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One way to measure ionization energies is ultraviolet photoelectron spectroscopy (UPS, or just PES), a technique based on the photoelectric effect. In PES, monochromatic light is directed onto a sample, causing electrons to be emitted. The kinetic energy of the emitted electrons is measured. The difference between the energy of the photons and the kinetic energy of the electrons corresponds to the energy needed to remove the electrons (that is, the ionization energy). Suppose that a PES experiment is performed in which mercury vapor is irradiated with ultraviolet light of wavelength 55.9 nm. (a) What is the energy of a photon of this light in eV (1 eV = 1.602e-19J)? eV (b) Write an equation that shows the process corresponding to the first ionization energy of Hg. (Use the lowest possible whole number coefficients. Omit states-of-matter in your answer.) chemPadHelp Hg(g)=Hg+(g)+e- (c) The kinetic energy of the emitted electrons is measured to be 11.7 eV. What is the first ionization energy of Hg in kJ/mol? kJ/mol (d) Using this figure of ionization energies, determine which of the halogen elements has a first ionization energy closest to that of mercury. chlorine iodine bromine fluorine
Calculate the amount of energy in kilojoules needed to change 423g of water ice at -10 deg c to steam at 125 deg c . The following constants may be useful:
Converting Grams and Moles, To do this assignment, use your calculator to do the calculations required. Then invert the calculator to read the message word. Insert the message word into the appropriate space in the statement
Calculate the amount of heat required to completely sublime 14.0 g of solid dry ice (Co2) at its sublimation temperature
A certain second-order reaction has a rate constant of 1.10×10-3 at 27 C and an initial half-life of 226 . What is the concentration of the reactant after one half-life?
Compute the enthalpy change for this reaction per mole of this substance and dissolves via the reaction and the temperature of the solution rises to twenty eight degree celsius.
What mass (in grams) of O2 is contained in a 555 mL volume at a pressure of 760.0 torr, and at a temperature of 400.0 K?
A stock solution of NaCl is made taking 150.2g in enough water to make 200.0ml. A 10.00 ml sample of this stock solution is diluted to 250.0 ml.
using a sample of river water sample analyzed for total inorganic carbon ,The river pH= 7.1 and an inorganic C concentration of 6.97 mg C/L.c
what is the molarity of a solution prepared by dissolving 2.06g of NaOH in a volume of 500.0ml?
Percent Mass and Stoichiometry, You are the science officer on the Starship Enterprise. The ship is circling a new planet. The away team comes back with some rocks and minerals
the concentration of carbon monoxide in a sample of air is 9.2 ppm. there are how many molecules of CO are in 1 liter of 755 torr and 23 degrees celcius
Oxone is sometimes used in keeping swimming pool water clean. Describe using chemical reactions how Oxone keeps swiming pool water clean
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