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MSE 430 Fall 2015 Problem Set
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.
potassium nitrate has a lattice energy of -163.8 kcalmol and a heat of hydration of -155.5 kcalmol. how much potassium
All of the following are balanced equations. State the number of atoms of each element in the reactant and in the products. a) 2N2(g)+3O2(g)--->2N2O3(g); b)Al2O3(s)+6HCl(aq)--->2AlCl3(aq)+3H2O(l); c) C5H12(l)+8O2(g)--->5CO2(g)+6H2O(g).
What will be the resultant pressure when the stopcock is opened?
A 706 mL gas sample at STP is compressed to a volume of 248 mL, and the temperature is increased to 39?C. What is the new pressure of the gas in Pa.
At 7645 oC, Keq = 1.12 for the reaction: 1/2 N2(g) + 1/2 O2(g) ? NO2(g) (a) What is the value of Keq for the reaction NO2(g) ? 1/2 N2(g) + 1/2 O2(g)? Keq = . (b) What is the value of Keq for the reaction N2(g) + O2(g) ? 2 NO2(g)? Keq = . (c) What ..
Calculate the wavelenght and frequencey of light emitted when an electron changes from n=4 to n=3 in the H Atom. In what region of the spectrum is radiation found
calculate the volume (L) the gas will occupy when the temperature is increased to 155 °C while maintaining the pressure at 629 torr.
derive the irreducible representations for the normal vibrations of XeF4 and determine which are IR active, which are Raman active
Question- In a kinetic reaction of a food colorant with sodium hypochlorite why are the dyes colored. And why does the color disappear when a dye reacts with sodium hypochlorite
Question- As the biochemistry lab supervisor, you need to prepare 2.5 L of 35 mM buffer at pH = 4.00 for an upcoming lab experiment. If you have available to you malic acid and sodium malate, then calculate the mass (g) of malic acid and sodium ma..
Because of its semiconducting properties, is sometimes used in electronic devices. The band gap energy for is 2.40 . What is wavelength of a photon with this energy
Find out how many grams of protein, FAT, and carbohydrate are present in a single serving of each item; then calculate the kilocalories that are present in each.
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