Solving Centibarrer Equation - Hg Value & Proper Values

[Idea04]

Homework Statement

I have an equation that tells you the number of cubic cm of gas permeable
through an item. But I'm not getting a proper answer.
what does Hg stand for and what is its value. does anyone know the proper values for this equation and how to solve.
the values I have are 1 square cm, .238125 cm thick, time is one second.
I think Hg is to be the partial pressure difference across the membrane.

Homework Equations

10^-8x(cm^2-cm)/cm-Hg-sec-cm^2

The Attempt at a Solution

 

[Kurdt]

I've never heard of the centibarrer equation before but cm Hg probably means centimeters of mercury which is a pressure. Hope that helps.