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Statistical mechanics problem:
There is a system with four energy levels (with energies 0,1,2,3 units). If we have 10 distinguishable particles that must have a total combined energy 0f 10 units, determine the particle distributions allowed (there are 14) and calculate W (the number of micro states for each possible distribution.
What is the concentration ratio of CO2 (usually written as H2CO3) to HCO3- in blood at pH = 7.40. (carbonic acid Ka1 = 4.3 x 10-7)
A saturated solution of lead (II) bromide is prepared by dissolving the solid in water. the concentration of lead (II) ion in the solution is found to be 0.0115 M What is Ksp for this compound
If the barometer at your house reads 767.2 mm of mercury what is the atmospheric pressure in kPa
Give the number of atoms in the unit cell. Assume the structure consists of identical atoms. face-centered cubic a. one b. two c. four d. eight
Consider the diatomic molecules H2 and Cs2. For which is the Born-Oppenheimer approximation likely to introduce less error and why?
For the reaction Fe(OH)2(s)+H2O2(aq) -> Fe(OH)3(s), the reduction reaction is H2O2 -> 3OH-. The book states that the O2 from the H2O2 has a -1 charge and the OH from the Fe(OH)3 is -2.
A 3.664 g sample of a monoprotic acid was dissolved in water. It took 20.27 mL of a 0.1578 M sodium hydroxide solution to neutralize the acid. Calculate the molar mass of the acid.
Calculate Delta H kJ/mol NH4NO3 for the solution process. NH4NO3 ( s) yields NH4 (there is a plus sign above the four)(aq) + ^ + NO3(negative sign above the three) (aq)
You carefully weigh out 20.00 g of CaCO_3 powder and add it to 81.00 g of HCL solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is
Complete and balance te following half-reaction. in each case indicate whether the half-reaction is an oxidation or a reduction. 1.Mo^3+(aq)-->Mo(s)(acidic or basic solution)
The activity of the antibiotic penicillin slowly decomposes when stored in a buffer at pH 7.0, 298K. The time dependence of the penicillin antibiotic activity
Consider a galvanic cell that used the reaction: 2 Ag+(aq) + Sn(s) ? 2 Ag(s) + Sn2+(aq). Calculate the potential at 25°C for the cell given: [Ag+] = 0.010 M, [Sn2+] = 0.020 M
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