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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):
The team monitoring a space probe exploring the outer solar system finds that radio transmissions from the probe take 3.15 hours to reach earth. How distant (in meters) is the probe?
An explosion breaks an object into two pieces, one of which has 1.5 times the mass of the other. If 7900 J were released in the explosion, how much kinetic energy did each piece acquire?
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.
Two billiard balls of equal mass undergo a perfectly elastic head-on collision. If the speed of ball 1 was initially 3.00 m/s, and that of ball 2 was 4.00 m/s in the opposite direction, what will be
A new model of mass 1200 kg takes 0.10 s from the time of impact until it is brought to rest. (Take the positive direction to be the original direction of motion.)(a) Calculate the average force exe
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
A 8 kg hammer strikes a nail at a velocity of 8.7 m/s and comes to rest in a time interval of 8.0 ms. (a) What is the impulse given to the nail? (b) What is the magnitude of the average force acting o
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.
What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
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
A 5640 kg open railroad car coasts along with a constant speed of 8.60 m/s on a level track. Snow begins to fall vertically and fills the car at a rate of 3.50 kg/min. Ignoring friction with the tra
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)
A 568- physics student stands on a bathroom scale in an 880- (including the student) elevator that is supported by a cable. As the elevator starts moving, the scale reads 480. If the scale reads zer
A long wire carrying a 5.0 A current perpendicular to the xy-plane intersects the x-axis at x= - 2.0 cm . A second, parallel wire carrying a 3.5 A current intersects the x-axis at x=+ 2.0cm .
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