Well it is kind of hard when youre not speaking same language...
You havent even addressed the volume issue.
Try me.
Im here for a discussion.
If i was to make fun i would do it outright.
Theres no magic in pumping air out of a pressure vessel.
Air molecules are free to bounce around the container.
Theres a one way valve.
Using a pump the molecules are sucked out.
Air cant go back in because of one way valve.
Tell me how air is "sucked" out.
Have a think about this.
You have what appears to be an empty glass container that is open. You know that the container is full of the same stuff outside of it, as in atmosphere.
You place a stopper in the container and now you have a separation of the atmosphere with a pressure inside that is basically trapped as well as all the rest of the atmosphere around the outside of it.
The pressure is basically equalised.
Ok, now here's where the suck part needs thinking about.
You need to get the atmosphere out of that glass container and by your thinking, you suck. But how do you suck from it?
It's easy to say "a pump" but a pump does not suck. You could say " use a bicycle pump" and press the handle right down then draw it back up and supposedly suck out the atmosphere from the jar through some kind of valve that closes as you supposedly suck.
But are you sucking anything out?
The answer is,
absolutely not.
It just requires thought.
Think very carefully on what I'm about to say.
If you were to place a bicycle pump onto the container and drew back the handle you would be expelling the atmosphere that is already inside the bicycle pump tube and creating a low pressure as you draw it back, even in the minutest movement.
This is where the molecules of the trapped atmosphere inside the container can start to expand out of their general compressed normal atmospheric pressure mode. They will expand to fill in that lower pressure you created in that tube.
You are doing absolutely nothing to the container itself in sucking anything out. It's happening naturally in expansion.
Now here's the key.
Once you keep drawing the pump, there will become a point where the molecules have expanded to a max inside that container.
The container will still be full of atmosphere, only that atmosphere will now be much less molecules and also more expanded.
The thing is they cannot expand anymore into the tube because the low pressure created in that tube is now also equalised and there nothing can expand into it.
End result? You simply have a low pressure container that is far from a vacuum but of sufficient low pressure as to be unable to agitate by expansion, leaving what we basically measure as a so called Vacuum.
Seriously think about this because it will massively help you and anyone else into solving a lot of stuff that we've been schooled into.
But "basics and basics".
You claim a lot.
Go read danangs posts.
Very similar way of talking.
If he wants to join in then he's welcome, as is anyone. But do it for the right reasons.