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Explain the differences in values of the ligand field splittings (Delta = DeltaO or DeltaT for the cobalt complexes below): [Co(NH3)6]3+ ----> Delta = 22,900 cm-1, [Co(H20)6]3+ -----> Delta = 18,200 cm-1, [Co(NH3)6]2+ -----> Delta = 10,200 cm-1 [Co(NH3)4]2+ ----> Delta = 5,900 cm-1
if 0.150 moles of salicylic and excess acetic anhydride are used during a synthesis of aspirin, how many grams of aspirin will be obtained if the reaction gives a 38% yield.
Assume also that on a yearly basis the lake is completely mixed, and that the small river flowing into and out of the lake can be neglected as far as acidification is concerned. How many years will it be before the lake will reach a pH of 5.0?
the solubility of O2(g) in water is 4.43 mg O2/100 g H20 at 20 degree Celsius when the gas pressure is maintained at 1 atm. What is the molarity of the saturated solution?
sodium hypiodite is disolved in water to make 1.25L of solution. the solution pH is 11.32. What is the Kb value of the hypoiodite ion?
A fish tank holds 30.0 gal of water. Using a density of 1.0 g/mL for water, determine the number of pounds of water in the fish tank.
A gas is expanded in a cylinder from 2.00 L to 12.0 L against an external pressure of 1.80 atm. At the same time, it absorbs 2.56 x 103 J of heat from the surroundings. Calculate ?E of the gas in J. (1 L•atm = 101.3 J)
A layer of iron(III) oxide forms on the nail, increasing the nail's mass. How much oxygen has reacted with the iron if the mass of the nail has increased to 5.89 g?
A 4.78-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide. Calculate the mass percent composition of aluminum in aluminum oxide
How many grams of copper (II) sulfate are required to prepare 500 mL of a .25 M solution
Vapors are likely to be non-ideal near condensation temperatures. Would you expect such behavior to make your molecular mass to high or too low?
how many liters of 13.5 molar HCl stock solution are needed to make 10.5 liters of a 1.8 molar HCl solution?
In a separate experiment, 41.6 g of ClF3 was introduced into an empty 2.00 L container at 700.0 K . What are the concentrations of ClF3, ClF, and F2 when the mixture reaches equilibrium
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