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Applying quantum mechanics to a large molecule, say,hexamethylchicken wire, begins with building theHamiltonian. The larger the molecule, the more terms there will be, of course, but they all fit the same general pattern. Briefly, describe the categories that those terms will fit into.
Determine the concentration of sodium ions in a solution that is formed from mixing 50.0 mL of 0.233M NaCl with 100.0 mL of 0.158M Na2CO3.
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines
Which of the following has the lowest value of absolute entropy per mole? Conditions are as defined in each case.
A reaction has molar entropy change of -15 J/mol and molar enthalpy change of -12kJ/mol. What is the temperature requirement for this reaction to be spontaneous
Consider the reaction with the rate law, Rate = k[BrO3-][Br-][H+]2 By what factor does the rate change if the concentration of Br- is doubled? Just put in the number as a whole number or fraction.
Is the compositional (molecular) formula for a straight-chain alkene the same as for a straight chain alkane. Explain briefly.
If the heat of vaporization for Br2 is 29.6 kJ/mol and ΔS° for the vaporization is 88.9 J/mol⋅K, what is the boiling point for bromine?
a refrigerator uses r-134a and operates on the vapor compression refrigeration cycle. the isentropic efficiency of the
The pH of a 1.0 X 10^-7 M HCl aqueous solution is 6.79, and not 7.00 as you might expect with a simple pH = -log[H3O+] calculation. Propose an explanation for this phenomenon.
A solution of potassium chromate is prepared at pH 7.72. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
when m2s3 is heated in air it is converted to mo2. a 4.000g sample of m2s3 shows a decrease in mass of .277 g when it
Nitrogen dioxide dimerizes to produce dinitrogen tetroxide. Give a possible explanation for why this reaction occurs
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