Question

Which of the following is NOT a variable property for a gas?

A. mass

B. density

C. volume

D. shape

Answer 1

Mass

Explanation:Gases are matter, they have volume, their volume is variable. Gas can be compressed like in a bike tire, so it changes shape. As a substance changes from a solid to a liquid to a gas its density generally decreases. So gas has volume, shape and density.

Answer 2

Mass, air has that. Since what fills up a balloon? A gas
Shape, it has no definite shape. This one is accurate, it has no definite shape, it takes the shape of the object it's in.
Volume, does air take up space? If it does then yep. Balloon example/
Density, yes it does, because it's tightly wounded up.

D