Final Exam Quant.docx - Final Exam Quant 1)A chemical firm...

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Final Exam Quant 1)A chemical firm was hired to monitor a nearby lake for possible mercury contamination. Several samples were taken at different locations around the lake, including water samples, lake bottom samples and plant samples. When the chemist returned to the laboratory, the water samples were the first to be analyzed. The analysis began by removing a number of aliquots. An aliquot is- a precise liquid sample taken for analysis (answ)2)What type of chromatography has the following characteristics: solute equilibrates between mobile phase and surface of solid phase? 3)In the two types of HPLC based on the relative polarity of the two phases, which one has a more polar mobile phase but relatively less polar stationary phase? 4)When two analytes, A and B, are passed through a chromatography column, A emerges first. We can then say: 5)Light with a wavelength of 800 nm has an energy of: 6)Light with a frequency of 1.07 x 10^15 Hz has a wavenumber (in cm^01) of: 7)A sample absorbs too strongly at a particular wavelength. You could decrease absorbance at that wavelength by each of the following except: 8)A 0.0000299 M sample of Compund X in a solvent has an abosorbance of 0.282 at 528 nm in a 1.0000 cm cuvet. The solvent alone has an abosorbance of 0.056. What is the molar abosorptivity of Compound X? 9)(following question 8) A difference sample of Compound X in the same solvent hasan absorbance of 0.488 at 528 nm when measured with the same cuvet. What is the concentration of this second sample?

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