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- Carbonic anhydrase is one of the fastest enzymes known. If 10 µg of this enzyme catalyzes the conversion of 0.30 g of CO2 to bicarbonate in 1 minute at 37˚C. What is the Kcat value for this enzyme in min -1?Organic carbon in seawater can be measured by oxidation to CO2 with K2S2O8, followed by gravimetric determination of CO2 trapped by a column of Ascarite. Water weighing 6.234 g produced 2.378 mg of CO2 (FM 44.010). Find ppm carbon in the seawater.Calculate the NCV of a coal sample having the followingcomposition: C=80%, H=5%, O=4%, S=3.5% and ash=5%.
- For the adsorption of a substance A from aqueous solution by charcoal at 25C, the Freundlich constants are n = 3.0 and k = 0.50 for y in grams per gram and C in g L-1. What weight of A will be adsorbed by 2 g of charcoal from 1 L of a solution containing originally 2 g of substance? Answer is [1 g]600g of molybdenum (C-0.25) is heated from 250K to 650K. What is delta H?Assume that a solute has a D* of 2.03 x 10-9 m2 / Sec and that w is equal to 0.5. If landfill leachate with a chloride concentration is next to a clay liner that is 2 m thick and the concentration of chloride is 2315 mg/L, what would be the chloride concentration at the outside of the liner after 25 years of diffusion. ? ignore any effects of advection. Defining a "release" from the landfill as a concentration exceeding 1 mg/l, how long will it take for a release to occur by diffusion alone? Provide answer in years to the nearest tenth. Eg: 10.3
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