Please solve them all and show work. Thank you!

Diffusion in Polymeric Materials 7. Question 6.34 Consider the diffusion of water vapor through a polypropylene (PP) sheet 2mm thick. The pressures of H2O at the two faces are 1kPa and 10kPa, which are maintained constant. Assuming conditions of steady state, what is the diffusion flux [ in [(cm3STP)/cm2-s] at 298K ? Fundamentals of Engineering Questions and Problems 8. Question 6.1FE Atoms of which of the following elements diffuse most rapidly in iron? (A) Mo (B) C (C) Cr (D) W 9. Question 6.2FE Calculate the diffusion coefficient for copper in aluminum at 600C. Preexponential and activation energy values for this system are 6.5105m2/s and 136,000J/mol, respectively. (A) 5.7102m2/s (B) 9.41017m2/s (C) 4.71013m2/s (D) 3.9102m2/s 10. Question: Assuming a linear concentration profile, calculate the diffusion flux. - Calculate the values of the diffusion coefficients for the interdiffusion of carbon in both -iron (BCC) and -iron (FCC) at 900C using the data in the given Table below. Which is larger? Explain why this is the case