Question

1. explain why liquids and gases differ in density and the ability to be compressed.

Explanation:

The difference in density and compressibility between liquids and gases is due to the arrangement and movement of their particles. In liquids, particles are close together with moderate intermolecular forces, so they have higher density and are not easily compressed. In gases, particles are far apart with weak intermolecular forces, so they have lower density and are highly compressible as there is much empty space between particles that can be reduced.

Answer:

Liquids have particles closely packed (moderate intermolecular forces) → higher density, less compressible. Gases have particles far apart (weak intermolecular forces) → lower density, highly compressible (empty space between particles can be reduced).