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A sewage lagoon that has a surface area of 10 ha and a depth of 1 m recieving 8640m3*d-1 of sewage containing 100 mg*L-1 of biodegradable contaminant. At a steady state, the effluent from the lagoon must not exceed 20mg*L-1 of biodegradable contaminant. Assuming the lagoon is well mixed and that there are no losses or gains of waterin the lagoon other than the sewage input, what biodegradation reaction rate coefficient (d-1) must be achieved fo a first-order reaction?
A buffer is prepared by adding 11.0 g of ammonium chloride to 250 ml of 1.00 M solution...What is the pH of this buffer
How many liters of CO2 will be produced with the complete combustion of of methane (CH4) with 4.3L of oxygen?
Calculate the number of moles of carbon dioxide formed if 231 grams of calcium carbonate decomposes. CaCO3(s) ? CaO(s)+CO2(g)
A solution of the weak acid, HF, and a solution of the strong acid, HCl, have the same pH. Which solution will require the most sodium hydroxide, NaOH, to neutralize
A system comprised of chloroform, 1,4-dioxane, and ethanol exists as a two-phase vapor/liquid system at 50 degrees C and 55 kPa.
The solubility of MX2 is 8.91e-07 M. What is its Ksp to three sig figs? What is the molar solubility of M2X (Ksp = 1.38e-10)? M What is the concentration of M1+ in a saturated solution of M2X? M
What is the molality of a solution of 50.0 g of propanol(C3H7OH) in 752 mL water if the density of water is 1.00g/mL
The heat of formation (?H°f) of MgCO3 (s) is -1095.8 kJ/mol. The chemical equation associated with this reaction is: MgO (s) + CO2 (g) ? MgCO3 (s) Mg+ (s) + CO3- (s) ? MgCO3 (s) Mg (s) + CO3 (s) ? MgCO3 (s) Mg (s) + C (s) + 3/2 O2 (g) ? MgCO3 (s) ..
During the electrolysis of an aqueous solution of CuSo4 using inert electrodes, the mass of the anode remains the same but the cathode gains mass
Given the following equilibrium constants at 427 °C: Na2O(s) 2Na(l) + 1/2 O2(g) Kc = 2 x 10-25 NaO(g) Na(l) + 1/2 O2(g) Kc = 2 x 10-5 Na2O2(s) 2Na(l) + O2(g) Kc = 5 x 10-29 NaO2(s)
The Dumas method is used to analyze an unknown substance. 0.500 g of liquid was place in the 800.0 mL bulb. When heated to 68.7 C, the liquid vaporized, and the pressure was measured to be 154.5 mmHg.
A 5.0 ml sample of vinegar was titrated with 7.2 ml of 0.55 M NaOH. if the density of vinegar solution is 1.00g/ml, what is the mass percent of acetic acid present.
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