Define Molecular Range and Sphere of Influence - QS Study
QS Study

Molecular range is the maximum distance upto which a molecule can exert force of attraction on another molecule. It is of the order of 10-9 m for solids and liquids.

Sphere of influence is a sphere drawn around a particular molecule as centre and molecular range as radius. The central molecule exerts a force of attraction on all the molecules lying within the sphere of influence.