Chapter 5, Problem 163CP

Calculate the number of stages needed to change amixture of ${}^{\text{13}}{\text{CO}}_{\text{2}}\text{and}{}^{\text{12}}{\text{CO}}_{\text{2}}$ that is originally 0.10%(by moles) ${}^{\text{13}}{\text{CO}}_{\text{2}}$ to a mixture that is 0.010% ${}^{\text{13}}{\text{CO}}_{\text{2}}$ by a gaseous diffusion process. (The mass of 13C is13.003355 u.)