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For removal of a heavy metal from a waste stream by electrodeposition, the electrolyte porosity is anticipated to decrease with time as determined by Faraday's law. For a Pb2+ present at 10mg/liter, given a flow rate of 100 liters/hour, how large must the porous electrode be if it must be used for a minimum of a week before it is replaced. The original porosity is 50%. Assume 99.9% of the lead is removed.
Determine the original composition of the feed mixture and the composition of the resulting extract layer. free solution
If an externally applied electric field produces a 5% expansion of the lattice, compute the dipole moment for each Na+-Cl- pair. Assume that this material is completely unpolarized in the absence of an electric field.
Are the following processes exothermic or endothermic? after selecting the answer please explain why you selected it. a. When solid KBr is dissolved in water, the solution gets colder.
What is a Recycle reactor?In some reaction system, it is advantageous to divide the product stream and a partreturned to reactor as recycle to increase the conversion rate. These reactors are calledrecycle reactors.
Radioactive cobalt-60 is used to study defects in vitamin B12 absorption because cobalt is the metallic atom at the center of the vitamin B12 molecule. The nuclear synthesis of this cobalt isotope involves a three-step process. The overall reactio..
. A typical home will use about 40. kWh of electricity per day (1 kWh 1 kilowatt hour; 1 kW 1000 J/s). Assuming 8.0 hours of useful sunlight per day, calculate the minimum solar panel surface area necessary to provide all of a typical home's e..
Plot the system curve on the pump characteristic given in Figure and determine the operating point and pump efficiency. Properties of the fluid: density 900 kg/m3, viscosity 1.36 mN m-2 s.
Radioactive copper-64 decays with a half-life of 12.8 days. a. What is the value of k in s^-1? b. A sample contains 28.0 mg 64Cu. How many decay events will be produced in the first second?
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.
A 0.250-g sample of citric acid dissolved in 25.0 mL of water requires 37.2 mL of 0.105 M NaOH for complete neutralization. What number of acidic hydrogens per molecule does citric acid have?
What is the settling velocity in still air of a particle that is 40 µm in diameter and spherical? The particle has a density of 1400 Kg/m3. Use a density of 1.2 Kg/m3 and a viscosity
Write down a balanced chemical equation for the polymerization and Name the polymer formed by this polymerization.
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