Posted by JULIE on Sunday, October 23, 2011 at 5:52pm.
A 260mL flask contains pure helium at a pressure of 743 torr. A second flask with a volume of 480 mL contains pure argon at a pressure of 715 torr.
If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of helium? in torr
If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of argon? in torr
If the two flasks are connected through a stopcock and the stopcock is opened, what is the total pressure? in torr

chemistry 105  bobpursley, Sunday, October 23, 2011 at 6:07pm
I assume they are both at the same temperature initially.
Parial pressure is dependent on mole ratio. n=PV/RT in each flask, find n for each first.
Then ADD the n for each. That is the N for the combined.
PV=NRT now solve for P for the combined gases.
Parg+Phelium= P
Parg=narg/N * P
Phelium= nhelium/N* P 
chemistry 105  banele, Friday, October 16, 2015 at 6:45am
752 torr of He
582 torr of Ar
total=1334 torr