# Physics problem I don't understand?

a sealed cubicle container 20.0 cm on a side contains three times avogadro's number of molecules at a temperature of 20.0 degrees C. Find the forces exerted by the gas on one of the walls of the container

*please help! I was looking at this problem in my physics book and it has me stumped. I have a test coming up too. Thanks!

### 2 Answers

- 1 decade agoBest Answer
So first you have to find the internal pressure. Use the ideal gas law

PV=nRT or one of the variants.

You know the volume V=s^3.

You know n, 2x Avagoardos's number

you know R - its a constant

you know T - 20 C

You can solve for P

Then F=PA (force = pressure times area_

Area = side ^2

So you can solve for force.

- mickoLv 43 years ago
your terminology is undesirable. After slightly concept, I guessed that m's^2 is truthfully m/s^2 or m/s² n is Newtons? T is time? i do no longer prefer to circulate any added till finally you sparkling up the terminology and define the words. .