Using the information given in Problem 11 and the equations of kinetic theory, calculate the mass rate of separation of the isotope U235 from a gaseous mixture of U238 and U235 by a molecular sieve.
The sieve is a porous pipe 0.0300 m in diameter and 2000. m long. The area of each pore is 2.60 × 10-19 m2 , and there are 109 pores per meter of pipe length.
The internal sieve temperature is 1000. K, and the partial pressure difference of the U235 across the sieve is 10.0 Pa.