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Poorly treated municipal wastewater is dis- charged to a stream. The river flow rate upstream of the discharge point is Qu = 8.7 m3/s. The discharge occursataflowofQd=0.9m3/sandhasaBODcon- centration of 50.0 mg/L. Assume the upstream BOD concentration is negligible. (a) What is the BOD concentration just downstream of the discharge point? (b) If the stream has a cross-sectional area of 10 m2, "what is the BOD concentration 50 km downstream? (BOD is removed with a first-order decay rate con- stant equal to 0.20/day.)
Two vessels are labeled A and B. Vessel A contains NH3 gas at 70°C, and vessel B contains Xe gas at the same temperature. If the average kinetic energy of NH3 is 7.1 10-21 J/molecule, calculate the mean-square speed of Xe atoms in m2/s2.
A 0.54 M solution of a compound in water has a density of 1.340 g/mL at 20°C. What is the molality of this solution. Assume that the mass of the solution is the mass of the solvent
Nitrogen dioxide and water react to produce nitric acid HNO3 and nitrogen monoxide.
Use the Henderson-Hasselbalch equation to calculate the pH of a solution that is 11.5g of HF and 25.0 g
Determine What is the ? Ssys for the process?(if it is given the specific heat capacity for ethanol is 2.42 J/g K.) express your answer in units of J/K
began with 81.0 mmol of isopentyl alcohol, how many grams of isopentyl acetate could you theoretically produced assuming only 65.0% attainable yield?
what are the allowed value for quantum numbers l,m, and s. Explain how this fits with the Mendeleev arrangement of the periodic table.
What is the molecular formula of a compound given the molar mass of the compound is 205.4 g/mol and the empirical formula is C3H5.
A water treatment plant has a flowrate of 40,000 m3/d. If the overflow rate is 25 m3/d/m2, determine the following:
If a solution containing 54.368 mercury(II) perchlorate is allowed to react completely with a solution containing 15.488 g of sodium sulfate, how many grams of solid precipitate will be formed?
15.0 moles of gas are in a 5.00L tank at 22.2°C. compute the difference in pressure between CH4 and an ideal gas under these circumstances. The van der Waals constants for CH4 are a=2.300L2⋅atm/mol2 and b=0.0430 L/mol.
During a lab experiment, we were to determine the relative level of saturation by adding, drop by drop, a solution of bromine in cyclohexane to oil and a fat, individually. However, the color that is supposed to be retained due to unreacted bromin..
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