Question

)1(A glass ful milk is heavier compared to any glass. Why?​

Answer 1

Answer:

Room temperature milk is liquid, the component molecules drawn close together by attractive electrostatic interactions that prevent them from diffusing off.  Room temperature air is gaseous. The molecules diffuse away from one another freely because their kinetic energy is high enough to overwhelm any attractive interactions that might otherwise keep them together.  Gases are, in general, far, far, less dense than liquids. They are a state of matter in which the molecules in the system are past the point where they have enough energy to break off and run their own course.

Under normal conditions, the liquid milk has lots more molecules per glass than the uncompressed glass of air.

Answer 2

Answer:

Room temperature air is gaseous. The molecules diffuse away from one another freely because their kinetic energy is high enough to overwhelm any attractive interactions that might otherwise keep them together.