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Beer's law states A=ebc, which directly relates the concentration(c) of a sample, its molar absorptivity (e) and the absorbance(A) of a sample. Instead of bothering with a standard curve why not make two measurements: first, measure the A of a sample of known concentration in order to compute e. second, measure the absorbance of the solution with un-known concentration and use the e from the first calculation to calculate the concentration.
Would this be a better method than doing the standard curve with different measurements. why or why not?
Explain what is the maximum mole percent of N2 in an air mixture that could be utilized by divers at depths up to 100.0 m below sea level without undue risk of nitrogen narcosis?
If the rate expression is first-order in SO2 and half-order in O2, calculate the value for k.
The allowable concentration level of vinyl chloride,C2H3Cl , in the atmosphere in a chemical plant is 2.4×10-6 .How many moles of vinyl chloride in each liter does this represent? How many molecules per liter?
So what have we discovered? What is the elemental identity? Show work in detail please. Displacement - 0.00202 L
Gaseous HBr has an absorption band centered at about 2645 cm-1 consisting of a series of lines approximately equally spaced with an interval of 16.9cm-1.
Explain if a gaseous sample contains 61% N2 by volume define the solubility of N2 in water at 25°C and 1.0atm. Is it possible to conclude from the information whether the complex is square planar or tetrahedral
AgCl has a 78.1% ionic character and a diplole moment of 11.5D. what is the distance between the Ag and Cl atoms?
Determine the delta G standard state at 298 K from the following standard state values at T= 298, Determine the delta G standard state at 1000K. assume delta H is independent of temperature
canned tuna was analyzed by the Kjeldahl method; 22.66ml of .1224M HCl were required to titrate the liberated ammonia. Calculate the percentage of nitrogen in the sample.
Alzarin yellow has a pH range of 10.1-12.1. What is its Ka. It is yellow at pH 10 ANd red at pH 12. What is the color of a solution with a pH 10.9 that has a few drops of alzarin yellow
If the water in your house has 1000.0 mg/L of calcium carbonate dissolved in it, How many grams of sodium oxalate could you mix with 100.0 mL of that water before a precipitate would form
Why have Personal Navigation Devices become popular and what technologies are required to facilitate the success of PNDs?
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