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The first ionization potential of potassium is 419 kJ/mol. If UV-?radiation with wavelength ? = 250 nm is used to eject electrons from potassium, the energy of each photon in excess of the ionization potential provides kinetic energy to escaping electrons. The mass of an electron is 9.109 x 10-?31 kg. What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?
if c6h12o6 yields c2h5ohco2 then balance this equation and determine what the percent yield for the reaction isnbspif
what is the total pressure in a cannister that contains oxygen gas at a partial pressure of 804 mm Hg, nitrogen at a partial pressure of 220 mmHg, and hydrogen at a partial pressure of 445 mmHg.
The cost of the salt is $1.92 for 10 kg. A rich new source of CaCl2 was discovered and mined at $1.49 for 10 kg. Which salt is more cost effective?
Consider a reaction where 27.0 grams of mercuric oxide (a red solid compound) is heated and completely decomposes to give the elements oxygen and mercury. IF 2.0 grams of oxygen is produced by this reaction
In the acid-catalyzed dehydration of alcohols, an alkene and water are the reactions products. What method of separation has been used in order to collect samples
what would the magnitude of q need to be to give the experimental dipole moment? Express your answer as q divided by the proton charge. In other words, what fraction of a full proton charge is the charge magnitude of the ion pair?
Predict whether each of the following solvents is miscible or immiscible with hexane,C6H14. 1.) formic acid, HCOOH immiscible or miscible 3.) methyl ethyl ketone, C4H8O immiscible or miscible 2.) methanol CH3OH immiscible or miscible 4.) chlorofor..
at 400 K, the rate of decomposition of a gaseous compound initially at a pressure of 12.6 kPa, was 9.71 Pa/s when 10.0 % had reacted and 7.67 Pa when 20.0 % had reacted.Determine the order of reaction.
Calculate the molar solubility of bismuth sulfide, Bi2S3 (Ksp = 1.6 x 10-72) in (a) pure water, and (b) 0.05 M cadmium sulfide, CdS
A 45.5 g sample of copper at 99.8 degrees celsius is dropped into a beaker containing 152 g of water at 18.5 degrees celsius. What is the final temperature when thermal equilibrium is reached?
Rank each of the following measurements from smallest to largest
A solution (S1) of Yellow #5 has an absorbance far outside the linear region of Beer's Law. In order to determine the concentration of this solution, a serial dilution is performed. To make S2, 10 ml of S1 is diluted to 100 mL.
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