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Sketch a graph of potential energy versus dihedral angle about the C-C bond of 1,2-dichloroethane. Show the energy differences on your graph and label each minimum and maximum with the appropriate conformation of 1,2-dichloroethane. Note: The anti conformation of 1,2-dichloroethane is 4.81 kJ/mol more stable than the gauche conformation. The two energy barriers (measured relative to the energy of the gauche conformation) for C-C bond rotation are 21.5 kJ/mol and 38.9 kJ/mol.
an amino acid binding protein involved in transport of the amino acid across membranes was isolated from e. coli.
The pH at one half the equivalence point in an acid-base titration was found to be 5.73. What is the value of Ka for this unknown acid?
Calculate the pH of the following solution made from .210 M in pyridime (C5H5N) and .350 M in pyridime chloride (C5H5NHCl). Kb: 1/7 x 10^-9
Small molecules do not generally elicit an immune response, because they are monovalent, and because they aren't very foreign in most animals.
calculate the density and # of moles of a 10% Bromine Solution used in an experiment. Does the 10% refer to v/v or g/v in solution? I used 350 ul of the Bromine Solution
The osmotic pressure of this solution was 0.00178 atm at 25 C. Calculate the molar mass of hemoglobin, which is a molecular compound and a nonelectrolyte
This provides an estimate of the equilibrium concentration of gasoline in contact with the plastic. What percent of the gasoline in the initially full 2 gallon container is lost in a year
The pH of a sample of rain is found to be 3.2. Calculate the percentage of HSO4- that is ionized in this sample, given that the acid dissociation constant for the second stage of ionization of H2SO4 is 1.2E-2.
The solubility of cerium sulfate, Ce2(SO4)3, in water is 0.34 g per 100 mL at 100 °C and 14.2 g per 100 mL at 10 °C. Is the dissolving of cerium sulfate in water an endothermic or exothermic process
If the minimum energy required to break the C-Cl bond in CF3Cl is 540 kJ/mol, what is the longest wavelength of radiation that will break this bond?
A 0.9092-g sample of wheat flour was analyzed by the Kjeldahl procedure. The ammonia formed was distilled into 50.00mL of 0.05063 M HCl; a 7.46-mL back-titration with 0.04917 M NaOH was required. Calculate the percentage of protein in the flour.
Using the list of Active Ingredients provided, was there enough HCl added to completely neutralize the Naproxen Sodium? (Show ALL calculations below)
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