Sound waves disturb or move air that has mass. How does something without mass move something that has mass?

Answer by  ThePractisedPhysicist (23)

Radiation pressure is the force exerted upon a surface exposed to electromagnetic radiation. Photons, which posses no mass, reflect off this surface causing an exchange of kinetic energy and momentum. This exchange imparts movement to the surface in order to conserve energy and conserve momentum.

Answer by  anon9374 (5)

Sound is a wave of pressure. Each region of air is getting pushed back and forth by the air around it.