[helpimdiene]

Hey, having trouble with this question. Any help would be appreciated!

Disulfoton is an insecticide used to kill sucking isects in orchards.. The compound has a molecular weight of 274 grams, a vapour pressure of 1.700E-4 mm Hg, a water solubility of 11.4 mg/L and log Kow of 4.2.

From that, I calculated Kaw, Kfw, Ksoilw. I also know the rate constants for hydrolysis and photolysis. Now..

If one adds 12.5 grams of insecticide per day to an evaluative system composed of 6.50E+9 cubic meters of air, 6.80E+6 cubic meters of water, 2.00E+4 cubic meters of soil, and 6.9 cubic meters of fish, what is the concentration at steady state of disulfoton in the water compartment? Give your answer in moles per cubic meter. Assume that the air advection rate is 8 % per hour, the water advection rate is 9 % per day.

any ideas? equations? thanks.