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Suppose polyethylene molecules in a solution can exist in either a random-coil conformation or in a fully stretched-out conformation. The stretched-out conformation is 2.4 kJ/mol higher in energy than the random-coil conformation. What percentage of molecules are in the stretched-out conformation at 20 degrees Celsius?
Boltzmann distribution = (Nstr)/(Ntotal) x 100% (Nstr + Nrcoil)
The dimensions of a rectangular solid are 8.45 cm long, 4.33 cm wide and 2.85 cm high. If the density of the solid is 9.43 g/cm3, then determine the mass?
A 1.43-L flask is filled with propane gas (C3H8), at 1.00 atm and -23.0°C. What is the mass of the propane in the flask?
For the neutralization reaction involving HNO3 and Ca(OH)2, how many liters of 1.55 M HNO3 are needed to react with 45.8 mL of a 4.66 M Ca(OH)2 solution?
what is the composition of vapor of a pentane-hexane solution that has a vapor pressure of 373 torr at 25 degree celcius? Given is Pure Hexanes and pentanes vapor pressure at 25 degrees celcius. Pentane - 511 torr. Hexane -150 torr.
determine the maximum number of coordination sites that the ligand can occupy on a single metal ion.
the osmotic pressure of the solution is 0.443 atm. What is the percent ionization of this acid? I got 20% but its wrong
Enzymes in the human liver catalyze a large number of reactions that degrade ingested toxic chemicals. By what factor is the rate of a detoxification reaction changed
Calculate the hydrogen Ion concentration, in moles per liter, for solutions with each of the following pH values.
vitamin tablet contains 125 mg of vitamin C (C6H8O6). How many vitamin C molecules are contained in the tablet?
Two groups of students prepared the compound acetamide. Group A isolated is a solid with a melting point of 80.5 degrees C. Group B obtained a compound with a melting point of 74-77 degrees C
An aqueous copper(II) sulfate solution is electrolyzed for 3 hours with a 1.8 ampere current
Oxygen and hydrogen atoms combine to form molecules of wate. At the nuclear leveil, if one oxygen atom and one hydrogen atom were fused
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