Find the steady state molar flow rate of HCl, in mol/s, through the plastic wall of a spherical container at 25°C with an HCl solution inside and outside the container. The container has an outer diameter of 60 mm and a wall thickness of 20 mm. Assume the HCl concentration in the wall at r = 10 mm is maintained at 1.0 X 10-5 M and the HCl concentration in the wall at r = 30 mm is maintained at 1.0 X 10-6 M. The ionic diffusion coefficients in the membrane at 25°C are 9.31 X 10-3 mm2/s for H+ and 2.03 X 10-3 mm2/s for Cl−. Assume there is no current in this problem.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.

two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.