# Question posted by wisdomlover

## wisdomlover from School of home study

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## Questions Posted by wisdomlover

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\$5.00 Closed, closed Chemistry Physical Chemistry electron density calculated from molecular orbital wavefunctions
Â  The electron density is defined as Â  N âˆ«Î¨*Î¨ d(all coordinates except one electron position) Where N is the number of electrons. Because of the Pauli principle, it does not matter which...
Apr. 15, 2012
\$3.00 Closed, closed Chemistry Physical Chemistry quantum theory(electron in 1D)
1) Calculate the position uncertainty delta X(average position) for states with high n(quantum bumbers). x^2 = integral from zero to L dx psi*(x) x^2 psi(x) - (L / 2)^2 2) How large is (delta p)^2 ?...
Feb. 09, 2012
\$1.00 Closed, closed Chemistry Physical Chemistry quantum theory
find the eigenvalues for: 1) operator d^3/dx^3 and eigen func. x^3 2) operator x(d/dx)+ y(d/dy) and eigen func. xy 3) operator d^2/d theta^2 and eigen func sin theta cos fsi
Feb. 08, 2012
\$1.00 Closed, closed Chemistry Physical Chemistry quantum theory(operators)
consider a self-adjoint operator A, along with its eigenvalue equation A fsi = fsi ai.  Show that the ai are real numbers. (Hint: ai real emans ai=a*i.
Feb. 08, 2012
\$1.00 Closed, closed Chemistry Physical Chemistry partial molar volume
at 25 degree C, the density of a 50 percent by mass ethanol/water solution is .914g/cm^3. Given that the partial molar volume of water in the solution is 17.4cm^3/mol, what is the partial molar...
Nov. 23, 2011
\$1.00 Closed, closed Chemistry Physical Chemistry entropy
calculate the increase in entropy when 3.5mol of monatomic perfect gas with Cp =5/2R is heated from 250 to 700K and simultaneously expanded from 20 to 60L.  Please also explain.
Oct. 26, 2011
\$1.00 Closed, closed Chemistry Physical Chemistry gas laws
calculate the final pressure when neon at 1 atm.  is compressed reversibily and adiabatically to 75% of its initial volume.  Please also explain.
Oct. 20, 2011
\$1.00 Closed, closed Chemistry Physical Chemistry entropy
calculate delta S for the system involving a change of state of 2mol of a diatomic perfect gas, for which Cp,m = 5/2R, is changed from 298.15K and 1.5atm to 408.15K and 7atm.  Please also explain.
Oct. 15, 2011
\$1.00 Closed, closed Chemistry Physical Chemistry the 1st law of thermodynamic
C12H22O11 + 12 O2  = 12 CO2 + 11 H2O Asample of sucrose, C12H22O11, weighing 0.1265g is burned in a bomb calorimeter. After the reaction is over, it is found that to produce an equal temperature...
Oct. 15, 2011
\$1.00 Closed, closed Physics General Physics induction and inductance13