I am not sure how to even set this question up.

Question

I need to find out how many moles of C2 gas is contained in a 2.0L container that has a pressure of 125 atmoshpers and a temp of 10 C.

I have
P1-125 Atom
V1-2.0L
T1-10 C + 273 = 283K
N1 ?

I'm not sure where to go from here, my book is no help.

Answer 1

PV = nRT
P = 125 atm
V = 2.0 L
R = 0.08206 L*atm/mol*K
T = 283K.
Solve for n = number of moles.