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The complex formed between Cu(I) and 1,10 phenanthroline has a molar absorptivity of 7000 L cm-1 mol-1 at 435 nm, the wavelength of maximum absorption.
The cohesive energy of a sodium chloride crystal is 6eV per ion pair, Neglecting the energy of repulsion, estimate the interionic spacing
The density of bcc iron is 7900 kg/m3 and its atomic weight is 56. Calculate the side of the cubic unit cell and the interatomic spacing
Suppose 50.0 mL of 0.250 M CoCl2 solution is added to 25.0 mL of 0.350 M NiCl2 solution. Calculate the concentration, in moles per liter, of each of the ions present after mixing. Assume that the vo
what is the change in temperature of the water after the ice has completely melted? The enthalpy of fusion of water is 6.02 kJ/mol, and the specific heat capacity of the liquid is 4.184 J/g/K. Assum
a solution that contains 5.94 ppm iron(III) is treated with an appropriate excess of KSCN and is diluted to 50 ml. What is the absorbance of the resulting solution at 580 nm in a 2.5 cm cell
At 580 nm the wavelength of its maximum absorption, the complex FeSCN2+ has a molar absorptivity of 7X10^3 L cm-1 mol-1 calculate
Capacitors C1 = 6.03 ?F and C2 = 2.45 ?F are charged as a parallel combination across a 298 V battery, Calculate the resulting charge on capacitor C1 and C2
What are the units for absorptivity where the path length is given in centimeters and the concentration is expressed in. a. parts per million
The spacing between the lines in the pure rotational spectrum of 11B-2H (numbers are superscripts) is 3.9214E-11 s^-1, Calculate the bond length of this molecule
find the total heat released by the reaction of 100.0 mL of 0.8500M NaOH and 100.0 mL of 0.8404M acetic acid.
Two electrons in an atom are separated by 1.5 × 10^?10 m, the typical size of an atom, What is the force between them
Include all reaction steps, a detailed mechanism and all reagents necessary. Make a note of any special purification steps if necessary. Synthesize 1,3,5-tribromobenzene from benzene or toluene.
Which indicator would be the best to use when titrating ammonia with nitric acid? Kb of NH3 is 1.8 x 10-5.
An electron and a proton are each placed at rest in an electric ?eld of 334 N/C. What is the velocity of the electron 46.2 ns after being released
Why does the non aqueous reaction of pyridine and SnCl4 produce a white precipitate
If the density of conduction electrons is 10^27 m^3 and the wire has a radius of one millimeter, what is the electrical current through this wire
A stock solution is prepared by adding 20 mL of 1.31 M AlCl3 to enough water to make 74 mL. What is the Al3+ concentration of 45 mL of the stock solution?
Three point charges of 2.0 ? C, 4.0 ? C, and 6.0 ? C form an equilateral triangle with each side 2.9cm Find the electric potential energy of this distribution
A sophisticated ultraviolet/visible/near-IR instrument has a wavelength range of 185 to 3000nm. What are its wavenumber and frequency ranges
An electron is released a short distance above Earth's surface, the first electron just great enough to cancel the gravitational force on it, How far below the first electron is the second
The entropy change for a reversible process can be defined by the expression ?S = q?/?T. Which statement about entropy change is not correct
Standard state is the physical state in which a substance is stable at 1 atm of pressure and a specified temperature
A particle with charge ?2 µC is located on the x-axis at the point 4 cm, What is the magnitude of the total electrostatic force on a third particle with a charge of -2 µC placed on the x-a
The likely formula for the compound is Ni(N2H4)2(ClO4°2 where the hydrazine is a neutral ligand and the nickel is +2. If 10g of this compound reacted completely into its component elements, how