The following substances were separated on a molecular exclusion (gel filtration) column.  Estimate the molecular mass of the unknown

in a 2-hour carburizing treatment, what temperature is required to obtain a 0.5% concentration of carbon at a depth of 0.5 mm below the surface of steel with a carbon concentration of 0.2%?considers that the inert gas used is enriched with carbon atoms at a concentration of 1.10% and that iron has an fcc structure

1. If the temperature decreases will the rate of diffusion will decrease or increase? 2. If the surface area for diffusion increases will the rate of diffusion increase or de- crease? 3. If equal amounts of Ar and He are being placed in a porous container and are al- lowed to escape, which substance will escape faster?