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Compute the equilibrium constant, Keq, for the reaction of equimolar amounts of acetophenone, C6H5COCH3, and hydroxide ion to generate the enolate ion. The pka values of the ketone and of water are 19.0 and 15.7 respectively?
what percent of the fuel consists of the lighter isotope? Assume that the masses of the two isotopes are exactly 235 and 238 amu.
Write the net ionic equation to show the formation of a precipitate (insoluble salt) when the following solutions are mixed. Write noreaction if no insoluble salt forms CaCl2(aq)+Mg3(PO4)2(aq)
Consider two samples of liquid: one mole of water H2O and one mole of ethanol C2H5OH. The density of water is 1.0 g/mL, and the density of ethanol is 0.785 g/mL. Answer each of the following questions by selecting the correct choice.
How many liters of liquid nitrogen are produced when 982.0 L of nitrogen gas is liquefied at 77.36K?
Using only the common 20 amino acids, how many differnt 4-amino acid-long polypeptides could be made?
what weigh tof CaCO3 is required to completely react 135 ml of a 0.665M solution. Must show set up.
At 298 K and 1 bar pressure, the density of water is 1.00 , and C=75.3J K^-1 mol^-1. The change in volume with temperature is given by delta V=Vinitial*beta delta T , where beta, the coefficient of thermal expansion
The Ksp for AgCl = 1.8x10^-10, @25 degrees Celsius. If the goal is to harvest silver ions from a film stop bath, and the plan is to get the silver ion concentration down to 18x10^-12 M, using NaCl, what concentration of Cl- ion, in M is required
The analysis was completed by titrating the excess acid with 11.37 mL of 0.1080 M NaOH. How many of these tablets represent a proper dose for patients whose weight is 100 lb (assume that 1 pound, lb, is 0.45 kg).
At what pH will this occur? Ignore complex formation and potential redox reactions.
A mixture of sand and iron pieces weighs 53.29 g. Using a magnet, the iron is removed and weighs 15.63 g. What is the percent composition of sand in the mixture?
The dissociation constant (Kd) for the complex is 4.00E-7. Find the absorbance at 550 nm of a solution prepared by mixing 50.0 ml of 2.00 mM A and 50.0 ml of 5.00 mM B. assume the absorbance is measured with a 1.00 cm cuvette.
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