If 500 mol of hydrogen gas occupies 5.00L at 25 celsius, what is the pressure in atm?

I believe this is Ideal gas law. I can't figure out how to put it in the PV=nRT.

1 answer

P = ?
V = 5.00 L
n = 500
R = 0.08205
T = 25+273 = 298
Substitute and solve.
I'm not sure I understand what your problem is.