100cc vol of gas leaks at a rate of 8.81*10^-5stdcc/s initial pressure 800torr.pressure after thirty days is?

Answer 1

What is the temp ??? Assuming the temp is constant, set up a first order eqn. w.r.t to the number of moles left after a time t. Then relate it with pressure.

By the way, is this from the student competition from ISRO ???