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Polychlorinated biphenyls (PCBs) have been used extensively as dielectric materials in electrical transformers. Because PCBs have been shown to be potentially harmful, analysis for their presence in the environment has become very important. PCBs are manufactured according to the following generic reaction: C12H10 + nCl2 yields C12H10n-1Cln + nHCl This reaction results in a mixture of PCB products. The mixture is analyzed by decomposing the PCBs and then precipitating the resulting Cl as AgCl. a. Develop a general equation that relates the average value of n to the mass of a given mixture of PCBs and the mass of AgCl produced. b. A 0.1947-g sample of a commercial PCB yielded 0.4791 g of AgCl. What is the average value of n for this sample?
An analyst gathered the following information about the return distributions for two portfolios during the same time period:
Demonstrate Comprehension Level of Learning for preparation and submission of documents according to a specified form.
Select a process variable (pressure / temperature / level / flow) and conduct a literature survey to determine recent developments in process instrumentation field. Identify any one novel instrument and explain in detail the working of the instr..
What is the empirical formula of this compound and does this compound behave as an ideal gas
question 1a a receptionist who has been working in a large accountancy firm for eleven months has been complaining of
Calculate the atomic weight (in amu) of an element (X), given the following data: 24X : 24.000 amu at 0.7879 fractional abundance 26X : 26.000 amu at 0.1017 fractional abundance 25X : 25.000 amu at 0.1113 fractional abundance
Burning the coke deposited on the catalyst particles generates all the heat necessary for catalytic cracking. Therefore, the coke burning rate is a critical parameter to control the rate of cracking. The composition of dry flue gas from the regenerat..
Name the micro structural products of 4340 alloy steel specimens that are first completely transformed to austenite, then cooled to room temperature at the following rates:
The physical properties of the fluid are: density 875 kg/m3, viscosity 1.46 mN m-2 s. Also, determine the NPSH, at this flow rate, if the vapor pressure of the fluid at the pump suction is 25 kN/m2.
oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9 sulfur trioxide. a.
1. Formation of kidney stones occurs when concentration of a poorly soluble salt (for example, calcium oxalate) in urine exceeds its solubility limit. Assume that a kidney stone has already formed and has traveled into the bladder. A bioengineer hypo..
adsorption and membrane processeszeolites are used to adsorb a wide range of solutes from vapour and gas streams. what
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