants to know if the air in the balloon is matter. What must be true of the air for it to be matter?

Answer 1

it must be helium or carbon dioxide. I say co2

Answer 2

For usatestprep its D

Step-by-step explanation:

It must have mass and volume. The air in a balloon has mass. it can be observed by placing balloon on a balance before and after blowing it up. You can see the volume of the air in the balloon when it is blown up.