yes
yes because different gases have different mass and they will exert more of less pressure according to their mass
Yes.
Vapor materials exert their pressure in just about every direction
By distributing the weight over a smaller area.
athmospheric pressure
external pressure is pressure that other things exert on you
idek
yes
Pressure exerted
Your mass is how much matter you are made up of. Your weight is how much force you exert on your surroundings. If the force of gravity is greater or weaker, then your constant mass will exert more, or less force on the surroundings, ie, your weight will be different.
The fluids in your body exert pressure and prevent the atmospheric pressure from closing in. Fluids exert pressure on a container the particles collide with each other and the sides of the container.
All of the forces exerted by the individual particles in a fluid combine to make up the pressure exerted by the fluid.