How Do You Calculate Final Pressure in Connected Gas Containers?

[FahimP]

Homework Statement

Two containers contain the same gas at different temperatures and pressures, as indicated in the figure. The small container has a volume of 1 L, and the large container has a volume of 2 L. The two containers are then connected to each other using a thin tube, and the pressure and temperature in both containers are allowed to equalize. If the final temperature is 219 K, what is the pressure.

Givens :
P1 = 3 x10 ^ 5
P2 = 2 x 10 ^5
T1 = 600k
T2 = 200K

Homework Equations

P1V1/T1 = P2V2/T2

The Attempt at a Solution

I used this equation to find final pressure
P1V1/T1 = PfVf / Tf
i solved for Pf and I got like 7300. I know the answer has to be between the given pressures but I don't think I am using the right equation. I also used this equation which i made up P1V1/T1 + P2V2/T2 = PfVf/Tf ---> which didnt work any advice or tips

 

[tweety1234]

what units is the pressure given in?

 

[Borek]

What is total amount of gas after connecting the tanks? What is total volume?