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1. A calibration curve constructed from absorbance values of solutions containing a known concentration of permanganate ions has the following best-fit line: y = (3.62 × 103 L/mol) x where y is the absorbance of the solution at 525 nm and x is the concentration of MnO4- (aq) in mol/L. The pathlength of the cuvettes used in the experiment is 1 cm. Based on this information, what is the molar absorptivity of MnO4- (aq) at 525 nm? Be sure to include units in your answer.
Molar absorptivity of MnO4- (aq) at 525 nm: __________________________
2. A sample of steel weighing 0.1863 g was dissolved and the manganese present was converted to MnO4- (aq). Water was then added to give a final solution volume of 100.00 mL. A sample of this solution was examined and was found to have an absorbance at 525 nm of 0.620 (pathlength = 1 cm). What is the percent Mn in this sample of steel?
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