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A five-stage CCD circuit is used to decontaminate a waste stream. The feed is 135 tonnes per hour (TPH), with 35.0 % by mass solids, and contaminated with 225 ppm of a toxic substance (call it X). The maximal level of X allowed in the decontaminated waste stream (underflow of stage 5) is 1.20 ppm.
(a) What amount of water (TPH) must be added to stage 5 to accomplish this?(b) What is the concentration of X, in ppm, in the overflow of stage 1 of the CCD circuit?
Cv and Cp denote the molar specific heat capacities of a gas at constant volume and constant pressure, respectively. Then (A) Cp âˆ' Cv is larger for a diatomic ideal gas than for a monoatomic ideal gas.
What is the equilibrium constant expression for the following reaction: C5H5NH(aq) + H2O(l) ? C5H5NH2+(aq) + OH-(aq)
Determine the value of work (w) when a piston of volume 0.2 litres expands against an external pressure of 200 kPa to a volume of 3.4 Litres?
Determine the following characteristics of the titration curve for 25.0 mL of 0.400 M NH3(aq) titrated with 0.335 M HI(aq). (For NH3, Kb = 1.8x10-5.)
Assume that the volume of Earth's oceans is 137 x 10^7 km^3 and that the density of seawater is 1.03 g/cm^3. Also assume that the heat capacity of seawater is the same as that of water.
The rate constant for a certain chemical reaction is 0.00250 M1 s1 at 25.0C and 0.0125 M1s1 at 50.0C. What is the activation energy for the reaction, expressed in kJ mol?
a fixed quantity of gas at 21 exhibits a pressure of 730 and occupies a volume of 4.40. use boyles law to calculate the
If the pressure exerted by ozone,O3 , in the stratosphere is 3x10^-3 and the temperature is 246 K, how many ozone molecules are in a liter?
the ternary compounds called chlorofluorocarbons, or Freons, have proved to be very valuable as refrigerants and as cleaning agents for circuit boards. Unfortunately, in the atmosphere these compounds produce chlorine atoms that catalyze the decom..
Consider the mechanism of reduction of WO3. At least two mechamisms are possible to the formation of HxWO3 during intercalation of WO3
The product is a cyclopentyl ether (five carbons with an oxygen). Then attached to a carbon directly adjacent to the oxygen is a methyl bromide group.
copper is electroplated from CuSO4 solution. A constant curent of 4.39 A is applied by an external power supply. How long will it take to deposit 1.00x10^2g of Cu
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