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In the recrystallization procedure, an Erlenmeyer flask is commonly used during the step in which the crude is dissolved in the solvent of choice. Furthermore, if the recrystallization is slow typically the flask is closed with a cork. What do you think is the reason for using a cork and not a plastic stopper (which would seal the flask better)
Calculate the theoretical yield of C2H5Cl when 110 g of C2H6 reacts with 226 g of Cl2, assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
The selection of enantiomerically pure (1S)-[endo]-(-)-borneol in the upcoming experiment presents a great opportunity to review some stereochemistry basics
at 25 degrees Celsius, the vapor pressure of water is 23.8 torr. What is the vapor pressure of a solution prepared by dissolving 65 grams of glucose in 150 grams of water?
Thermochemistry : Comparing Heat Capacity of Bricks and Water, A house is designed to have passive solar energy features. Brickwork incorporated into the interior of the house acts as a heat absorber. Each brick weighs approximately 1.8 kg
Can complex compounds like dioxin and furan actually be thermally oxidized and destroyed?? At what temperature would these compounds actually be destroyed.
What is the boiling point of the solution produced by adding 363 g of ethylene glycol (molar mass = 62.1 g/mol) to 1.5 kg of water? For each mole of nonvolatile solute, the boiling point of 1 kg of water is raised 0.51°C.
sample of a gas at 25.0 oC and at a pressure of 3 atm, what will the pressure be if the temperature is raised to 50.0 oC?
Small helium-neon lasers emit 4.62 mJ/s of light at 634 nm. How many photons does such a laser emit in one minute?
The lipid formed an emulsion when mixed with oil and water, reacted with aqueous sodium hydroxide to form soap, did not react with bromine, and gave a positive result for the ammonium molybdate test. Describe a lipid structure consistent with thes..
MgNH4PO4 6H2O loses H20 stepwise as it is heated. Between 40c and 60c the monohydrate is formed and above 100c the anhydrous material is formed. What are the phosphorus percentages of the monohydrate and of the anhydrous material?
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.210 M HClO(aq) with 0.210 M KOH(aq). (a) before addition of any KOH (b) after addition of 25.0 mL of KOH (c) after addition of 40.0 mL of KOH
In dilute solution the carbonyl absorption band of II occurs at 1702/cm. Explain this observation. stretching vibration in carboxylic acids is heavily mixed
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