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Which of the following expressions hold for 0.10 mol/L Na2HA(aq). (HA2- is the doubly-ionized form of H3A, a weak triprotic acid.) A) [H2A-] = 2 [HA2-] = 3 [A3-] B)0.5 [Na+] = [H3A] + [H2A-] + [HA2-]+[A3-] C) [H+] = [H2A-] + 2 [HA2-] + 3 [A3-] + [OH-] D)[H+] = [H2A-] + [HA2-] + [A3-] + [OH-] E) Ka1=[H2A-][H+]/[H3A] F)Ka2=Kw/Ka1 G)[H+] + [OH-] = Kw
A researcher conducts an experiment to determine the work function of a palladium surface. She fires a laser with a wavelength of 254 nm at a certain time and observes electrons hitting a detector
Draw N-ethyl-3-methylpentanamide. Draw your structural formula with all necessary hydrogen atoms.
Give the name of the most probably side product with the high melting point. d. Explain, with the aid of a mechanism, the role of H2SO4 in the reaction
What mass of sucrose should be combined with 479 of water to make a solution with an osmotic pressure of 8.00 at 315 ? (Assume the density of the solution to be equal to the density of the solvent.)
A natural gas mixture is burned in a furnace at a power-generating station at a rate of 13.0 mol per minute. (a) If the fuel consists of 9.3 mole CH4, 3.1 mole C2H6, 0.40 mol C3H8, and 0.20 mole C4H10, what mass of CO2 (g) is produced per minute? ..
The rate law for a hypothetical reaction is rate=k[a]2. when the concentration is .10 moles/liter, the rate is 2.7 times 10-5 moles/liter second. what is the value of k?
Compare the rms speeds. Compare the average kinetic energy. -Consider equimolar samples of the same ideal gas at the same temperature, but different volumes. Sample A has a larger volume than Sample B
Construct the MO diagram for planar BH3 and for pyramidal BH3. Based on your MO diagram , why is BH3 planar?
Indicate the reaction conditions you would employ to accomplish the following: Conversion of tert-butyl chloride to 2-methylpropene to maximize the yield of the elimination product over the substitution product.
the reaction a->b=c is found to be a zero order. If it takes 4.3 x 10^2 secounds for an initial conventration of A to go from .50 M to .25 M, what is the rate constant for the reaction
A quantity of ice at 0°C is added to 66.4 g of water in a glass at 55°C. After the ice melted, the temperature of the water in the glass was 15°C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol and the specific heat is 4.18 J/(..
What is the approximate value of the equilibrium constant, Kn, for the neutralization of hydrochloric acid with sodium hydroxide, shown in the equation below
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