Please reference this text Separation Process Principles$3$rd edition

Chemical and Biochemical Operations

Two bulbs located at z$=0$ and z$=$L respectively are connected by a tube. The bulbs contain

mixtures of A and B$.$ The diffusivity is $0\mathrm{.}180$ cm$2/$s$.$ L$=0\mathrm{.}2$ cm$.$ Pressure and temperature are

constant at $25\backslash$deg C and $1$ atm. At t$=0,$ the mole fraction of A in the tube is shown in the below

figure. Answer the below questions.

Calculate the diffusion flux and total flux of A in the tube at t$=0$

What is the mole fraction of A and B in the bulbs when the system reaches steady state