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09-exam3 - 2 1(24 a In the diagram below to the to the...

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1. (24) a. 2 In the diagr am below to the to the right, helium atoms are represented by unshaded spheres, neon atoms by gray spheres, and argon atoms by black spheres. If the total pressure in the container is 900 mm Hg, wh at is the parti~ressure of helium? A) 90 mm Hg ~ 180 mm HgC ) 270 mm Hg D) 450 mm Hg 0 o O. b. Which of the following is not a ~ e function? A) enthalpy ® h eat C) internal energy D) volume o .0. c. Which one of the followin g~ ses will have the high est rate of effusion? A) N02 ~ N20 C) N204 D) N03 SF(" '$ ,..""I "' DI A-r:: Q09/mol d. At what temperature will sulfur hexafluoride molecules have the same average speed as argon atoms at 20 °C ? JGt3 r:. A) -2ZJ(6 B) 73. C C) 381 °C @ 799°C e. Whi ch substance in each of the following pairs is expected to have the larger dispersion forces? I B rZ o r I Z '" ""o'o .... r~SS ~ A) Br2 in set I and n-butane in set" H H H H B) Br2 in set 1 and isobutane in set II I I I I I I E-t- C ----,:::-C- C- H © 12 in set I and n-butane in set" I I I I D) 12 in set I and isobutane in set II H H H H H- C- C---C -H n- bu t an e I I I H H H l.sDbut
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