As shown in Figure $1,$ chemical $C$ is diffusing from a bulk liquid into a sediment. The diffusivity

of $C$ in both the sediment and water can be assumed here to be $9\mathrm{.}10{10}^{-6}c\frac{m^2}{s}.$ The chemical

concentration at the sediment surface is $Cs=2m\frac{g}{L}.$

a$)$ What is the observed liquid mass transport coefficient for this system based on a bulk

concentration of chemical $C_{}=8\mathrm{.}5m\frac{g}{L}?(10$ points$)$

b$)$ What is the chemical flux into the sediment? $(10$ points$)$

c$)$ If L was multiplied by $100,$ how would the flux change? Explain. $(10$ points$)$