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A carboxylic acid can exist in two conformations E and Z that are different by the dihedral angle around the C-O bond. Recent theoretical calculations indicate that the Z conformer of formic acid is 4.04 kcal/mol (Tetrahedron, 2004, 60, 179-185) more stable than the corresponding E conformer. Assuming that the pKa of the Z conformer of formic acid is equal to 3.77, calculate the pKa of the E conformer of formic acid. Assume that ?G=1.4*pKa kcal/mol.
The Ksp of magnesium phosphate at a given temperature is 9.78 x 10-17. Calculate the molar solubility at this temperature.
carotenoids present in all organisms capable of photosynthesis extend the range of light absorbed by the organism. they
For bipyridine (bipy) determine the maximum number of coordination sites that the ligand can occupy on a single metal ion.
Express the concentration of .0220M aqueous solution of Fluoride, in mass percentage and parts per million. Assume the density of of the solution is 1.0g/mL
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3Cl.
if a solution of epsom salts prepared by dissolving magnesium sulfate heptahydrate in water is added to a solution containing sodium lauryl sulfate, will a precipitate form
What is the density of a block of marble that occupies 253 cm and has a mass of 752 g? Answer in units of g/cm
Draw the structural formula of 3,4-diethyl-3-hexene. If more than one isomer of this compound exists, then both isomers must be drawn
Some chemists believe that satisfaction of the octet rule should be the top criterion for choosing the dominant Lewis structure of a molecule or ion.
ethene (C2H4) and H2 form ethane (C2H6). If 159 kJ is given off per mole of C2H4 reacting, how much heat is released when 14.9 kg of C2H6 forms
A sample of 1.00 mol of perfect gas molecules, originally at 1.00 atm, with a molar heat capacity at constant pressure of 7/2 R is put through the following cycle:
The heat of fusion of ice(the heat associated with ice melting) is 6.0 kJ/mol. Find the temperature of the coffee after the ice melts.
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