As I stated in my second paragraph. Molecules are bouncing around at random and some will find their way into the one way mechanism.
No they're not bouncing around at random, at all.
They are under pressure and are expanding and compressing against each other, more or less so in areas of more energy force.
This can take the form of two rotating shapes that will push molecules out in one direction while not allowing them back in.
I'm not too sure what you mean here.
Nothing happens to the descreasing molecules in the chamber. There as just less of them.
less of them, yes but there's a reason why there's less and it's because they are more expanded in taking up the same space.
The fewer molecules in the chamber the fewer impacts on the chamber wall and therefore less pressure.
The impacts are through touching the walls of the chamber not by randomly bouncing into them.
The molecules are very small and dense before evacuation. As soon as external dense molecules are pushed away externally by the pump pushing them back, the molecules in the chamber can decompress by natural expansion from their compressed state.
The more powerful push the pump has, the more molecules can expand out of the chamber to be compressed externally into the already compressed external atmosphere.
The chamber can never be empty of molecules. It is always full no matter how strong the pump is. The only difference is in how expanded the molecules inside, are and how much expansion they have left in order to get to a point where their push on push expansion creates no more external push out of them.
Try and absorb what's being said. I'm almost certain you won't because you're in no way in all hell going to bother to understand the reality against the fiction you're schooled into.
Eventually there are so few molecules that the pressure will be negligible and you will have a vacuum.
Just rattling around in the chamber, eh?
Read above and you could literally start to think for yourself.
Maybe some genuine people will grasp it. You never know.