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102 Exam 2 practice F13 (from F12)

A 1s2 1s2 2s2 2s2 2p4 b 1s2 1s2 2s2 2s2 2p2 2p2 c

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Unformatted text preview: hemical reaction: H2(g) + O2(g) è༎ H2O2(g) ΔH = - 153 kJ/mol Using the bond energies in the appendix, estimate the bond energy for the O- O single bond. HINT: The H2O2 molecule has the following atomic connectivity H- O- O- H a. - 146 kJ b. +146 kJ c. +349 kJ d. - 502 kJ 35)Consider the nitroxyl anion [N=O]¯,. The lone pairs on the N atom are located in the ___________ orbitals, and the π bond is formed using a _____________ orbital. a. sp, sp b. sp2, sp2 c. sp, p d. sp2, p 36)What is the hybridization of the central Se atom in SeF6? a. sp2 b. sp3 c. dsp3 d. d2sp3 37)Allene is an organic molecule with the Lewis structure shown to the right. Based on this Lewis structure allene is best described as having: !H! !!!H! a. Planar with all 7 atoms in the same plane b. Non- planar with only 5 atoms in the same plane !!!!!!C!!!!C!!!!C!!!! c. Non- planar with only 3 atoms in the same plane !H! !H! !!!! d. Non- planar with only 2 atoms in the same plane ! ! CHEM 102 Fall 2013 Exam 2 Practice 6 Hunter College of the City University of New York Department of Chemistry & Biochemistry 38)The carbon- carbon σ bond in the organic molecule ethylene (CH2CH2) results from the overlap of which orbitals? a. p atomic orbitals b. sp hybrid orbitals c. sp2 hybrid or...
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