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The raw sewage of a wastewater treatment plant has a BOD5 of 230 mg/L and suspended solids of 350 mg/L. Estimate the BOD5 and suspended solids concentrations in the primary effluent (assume typical removal efficiency for both parameters). How many kilograms per day of both parameters are removed if the flowrate of the treatment plant is 50,000 m3/d?
Calculate the molarity of a solution made by dissolving 0.650 Na2SO4 grams of in enough water to form exactly 950 mL of solution.
State the meaning of alpha and beta with regard to steroid structure, and indicate whether the hydroxyl group on ring A
Oxygen at 25 degrees C and a pressure of 1000 torr. At STP 1 mol of gas occupies 22.4 L What is the volume in liters of the oxygen gas in the cylinder?
Colligative Porperties : Freezing Point Depression, Salt lowers the freezing point of water. So will sugar. If one tablespoon of solid (salt or sugar) is dissolved in ¼ cup of water
The pH of a bicarbonate-carbonic acid buffer is 8.00. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
Vitamin C (L-ascorbic acid; MW = 176.0 g/mol) is a weak acid (pKa = 4.863). Suppose a 500.0 mg tablet is dissolved in water and titrated with 0.100 M NaOH. How many mL of NaOH are required to reach the equivalence point?
The temperature of the solution drops by 22.4 degrees Celsius. If the specific heat of the solution is 4.18J/g degrees C, calculate the enthalpy of the solution of ammonium nitrate.
One sample had a mass of 25 grams. The other had a mass of 50 grams. Would the same number of particles be ejected from each sample in the first hour?
How many grams of oxygen are collected in a reaction where 222 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?
suppose that coal of density 1.5g/cm3 is pure carbon. the combustion of carbon is described by the question C(s)+ 02(g)- CO2 H= -394kJ
The magnesium and calcium ions present in seawater([Mg2+] = 0.059 M and [Ca2+] = 0.011 M) can be separated by selective precipitation with KOH.
Determine How much sodium hydroxide (in grams) is required to form 546 mL of solution with a pH of 10.00?
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