ExamName___________________________________MULTIPLECHOICE.Choosetheonealternativethatbestcompletesthestatementoranswersthequestion.1) Howmuchfasterdoes235UF6effusethan238UF6?A) 1.009timesasfastB) 1.013timesasfastC) 1.004timesasfastD) 1.018timesasfastE) 1.006timesasfast1)2) ThevanderWaalsequationforrealgasesrecognizesthat__________.A) thenon-zerovolumesofgasparticleseffectivelydecreasetheamountofʺemptyspaceʺbetweenthemB) molarvolumesofgasesofdifferenttypesaredifferentC) gasparticleshavenon-zerovolumesandinteractwitheachotherD) themolecularattractionsbetweenparticlesofgasdecreasesthepressureexertedbythegasE) alloftheabovestatementsaretrue2)3) AtSTP,theratiooftheroot-mean-squarespeedofCO2tothatofSO2is__________.A) 1.207 B) 1.456 C) 2.001 D) 1.000 E) 2.1193)4) Ofthefollowing,__________isavalidstatementofCharlesʹlaw.A) PV=constantB) V=constant×nC) V=constant×PD)VT=constantE)PT=constant4)5) Ofthefollowinggases,__________hasdensityof2.104g/Lat303Kand1.31atm.A) He B) Xe C) Kr D) Ne E) Ar5)6) Whichofthefollowingisnotpartofthekinetic-moleculartheory?A) Atomsareneithercreatednordestroyedbyordinarychemicalreactions.B) Attractiveandrepulsiveforcesbetweengasmoleculesarenegligible.C) Collisionsbetweengasmoleculesdonotresultinthelossofenergy.D) Thevolumeoccupiedbyallofthegasmoleculesinacontainerisnegligiblecomparedtothevolumeofthecontainer.E) Gasesconsistofmoleculesincontinuous,randommotion.6)17) Ofthefollowing,__________isacorrectstatementofBoyleʹslaw.A)PV=constantB)VP=constantC)VT=constantD)nP=constantE) PV=constant7)8) ThedensityofairatSTPis1.285g/L.WhichofthefollowingcannotbeusedtofillaballoonthatwillfloatinairatSTP?A) CH4B) HF C) NH3D) NO E) Ne8)9) Thevolumeofasampleofgas(2.49g)was752mLat1.98atmand62 °C.Thegasis__________.A) Ne B) SO3C) NO2D) SO2E) NH39)10) Ofthefollowing,only__________isimpossibleforanidealgas.A) V2=T2T1V1B)V1T1=V2T2C)V1V2=T1T2=0D) V1T1=V2T2E)V1V2=T1T210)11) Zincreactswithaqueoussulfuricacidtoformhydrogengas:Zn(s)+H2SO4(aq)→ZnSO4(aq)+H2(g)Inanexperiment,201mLofwetH2iscollectedoverwaterat27°Candabarometricpressureof733torr.Thevaporpressureofwaterat27°Cis26.74torr.Thepartialpressureofhydrogeninthisexperimentis__________atm.A) 0.964 B) 0.929 C) 1.00 D) 706 E) 76011)12) A255mLround-bottomflaskisweighedandfoundtohaveamassof114.85g.Afewmillilitersofaneasilyvaporizedliquidareaddedtotheflaskandtheflaskisimmersedinaboilingwaterbath.Alloftheliquidvaporizesattheboilingtemperatureofwater,fillingtheflaskwithvapor.Whenalloftheliquidhasvaporized,theflaskisremovedfromthebath,cooled,dried,andreweighed.Thenewmassoftheflaskandthecondensedvaporis115.23g.Whichofthefollowingcompoundscouldtheliquidbe?(Assumetheambientpressureis1atm.)A) C2H5OH B) C4H10C) C4H9OH D) C3H7OH E) C2H612)213) Thefirstpersontoinvestigatetherelationshipbetweenthepressureofagasanditsvolumewas__________.A) RobertBoyleB) LordKelvinC)JosephLouisGay-LussacD) AmadeoAvogadroE)JacquesCharles13)14) Thepressureexertedbyacolumnofliquidisequaltotheproductoftheheightofthecolumntimesthegravitationalconstanttimesthedensityoftheliquid,P=ghd.Howhighacolumnofwater(d=1.0g/mL)wouldbesupportedbyapressurethatsupportsa713mmcolumnofmercury(d=13.6g/mL)?A) 713mmB) 9.7×103mmC) 52mmD) 14mmE) 1.2×104mm14)15) Asampleofoxygengaswasfoundtoeffuseatarateequaltotwotimesthatofanunknowngas.Themolecularweightoftheunknowngasis__________g/mol.A) 128 B) 16 C) 8.0 D) 64 E) 815)16) Amixtureoftwogaseswasallowedtoeffusefromacontainer.Oneofthegasesescapedfromthecontainer1.43timesasfastastheotherone.Thetwogasescouldhavebeen__________.A) COandSF6B) O2andCl2C) Cl2andSF6D) O2andSF6E) COandCO216)17) AsampleofanunknownvolatileliquidwasinjectedintoaDumasflask (mflask=27.0928g,Vflask=0.1040L)andheateduntilnovisibletracesoftheliquidcouldbefound.Theflaskanditscontentswerethenrapidlycooledandreweighed(mflask+vapor=27.4593g).Theatmosphericpressureandtemperatureduringtheexperimentwere0.976atmand18.0 °C,respectively.Theunknownvolatileliquidwas__________.A) C7H14B) C6H6C) C6H14D) C7H16E) C6H1217)18) Accordingtokinetic-moleculartheory,ifthetemperatureofagasisraisedfrom100
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