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A.) A reverse osmosis unit is to be used to concentrate the aqueous solution of metal complexes left over from a metal finishing operation. A pressure of 100 bar is exerted on the solution side of the membrane during concentration. A disgruntled employee pours salt into the solution on the retentate (metal containing solution) side of the membrane. Is the pressure required to be exerted on the metal-solution side in order to keep the flux constant increased or decreased?
B.) A hollow fiber membrane module is used to separate a CO2/CH4 mixture. CO2 permeates easier through the membrane, and a high-flowrate sweep gas is passed outside the fibers to remove any permeating species. The current module is to be replaced with a new module with a larger cross-sectional area (ie, a larger number of fibers to pass the feed gas through), while maintaining all other parameters. How will this affect the mole fraction of CO2 in the gas exiting the fibers? (increased or decreased?)
Calculate the standard enthalphy change for the following reaction.
How many moles of oxygen atoms are combined with 4.20 moles of chlorine atoms in Cl2O7?
The speed of sound in air is 344 m/s at room temperature. The lowest frequency of a large organ pipe is 30 s-1 and the highest frequency of a piccolo is 1.5 x 104 s-1. Find the difference in wavelength between these two sounds.
The solubility of oxygen gas in water at 25 °C and 1.0 atm pressure of oxygen is 0.041 g/L The solubility of oxygen in water at 3.0 atm and 25 °C is __________ g/L.
One cup is equivalent to 237. mL. If 1 cup of oil has a mass of 210. g, what is the density of the oil (in grams per cubic centimeter)?
Creatine is a by-product of muscle metabolism, and creatinine levels in the body are known to be a fairly realiable indicator of kidney function.
For the reaction, A = B + C, the rate law is k[A]. If it takes 80.0 seconds for 70.0% of a 10.0 gram sample of A to be transformed into products, what is the value of the rate constant.
Aluminum nitrate and annonium chloride react to produce aluminum chloride, nitrogen and water. what mass of aluminum chloride is present after 43 g of aluminum nitrate and 43 g of amminium chloride have reacted completely
What volume of 2.0 M NaClO must be diluted with water to prepare 500.0 mL of 0.10 M NaClO?
the solubility of a salt in water represents the amount of solute necessary to reach a state of equilibrium between saturated solution and undissolved
A pressure cooker can be used to cook foods quickly under high pressure. The temperature inside a pressure cooker is 116 degrees celsius. Calculate the vapor pressure of water inside the pressure cooker.
Which compound is more reactive toward electrophilic substitution e.g nitration? Explain you reasoning.
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