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What is the overall flux of vinyl chloride through the bed? Answer in kg/m2 s. What is the mass rate through the bed in kg/h?
What is the desired gas flow rate to obtain a 1-h breakthrough in treating an air stream using a carbon bed of density 0.35 g/cm3.
Consider the city of Baton Rouge, Louisiana, with a population of 400,000. Determine the CO concentration in the atmosphere at 9 a.m.
The wind speed was 2 m/s and leak occurred on an overcast day. What is the likely concentration 10 km from the plant site?
What is the CO concentration after 2 h of cooking inside the hut? Compare the steady-state indoor CO concentration with the U.S. ambient air quality criteria.
Estimate the distance downwind of the spill that would exceed the worker standard exposure limit of 1 ppmv for DCA.
If the phosphorus settling rate is 10 m/y, estimate the average steady-state concentration of P in the lake. The depth of the lake is 1 m.
For a wind velocity of 5 m/s in the city, what is the steady-state concentration of CO in the city? What is the new steady-state concentration?
If the lake volume is V and has a volumetric flow rate of Q, obtain the steady-state concentration of Fe2+ in the lake.
A first-order reaction is 30% complete in 45 min. What is the rate constant in s-1? How long will it take for the reaction to be 90% complete?
Sulfur in the +4 oxidation state participates in a number of atmospheric reactions. What is the rate expression for the process?
Calculate the half-life of the reaction when CA0 is 2 mol/L. How long will it take for CA to change from 5 to 1 mol/L?
Determine the rate constant for the disappearance of B2 in units of m3/mol/s and m3/s.
What is the order of the reaction in B? Write down the expression for the rate of disappearance of B and the rate of appearance of A.
what is the concentration of Nitrogen dioxide in ppmv in air that has 21% oxygen at 1 atm. The total concentration of NO2 is 10 ppmv.
Estimate the equilibrium partial pressure of naphthalene over an aqueous solution containing 1 × 10-4 mol/L of naphthalene.
If water in the lagoon is overlying the sediment in equilibrium with it at 30oC. What is the concentration of ethylbenzene in the sediment (answer in mg/kg)?
The air above the lake is found to have traces of a pesticide (lindane) at a concentration of 1µg/m3. Determine the concentration of the pesticide in catfish.
Obtain the octanol-water partition constant of the compound; Obtain the vapor pressure of the compound from an appropriate correlation;
Determine log Kow of HBB using a group contribution method and derivative method. From data in (a) determine the aqueous solubility of BHH expressed in mol/L.
What is the total free energy of the redox process? How is the reaction affected in a slightly acidic lake water (pH = 6)?
Assume a linear adsorption constant Kd for a nonionic organic pollutant. Discuss your results with respect to the two compounds 1,2-DCE and p,p'-DDT.
The acid-catalyzed decomposition of urea has a rate constant of 4.3 × 10-4 h-1 at 334 K and 1.6 × 10-3 h-1. What is the rate at a room temperature of 300 K?
At values of pH > 2 acid catalysis is unimportant. The uncatalyzed reaction rate k0 is 4×10-5 s-1 at 20oC.At pH = 8, what is the rate constant of the reaction?
Convert all ingredients to pounds (show work) before applying the percentage. Report the percentage; you can do this in decimals.