atom has an electron Hg 13. Which ground-state a configuration described by the
ID: 573282 • Letter: A
Question
atom has an electron Hg 13. Which ground-state a configuration described by the 3 3d 4s A) Bromine B) germanium C) selenium D) tellurium E) none of these Using the figure below, categorize electromagnetic radiation with an energy of 14. 6.6 x 10-1e J/photon. Vice A) Gamma rays B) x rays C) Ultraviolet D) Infrared E) Microwave 15. Which of the following is the electron configuration for the bromide ion (Br)? A) [Ar B) [Ar4s23d104p C) [Kr] D) [Kr]5s24d105p E) [Xel 16. A mixture of three gases has a total pressure of 1,380 mmHg at 298 K. The mixture is analyzed and is found to contain 1.27 mol CO2, 3.04 mol CO, and 1.50 mol Ar. What is the partial pressure of Ar? A) 0.258 atm B) 5,345 mmHg C) 301 mmHg D) 356 mmHg E) 8,020 mmHgExplanation / Answer
13. A) The Bromine has the described electronic configuration
14. D) The energy of the given radiation = 6.6 * 10 -16 J/Photon
The energy of 1 Photon = 1.238 eV
Energy = (6.6 * 10-16 * 6.24 * 1018 ) /1.2398
= 3321.82 eV
= 3.32182 meV which comes in the range of the Far infrared region of the electromagnetic spectrum.
15. C) The extra electron goes into the vacant 4p orbital making it fully filled stable system resulting in the next noble element Krypton.
Kr = [Ar]3d10 4s2 4p6
16. D)
Pt = P (CO2) + P ( CO ) + P(Ar) = 1380 mm Hg
Partial pressure = Mole fraction of Ar * Ptot
Mole fraction of Ar = 1.5/(1.27+3.04+1.5)
= .258
Partial pressure of Ar = .258 * 1380 mm Hg =356.04 mm Hg
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