Basically Emergence dictates that a group of things (like H2O molecules) can form something greater than the sum of itself (wetness). In the molecules wetness is not a thing, but the interaction of water with something else creates wetness. This concept cannot reasonably be boiled down to the molecular level, it only exists on this plane of existence.
My favourite answer to this is Emergence, which was explained well in a recent kurzgesagt video.
Basically Emergence dictates that a group of things (like H2O molecules) can form something greater than the sum of itself (wetness). In the molecules wetness is not a thing, but the interaction of water with something else creates wetness. This concept cannot reasonably be boiled down to the molecular level, it only exists on this plane of existence.