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Dye "A" has molar absorptivities of 55,000 M-1 cm-1 at 465 nm and 23,000 M-1 cm-1 at 575 nm. Dye "B" has molar absorptivities of 18,000 M-1 cm-1 at 465 nm and 88,000 M-1 cm-1 at 575 nm. A sample containing an unknown mixture of A and B is measured in a 1.00 cm path length cuvette and its absorbances are found to be 0.182 at 465 nm and 0.398 at 575 nm. What are the concentrations of the two dyes in the unknown?
Calculate the mass of TRIS to use when it is mixed with 100 mL of 0.50 M HCl to prepare 1.00 L of buffer of pH=7.40. Also calculate the total concentration of the buffer.
If you used 0.165mL of acetic anhydride, and 0.167g of p-aminophenol what was the limiting reageant? How many moles of the non-limiting reageant remained after the reaction was complete
How many grams of Br2 would there be in 8.00 moles of Br2?
What is the equilibrium concentration of fluorine if the initial concentrations of bromine and fluorine were 0.111 moles/liter in a sealed container and no product was present initially?
How many grams of oxygen can be added to the balloon before it pops? Assume the balloon had no gas in it before oxygen is added.
Calculate the maximum [glucose]in/[glucose]out ratio that can be achieved by the plasma membrane Na+- Glucose antiporter of an epithelial cell when the concentration of Na+ inside the cell is 7mM
Correct the second part of each of the following statements. (Type your answer using the format copper(II) chloride for CuCl2, and CO2 for CO2.) (a) SF6 is sulfur heptafluoride. (b) Phosphorous pentachloride is Cl5P. (c) Carbon tetrachloride is CC..
What can make the titrated solution at the equivalence point in an acid-base titration have a pH not equal to 7
3- Complete combustion of 3 moles of cycloheptatriene (C7H8) would require how many moles of oxygen, and produce how many moles of water
According to the Bohr model, the allowed energies of the hydrogen atom are given by the equation: E = (-21.7 x 10-19)/n2 J. Which of the following energy levels is not possible in the Bohr hydrogen atom
calculate the percent yield based upon the amount of maleic anhydride used. use the molecular weight of one repeating monomer unit for the weight of the product.
how many milliliters of h2o vapor measured at 291. degc and 724. torr are formed when 49.0 ml of nh3 at 815. torr and
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