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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.
Assuming that a neutron star has the same density as a neutron, calculate the mass (in kg) of a small piece of a neutron star the size of a spherical pebble with a radius of 0.20 mm.
A sample of 0.255 mole of gas has a volume of 748 mL at 28°C. Calculate the pressure of this gas. (R= 0.0821 L · K)
he equilibrium molar concentration of FeSCN2+(aq) in the resulting solution is 2.29 M Calculate the (a) initial molar concentration of FE 3+ after mixing (b) initial molar concentration of SCN- after mixing (c)equilibrium molar concentration of Fe..
A titration was set up with standard potassium permanganate solution(.020 M). A volume of 17 mL potassium permanganate was need to reach the endpoint.
Calculate the pH at the equivalence point for the titration of 0.200 M methylamine (CH3NH2) with 0.200 M HCl.
What volume in ml of 0.0293 M Ba(OH)2 is required to neutralize 25.00 ml of 2.00 M HN03
Determine how many kgs of Ca are there in a 205-pound man If 1.4 percent of the mass of a human body is calcium(Ca)?
Water gas, a mixture of carbon monoxide and hydrogen, is produced by treating carbon (in the form of coke or coal) with steam at high temperatures.
What is the empirical formula? What is the molecular formula? How many grams of oxygen gas were used to oxidize the original 2.035 grams of compound?
Give an example of a compound that exhibits ionic bonding and an example of a compound that exhibits a covalent bond.
A sample of ammonia, NH3, contains 3.3 x 1021 hydrogen atoms. How many nitrogen atoms are in this sample?
a zero-order reaction has a constant rate of 3.70times10-4 . if after 45.0 seconds the concentration has dropped to
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