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If the interplanar distance in the crystal is 287 pm, and the angle of maximum reflection is found to be 7.28^\circ, what is the wavelength of the X-ray beam?
If 90% of the SO2 is captured in a flue-gas desulfurization unit and converted to CaSO4·2H2O how many tons of gypsum are produced per day?
Archimedes explored the density concept rather extensively, and developed the buyouncy principle. Buoyoncy can be simply expressed as "the buyount force is equal to the weight of fluid displaced."
The vapor pressure of a solution containing 53.6 f glycerin(C3H8O3) in 133.7 g ethanol (C2H5OH) is 113 torr at 40degrees celcius.
Write a balanced chemical equation for the reaction of sodium carbonate with sulfuric acid to form sodium sulfate, carbon dioxide, and water.
If a liquid is 0.83% oleic acid and there are 23 drops/mL, what is the volume of pure oleic acid in one drop of solution?
An antacid tablet was dissolved in 100.00mL of 0.300M HCl. 10.00mL of this solution was titrated to endpoint with 22.16mL of 0.0914M NaOH. How much calcium carbonate was in the antacid tablet?
How does using an excess of the olefinic reagent help improve the yield in epoxidations of olefins? Can you describe what is happening (in details) that improves the recovery of oxirane product?
Extract Cd2+ into an organic solvent as the Cd(CN)2 complex. the formation constants for Cd2+ with CN- =5.48, 5.14, 4.56 and 3.58 assume the extraction coefficient =4.5. What is the value of the ma
Indicate how this error would effect(increase, decrease, or no effect) the calculated molar volume of O_2 at STP (assuming you complete the experiment otherwise correctly):
What kinds of intermolecular forces must be overcome during the following phase changes. check all that apply. there may be more than one for each.
Write the expression for the thermodynamic Ka for acetic acid (CO3COOH); for example. using activities. Write out the concentration based constant as a function of Ka (thermodynamic) and the individ
The complex ion [Cu(H2O)6]^2+ has an absorption maximum around 800 nm. When four ammonias replace water, [Cu(NH3)4(H2O)2], the absorption maximum shifts to round 600 nm.
How do you know the spectra produced by flame tests of metal ion solutions comes from the cation, such as Na+, not the anion, such as Cl-? Describe an experiment you could perform to verify your an
For a certain substance, the heat of vaporization is 122.1 kJ/mol, and the absolute entropies of the gas and liquid phases are 151.5 and 97.9 J/K.mol, respectively, at the boiling temperature.
What makes up the bond order? Is it the electrons that are bonded or is it just the count of all the electrons? I know that you subtract the number of anti-bonding electrons from the bonding electro
Calculate the pH for (a) the initial acid solution in the flask, (b) the point at which 8.00 mL of the base has been added, (c) the equivalence point, and (d) the point at which 20.00 mL of the base
The reaction of an a particle with magnesium-25 (25(mass),12(atomic #)Mg) produces a proton (1(mass),1(atomic#)H) and a nuclide of another element. Identify the new nuclide produced. Also, write th
How many grams of copper would be deposited from a solution of copper(II) sulfate by a current of 3.00 milliamperes flowing for 6 hours?
Using the standard reduction potentials for the half reactions of a hydrogen-oxygen fuel cell, calculate the standard free energy change and equilibrium constant for the combustion of hydrogen.
Calculate the value of the Faraday constant, F, from the charge of 1 electron, 1.602x10-19 C. (Show all work to receive karma) (Hint: what are the units of the faraday constant and Avogradro's numb
Calculate the value of Gibbs free energy change and the equilibrium constant under standard conditions for the following reactions. (Show all work to receive karma pts)
Calculate the pH at the equivalence point for the titration of 0.20 M aniline (C6H5NH2, Kb = 3.8 x 10-10) with 0.20 M HCl. [Hint: remember the dilution factor caused by addition of titrant to the a
A particular solvent with and is being considered for an experiment. In the experiment, which is to be run at 75 , the solvent must not boil. Based on the total entropy change associated with the va
Calculate the molarity of a solution made by dissolving 0.810 grams of Na2SO4 in enough water to form exactly 890 ml of solution.