Which transition represents a time when water molecules are moving closer together?
a.
frost forms on a window pane.
b.
dew forms on the grass.
c.
a puddle disappears.
d.
sleet turns to rain.

A. Is very attractive. If it's sublimation directly from water vapor in the air to ice on the glass, then yes. But from liquid water mist to water ice, no. Ice is less dense than water. That's why cubes float in your soda. Better leave 'A' alone. . . . D. Ice pellets turn to liquid. That one's good.

What formula  this one  (x_/