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Calculate the expectation value for the potential energy of the H atom with the electron in the 1s orbital. Compare your result with the total energy
Draw the correct structure for (3S,4S)-3,4-dimethylhexane. Show stereochemistry clearly. To ensure proper grading, explicitly draw all four groups, including wedge/dash bonds
The optical rotation of a sample composed of only D-lactose is determned [a] abs = 0.99 degrees. [a]d is known to be 52.3 degrees of D-lactose.
Calculate the following values at 25C using standard potentials as needed. E°cell, E cell, deltaG°rxn, and deltaGrxn
Write the structures of all the alkenes that can be formed by dehydrohalogenation of each of the following alkyl halides.
A volume of 70.0 mL of aqueous potassium hydroxide (KOH) was titrated against a standard solution of sulfuric acid (H2SO4). What was the molarity of the KOH solution if 18.2 mL of 1.50 M H2SO4 was needed? The equation is 2KOH+H2SO4K-->2SO4+2H2O
The Kal of this aid is 1.0 x 10^-10 and Ka2 is 1.0 x 10^-10. Calculate the concentration of A2- in this solution.
What is the predominant form of Ile at pH 6 (assuming the pKa of the carboxylate is 3 and the amino group is 9?
If 69.5 kJ of heat is applied to a 1032 g block of metal, the temperature of the metal increases by 11.4°C. Calculate the specific heat capacity of the metal in J/g°C.
If the pressure of 50.0 mL of oxygen gas at 100 °C increases from 735 mm Hg to 925 mm Hg, what is the final volume? Assume temperature remains constant.
An alkyne of six carbon atoms gives the same single product in its reaction either with BH3 in THF followed by H2O2 /OH-, or with H2O/Hg2 /H3O . Draw the structure of the alkyne (containing only carbon and hydrogen atoms).
Hydrogen Sulfide gas has toxicity comparable to Hydrogen Cyanide, but because of its intense odor its presence is observed at concentrations well below toxic levels.
How many grams of dry NH4Cl need to be added to 2.10 L of a 0.500 M solution of ammonia, NH3 , to prepare a buffer solution that has a pH of 8.76? Kb for ammonia is 1.8*10 ^-5.
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