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Unformatted text preview: 2 O 7 solution, a researcher started with 10.0 ml oF a concen-trated K 2 Cr 2 O 7 solution and mixed it with 50.0 ml oF deionized water. Then he diluted the obtained solution by a Factor oF 4. Calcu-late the molarity oF the original concentrated K 2 Cr 2 O 7 solution used by the researcher. Answer in units oF M. 004 6.0 points 0.4318 g oF compound A is dissolved in 150.0 ml oF solution. Then 8.00 ml oF the obtained solution is transFerred into a 100.0 ml volumetric ask and diluted to the mark. The absorbance oF the resulting solution is measured to be 0.457 in a 0.500 cm cuvette at 470 nm. The molar absorptivity For this compound at 470 nm is 3,264 M-1 cm-1 . Cal-culate the molecular weight oF compound A. Answer in units oF g / mole....
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This note was uploaded on 10/25/2010 for the course CH 204 taught by Professor Leytner during the Spring '08 term at University of Texas at Austin.
- Spring '08