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Problem- Describe ways in which the retention or capacity factor can be increased. Are there any tradeoffs associated with these changes? Are there limits to the effect that increasing the retention factor has on chromatographic resolution?
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Draw an energy level diagram for the interaction of two atom each with an s orbital. Show how the MO's would be occupied if the two atoms in question were H atoms and if they were He atoms. What conclusions are to be drawn about the formation of a..
When the following equation is balanced using the smallest possible integers, what is the number in front of the substance in bold type. Na2S2O3 + I2 ? NaI + Na2S4O6
calculate the ground state energy, the radius of the first Bohr orbit, and the energy and frequency associated with the n=1 to n=2 transition in a mesonic atom.
Borazine B3 N3H6 is isoelectonic with benzene. Explain qualitatively the bonding in this molecule in resonance as well as molecular orbital theory.
A 50.0 ml sample of 0.100 M HNO3 is titrated with 15.0 ml of 0.200 M NaOH. What is the pH of the resulting solution, a) 1.00
Calculate the heat release when 62.0 g of steam at 129 C is converted to water at 50 C. Assume that the specific heat of water is 4.184 J/g x C
A casting of an alloy in the form of a disc weighed 50 g. The disc was 0.25 inches thick and had a circular cross section of diameter on 1.380 inches. What is the density of the alloy
the final step of the purification process in the miniscale procedure involves a simple distillation.
calculate the formal concentration of a sodium acetate solution prepared by diluting 45.0 ml of a solution containing
Question- Rank the following compounds from largest to smallest according to their expected magnitude in lattice energy. Rank from largest to smallest lattice energy to rank items as equivalent, overlap them.
Pt(NH3)2cl2+h2o yields pt(NH3)2(H2o)cl+cl- has a rate that increases by a factor of 15 and a temeprature that inceases from 25 tp 50 degrees celsius what is the value of Ea?
Calculate the pH at the equivalence point in titrating 0.010 M solutions of each of the following with 0.081 M NaOH. (b) hypochlorous acid (HClO), Ka = 3e-08 pH = _?_ It's not 8.3
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