This is a true story. A lawyer in Bloomington, Indi. ana, wanted to impress a judge with the high num ber of PCB molecules that a typical person takes in with each breath. He called Prof. Hites for this fact but he did not have this information at hand. How. ever, a student of his had recently determined that the flux of PCBS from the atmosphere to Blooming- ton's surface averaged 50 ug m year. You may assume that the area of Bloomington in 100 -2

This is a true story. A lawyer in Bloomington, Indi. ana, wanted to impress a judge with the high num ber of PCB molecules that a typical person takes in with each breath. He called Prof. Hites for this fact but he did not have this information at hand. How. ever, a student of his had recently determined that the flux of PCBS from the atmosphere to Blooming- ton's surface averaged 50 ug m year. You may assume that the area of Bloomington in 100 -2

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter33: Automated Methods Of Analysis

Section: Chapter Questions

Problem 33.6QAP

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Similar questions

The %purity of a powdered crude sample of Na2CO3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What CASE does this experiment satisfy?
At 0°C and 1 bar, a monolayer of CO adsorbed on 1 g of Fe/Al2O3 catalyst occupies a volume of 4.25 cm3. What is the area of the catalyst? The area per adsorbed particle is 0.165 nm2. Give your answer in m2.
The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. Write the balanced chemical equation of the reaction in your solutions sheet. What is the sum of all the coefficients of the balanced chemical equation? Determine the pressure of the trapped gas inside the eudiometer in mmHg. Determine the partial pressure of the collected CO^2 in mm Hg. How many millimoles of CO^2 was collected? What is the % purity of the sample to the nearest whole number?
The % purity of a powdered crude sample of Na^2CO^3 containing only inert impurities is to be determined by reacting 225.0 mg of the crude sample to 10.0 mL of 3.00 M HCl solution, and bubbling the resulting CO2(g) product in water that is at exactly 29 °C. After the reaction has completed, the level of the liquid inside the eudiometer rests 4.30 cm above the water level in the beaker. The graduation on the eudiometer indicates that the trapped gas is 44.37 mL. The experiment was done under a barometric pressure of 755.2 torr. What is the % purity of the sample to the nearest whole number?
A monolayer of CO molecules is adsorbed on the surface of 1.00 g of an Fe/AI2O3 catalyst at 77 K, the boiling point of liquid nitrogen. Upon warming, the carbon monoxide occupies 4.25 cm3 at O oC and 1.00 bar. What is the surface area of the catalyst?
Rationalise what adding Na2O (a network modifier) to B2O3 does to the structure of the glass. Begin by sketching the influence of Na(+) and O(2-) on the SRO of the glass to predict the observed changes to MRO and associated bulk properties. If you like, comment on the changes to the dynamics (eg. vibrations) in the glass after modification.
Chemistry An aquifer contaminated with petroleum is found to have the following component concentrations at a particular site: benzene158 ppm toluene124 ppm ethylbenzene91 ppm xylene45 ppm n-heptadecane161 ppm pristane 84 ppm Provide an estimate for the age of the spill at this site using (a) BTEX ratio and (b) nC17:Pr ratio. Show your calculations and use units throughout. Give proper s.f. for the answer.
What arc the advantages of microfabricated ISEs? Describe typical applications of this type of sensor.
An aquifer contaminated with petroleum is found to have the following component concentrations at a particular site: benzene 158 ppm toluene 124 ppm ethylbenzene 91 ppm xylene 45 ppm n-heptadecane 161 ppm pristane 84 ppm Provide an estimate for the age of the spill at this site using (a) BTEX ratio and (b) nC17:Pr ratio. Show your calculations and use units throughout. Give proper s.f. for the answer.
The average copper grade of the ore is 0.7 %. The total pregnant solution flowrate from all the leach pads is 8 000 m3/hr, with an average concentration of 1.8 kg/m3, with the concentration of copper in the lixiviant that is irrigated onto the heap being 0.2 kg/m3 (ignore any solution or copper losses to the environment in these calculations). What is the average copper recovery for the process?
Calculate volume and weight of sludge generated in thickener by chemical coagulation.Data given as:Wastewater flow: 10000 m3/dInlet concentration: 1100 mg/LFeCl3 added: 500 mg/LCaO added: 400 mg/LOverall particle removal efficiency: 80%Sludge’s specific gravity: 1.05Sludge’s moisture content: 95%Assume STANDARD chemical reactions and their product’s behavior as:FeCl3 + H2O → Fe(OH)3CaO + H2O → Ca(OH)2
Suppose you have a soil that is made up of 10% organic matter with CEC = 200 cmol/kg, 40% kaolinitewith CEC = 10 cmol/kg, and 50% vermiculite with CEC = 100 cmol/kg.1- Calculate the overall CEC of the soil by taking a weighted average of the three soil components.2- What percentage of the overall CEC is contributed by the organic matter? How does that numbercompare to the 10% of the soil itself that is organic?