Question

how would adding molecules to a container affect the air pressure in the container?
a more molecules per unit area means less air pressure.
b it would increase the total amount of molecules striking the boundary of the container.
c adding molecules would actually not have an affect on air pressure.
d more molecules equals less collisions in the container.

Explanation:

Air pressure is caused by the collision of gas molecules with the container walls. Adding more molecules increases the number of molecules striking the container boundary.

Answer:

B. It would increase the total amount of molecules striking the boundary of the container