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A polycondensation reaction takes place between 1.2 moles of a dicarboxylic acid, 0.4 moles of glycerol (a triol) and 0.6 moles of ethylene glycol (a diol).
Calculate the critical extents of reaction for gelation using the Statistical Theory of Flory and the Carotheres Theory. Comment on the observation that the measured value of the critical extent of reaction is 0.866.
At two temperatures, 85 K and 135 K, the vapor pressures of a certain liquid were found to be 540 Torr and 830 Torr, respectively. From this information, determine the molar enthalpy of vaporization
in a rush a student only measured the mass of the empty beaker once before beginning the experiment and one more time
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
The natural abundance of 107 Ag is 51.84%. How many 107 Ag atoms are present in a piece of silver weighing 150 mg?
A cell composed of a platinum indicator electrode and a silver-silver chloride reference electrode in a solution containing both Fe2 and Fe3 has a cell voltage of 0.731 V.
Show the product of reacting excess methyl benzoate with ethyl propionate with a sodium ethoxide catalyst following hydrochloric acid
what is the dose in rads to the animal in the first 4.0 hours following the ingestion of the radioactive material?
How many grams of sodium hydroxide are needed to react completely with 50.1 mL of 0.145 MCoCl2 solution?
Consider the diffusion of dopant element A into crystalline wafer. The dopant rich coating is considered as a large source of A relevant to the amount of A diffused, so that the surface concentration CAs can be considered a constant.
Draw the major organic product of the regioselective reaction of 2-methyl-2-pentene with Hg(OAc)2 in presence of H2O. In your answer draw the expanded structure for the acetyl group (Ac). Ignore stereochemistry.
If 40.0 g of methane (CH4) is confined to 2.50 x10^3 mL at 200 degrees celsius, what pressure in atm does it exert
A sealed container with volume of one cu ft holds 40 lbs of isopentane at 150 degrees Fahrenheit. Calculate the volume of liquid in the container.
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