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An open tubular chromatography column is 31.8 m long and has an inner diameter of 0.528 mm. The inside wall is coated with a layer of stationary phase 3.2 ?m thick. Unretained solute passes through the column in 2.23 min, while a certain solute has a retention time of 19.56 min.
(a) What are the linear and volume flow rates?(b) What is the capacity factor, k\', and the partition coefficient, Cs/Cm, for this solute?(c) What fraction of time did the solute spend in the stationary phase?
32.00mL of a .2500 M sodium hydroxide solution exactly neutralized a solution containing 0.5000 grams of a soluble solid acid that yields two moles of hydrogen ions per mole of acid when dissolved. Calculate the molar mass of the acid. Write balan..
Draw the best Lewis structure, and resonance contributors of equal energy (if any), for the molecule H2SO3 1- How many valence electrons are in your Lewis drawing
what is the concentration of sodium ions in the resulting solution?
Explain fructose solution with a concentration f 80mg/ml, but need to take 3.5L of fructose solution with a concentration of 300 mM.
A sample containing both enantiomers is found to have an observed rotation of +0.87 degrees in a one dm tube at a concentration of 0.025 g/mL. What is the optical purity of the sample? What is the % of the dominant enantiomer in this sample?
What stretches (presence and absence) will distinguish the product (cyclohexene) from the starting material (cyclohexanol)? Give the functional group and wavenumbers
The first equivalence point for the titration of 0.2567 grams of a weak acid is reached when a volume of 26.80mL of 0.0510 M NaOH(aq) has been added. What is the molar mass of the acid?
The student next added 3M KOH solution to the aqueous solution and Mg(OH)2 precipitated. After filtering the solution and drying the precipitate, the student recovered 1.10g of Mg(OH)2. Calculate the percent Mg(OH)2 in the mixture
A 3.84-mole sample of a gas is held at a temperature of 297 K and a pressure of 286 atm. Determine the volume of the gas sample.
Assume that sucrose is a molecular solid and does not ionize when it dissolves in water. Kf values are given here.
What the Ideal and Van der Waals Pressure of ethane gas at temperature of 500K and Molar Volume of 7.28 x 10^-5 m^3/mol?
Determine which of the following reactions are oxidation-reduction reactions and which are not. what type of reaction do you have if it is not an oxidation-reduction reaction?
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