solution_pdf - spano velasco (ds28282) hw 01 Fakhreddine...

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spano velasco (ds28282) – hw 01 – Fakhreddine – (52395)1Thisprint-outshouldhave26questions.Multiple-choice questions may continue onthe next column or page – find all choicesbefore answering.0011.0 pointsFor which of the moleculesA) O2B) CO2C) SO2D) O3will dipole-dipole interactions be important?0021.0 pointsWhich of the following can form intermolecu-lar hydrogen bonds?Only molecules with H attached to the elec-tronegative atoms N, O, and F can hydrogenbond.Of the molecules given only CH3OHhas the H directly bonded to O, so it canundergo hydrogen bonding.0031.0 pointsWhattypesofintermolecularinteractionsdoes ammonia (NH3) exhibit?I) instantaneous dipole or van der WaalsII) dipole-dipoleIII) hydrogen bondingIV) covalent bonding0041.0 pointsIn which of these compounds would you findONLY dispersion forces existing between themolecules?I. CCl4;II. CO2;III. HBr;IV. NH3.
spano velasco (ds28282) – hw 01 – Fakhreddine – (52395)26.I and II onlycorrect7.I only8.III and IV only9.I and III only10.II onlyExplanation:A nonpolar covalent molecule would haveonly dispersion forces with another nonpolarcovalent molecule.0051.0 pointsConsider four moleculesI) CHCl3II) CH4III) CH3ClIV) CCl4Which of these exhibit permanent dipole-dipole interactions?1.I, III, and IV only2.I only3.None of these4.I and III onlycorrect5.III onlyExplanation:Dipole-dipole interactions occur in polarmolecules.CHCl3and CH3Cl are polar be-cause their dipole moments do not cancel.CH4and CCl4are symmetric; their dipolemoments cancel and the overall molecule isnon-polar.

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Term
Fall
Professor
Holcombe

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