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A student researcher performed a chromatographic seperation of caffine and aspartame with menthol as the mobile phase using C-18 column. The retention times for menthol, caffine, and aspartame were 29.7 s, 98.0 s, 140.0 s, respectively.
A.) What is the selectivity factor (relative retention) for this column?
B.) Calculate the hypothetical retention times for caffine and aspartame if their retention factors were reduced by 28.0 %. Assume the mobile phase retention time (tm= 29.7 s) remains constant.
Assuming the [potato extract] is 0.001 M and you are going to make a 10 mL solution and each drop is 1/20th of a mL calculate the [potato extract] in each reaction solution.
Empirical and Molecular Formula of Cadaverine, Cadaverine, a substance produced by the action of bacteria on meat, contains 58.55% C , 13.81% H , and 27.40% N.
Determine the iodide ion concentration (in molarity) in a solution containing 12.6 g CaI2 dissolved in 2750 mL of solution
Calculate the amount of heat transferred when 46.0 g of CH3OH is decomposed by this reaction at constant pressure.
How many grams of NO could be formed from a mixture of 44.7 g of NH3 and 42.7 g of O2? 2. How many grams of NH3 would remain?
Find the lowest temperature of vaporization and the highest temperature when there is liquid left over and Determine the range of temperatures which could be used for this process.
A gaseous mixture containing 0.220 mol fraction of carbon tetrachloride (CCl4) and 0.780 mol fraction of dry air is initially at 75.0°C and 1117 mmHg
Describe in detail(ex:individual resins used, etc) the purification of a protein from bovine live that has the following characteristics: Molecular weight of 86,500, pI= 8 and precipitates out of solution at 30% ammonium sulfate
Briefly explain why it was not necessary for you to determine the mass of unknown liquid that you transferred to the flask before heating.
2.00 x10^2 mL of .500 M HCl is mixed with 2.00 x 10^2 mL of .250 M Ba(OH)2. how many moles of water are produced in the reaction
How many grams of lithopone are produced in the reaction of 315ml of 0.275M ZnSO4 and 285 ml of 0.315M BaS?
How many mole of sodium hydroxide is contained in a lye solution in which 130 grams of sodium hydroxide
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