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Explain carefully and clearly why the energy of the "4s" subshell is lower in energy than the "3d" subshell in the energy level diagram for C(g); whereas the "4s" subshell is higher in energy than the "3d" subshell in the energy level diagram for C+5(g). Necessary sketches used to facilitate your analysis - must be carefully explained.
Equal quantities of 0.010M solutions of an acid HA as well as a base B are mixed. The pH of the resulting solution is 9.3. If Ka for HA is 7.0×10?5, explain what is the value of the equilibrium constant for the reaction between HA and B?
A scientist wants to make a solution of tribasic sodium phosphate. Na3PO4 for a laboratory experiment. how many grams of Na3PO4 will be needed to produce 625 mL of a solution that has a concentration of Na+ ions of 0.700 M
Why can the nature of the metal salt precursor be changed during the epoxide addition method so easily without altering
Explain what is the silver ion concentration in a solution prepared by mixing 381mL of 0.382 M silver nitrate with 403mL of 0.433 M sodium phosphate
Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, the third contains 0.1 mol CaCl2.
What velocity would an electron 9.11*10^-31 kg need for its de Broglie wavelength to be that of red light 745nm ?
A 25.00 ml aliquot of a nitric acid solution of unknown concentration is pipette into a 125ml Erlenmeyer flask and 2 drops of phenolphthalein are added.
Compute the concentration of a solution prepared by adding up enough water to 2.3 g of sucrose (C12H22O11) to make a total of 80 mL of solution.
The intiala rates at various substrate concentrations for an enzyme-catalyzed reaction are as follows.
Mehtanol-water solutions behave as essentially ideal solutions (the activity coefficients which measure deviation from ideality are equal to or close to one).
Assume you dissolve 0.235 g of the weak acid benzoic acid, C6H5CO2H, in enough water to make 5.00 102 mL of solution and then titrate the solution with 0.163 M NaOH.
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles) of He is present in a helium-oxygen mixture having a density of 0.508g/L at 25C and 721mmHg?
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