Why can gas molecules be easily compressed?

Gas molecules can be easily compressed because they are far apart from each other. In a gas, the molecules have a lot of empty space between them compared to liquids and solids. This arrangement means that when pressure is applied, the molecules can be pushed closer together, resulting in a smaller volume.

The low density of gases, which is a consequence of the wide spacing between molecules, allows them to be compressed easily. In contrast, in liquids and solids, the molecules are much more closely packed and have limited ability to move closer together, making them less compressible.