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Explain what is the purpose of tapping the column in column chromatography as add the alumina? If you didn't do this what might the effect be on your separation?
determine the volume of the methane at stp if bacterial culture isolated from sewage produced 35.5 ml of methane ch4 at
How would doubling the concentration of the nucleophile affect the rate of the reaction in which t-amyl chloride is prepared from t-amyl alcohol via a unimolecular nucleophilic substitution. Explain. What effect would a more polar solvent have on ..
In what order would the amino acids arginine, leucine, and lysine be eluted from a Dowex-1 column at pH 10.5? (b) In what order would glutamic acid
A 1.3717-g sample of impure oxalic acid dihydrate, H2C2O4·2H2O, required 34.49 mL of 0.1211 M NaOH for titration to the phenolphthalein end point (both protons neutralized). Calculate the percent oxalic acid dihydrate in the sample.
Compute the final concentration of H+ or OH- if 24.0mL of 1.95M Ba(OH)2 is mixed with 34.0mL of 2.30M HCL. Presume the volumes are additive and that HCL and Ba(OH)2 are ionied completely.
HCFC-123 has been proposed as a substance for CFC-11. Explain how would you expect the following environmental properties to compare
A piece of metal weighing 5.10g at a temperature of 48.6 degree Celsius was placed in a calorimeter into a 20.0o mL of water at 22.1 degree celsius, and the final equilibrium temperature was found to be 29.9 degree celsius. What is the specific he..
how many seconds are there in a solar year 365.24 days expresses in the correct number of significant figures. 60 sec.
Carbon disulfide can be made from reacting sulfur dioxide with carbon. The reaction is: 5C + 2SO2 = CS2 + 4CO How many grams of carbon disulfide can be produced from 450 grams of sulfur dioxide if excess carbon is added
If One liter of maleic acid solution with a formal concentration of 0.0100 M was prepared. Neglecting the effect of activities, compute the composition that is list all of the species present in solution and their concentrations.
calculate the weight of potassium chlorate required to prepare 380ml of wet oxygen collected over water at 20degrees
Optically pure 2-octyl sulfonate, a compound with a leaving group comparable to the tosylate and mesylate groups discussed in this chapter, was treated with varying mixtures of dioxane and water as solvent
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