College chemistry Question

Question

  How many moles of gas does it take to occupy 120 liters at a pressure of

2.3 atmospheres and a temperature of 340 K?

How do i work out this problem?

Answer 1

Assuming this is an ideal gas, we will use the ideal gas equation PV=nRT, Pressure*Volume=number of moles*Gas constant*Temperature.

You have the following

P=2.3 atm

V=120 L

T=340 K

R=0.0821 L atm/mol K

Plug, these numbers into the equation and solve for n, the number of moles.