大学化学智慧树知到期末考试答案章节答案2024年山东师范大学

大学化学智慧树知到期末考试答案+章节答案2024年山东师范大学.ItcanbejudgedbythemethodofpreparingoxygenbyKO2andCO2reaction.WhatvolumeofO2canbeobtainedfrom1.00LCO2andexcessKO2?

答案:1.50LAt0℃andanO2pressureof1.00atm,theaqueoussolubilityofO2(g)is48.9mlO2perliter.WhatisthemolarityofO2inasaturatedwatersolutionwhentheO2isunderitsnormalpartialpressureinair,0.2095atm?

答案:4.57*10^-4Fourhalogenatomscanformcarbonhalogenbondswithcarbon,buttheirbondenergiesvarygreatly,amongwhichthebondwiththehighestbondenergyis:

答案:FluorocarbonbondWhatistheessenceofcathoderays?

答案:electronHowmanyelectronscanbeplacedinthe3dsubshell?

答案:10Ofthe18valenceelectronsinO3,assigntothesp2hybridorbitalsoftheσbondframework.ofthesearebondingelectronsandarelone-pairelectrons.

答案:14,4,10Whatdescribetheverticaldistancefromthemidlineofawavetothepeakortrough

答案:AmplitudeWhichofthefollowingsubstancesarestrongbase?

答案:Ba(OH)2Howmanymolarofareproducedbythereactionof1.84gAlwith75.0mLof2.95MHCl?

答案:1.02molAcertainhydrateisfoundtohavethecomposition20.3%Cu,8.95%Si,36.3%F,and34.5%bymass.Whatistheempiricalformulaofthishydrate?

答案:CuSiF6·6H2OWhichelementhasthehighesteffectivenuclearcharge?

答案:CsBa(OH)2(aq)+MgCl2(aq),theionequationis?

答案:Mg2++OH-=Mg(OH)2Calculatethequantityofheat,inkilojoules,requiredtoraisethetemperatureof9.25Lofwaterfrom22.0to30.4°C.

答案:325.1Whatisthevalenceelectronnumberofborontrifluoride?

答案:24Thenumberofoxidesinnitrogenis?

答案:5IndicatetheoxidationstateofSinSO3

答案:6Vinegarisadiluteaqueoussolutionofaceticacidproducedbythebacterialfermentationofapplecider,wine,orothercarbohydratematerial.Thelegalminimumaceticacidcontentofvinegaris4%bymass.A5.00mLsampleofaparticularvinegaristitratedwith38.08mLof0.1000MNaOH.Doesthissampleexceedtheminimumlimit?(Vinegarhasadensityofabout1.01g/ml)

答案:4.53%Theforceoftheinternalmoleculesoftheliquidontheadhesionlayeriscalled？

答案:cohesionExplainwhichofthefollowingstatement(s)is(are)correctconcerningglucose(bloodsugar)C6H12O6

答案:Theratioofatomsisthesameasindihydroxyacetone（CH2OH)2COCalculatethefinaltemperaturethatresultswhena12.6gsampleofwaterat22.9°Cabsorbs875Jofheat

答案:75.6The

carbon

carbon

double

bond

in

ethylene

molecule

has

π

bonds,

and

the

carbon

carbon

triple

bond

in

acetylene

molecule

has

π

bonds

答案:1,2Whatisthemoleculargeometryofborontrifluoride?

答案:trigonalplanarWhatistheorbital,whenl=0

答案:sorbitalsInthefollowingreaction,81.2mLofO2(g)iscollectedoverwaterat230Candbarometricpressure751mmHg.WhatmassofAg2O(s)decomposed?(Thevaporpressureofwateratis21.1mmHg.)2Ag2O(s2)==4Ag(s)+O2(g)

答案:1.49gWhichofthefollowingelementshasthehighestfirstelectronaffinities?

答案:Mgwhichempiricalformulaofbenzenistrue?

答案:CHWhatisthemoleculargeometryofbrominetrifluoride?

答案:SquarepyramidalAmongtheraregases,whichonecanbeusedaslowtemperaturerefrigerantandwhichonehasthelowestionizationenergycanbeusedassafetygasfordischargelightsource?

答案:He,XeInNO3(-),electronsgettobeπbonding,electronsbeπnonbondingandbeπantibongding.

答案:2,4,0TheOstwaldprocessreferstowhichofthefollowingreactions?

答案:4NH3(g)+5O2(g)→(Pt/850°C)4NO(g)+6H2O(g)Whenorbitalsofidenticalenergy(degenerateorbitals)areavailable,electronsinitiallyoccupytheseorbitalssinglyis

答案:Hund'sruleHybrid

types

ofSF6is;GeometricOrientationis

答案:sp3d2;OctahedralWritethestructureformulafortheorganiccompound:3-hexanol

答案:CH3CH2CH2CH2OHCH2CH3ThenumberofoxidesinSodiumis?

答案:1Whichofthefollowingelementshasthelowestfirstionizationenergy?

答案:GaWhichelementbelowhasthelargestatomicradius?

答案:KWhichoxidationstateofSinfollowingcompoundis+6?

答案:S2O82-Whatisthepressure,inkilopascals,exertedby1.00*1020moleculesofN2ina305mLflaskat1750C?

答案:2.03kPaWhatistheoxidationstateoftheunderlinedelementinAl2O3;P4;Fe3O4

答案:3,0,8/3WhichconditionisnotrightaccordingtoSTP?

答案:22oCWhichofthefollowingreactionsisnottheoccurrenceandpreparationofhydrogen?

答案:2H2O(l)—>2H2(g)+O2(g)4valenceelectronsareassignedtotheπmolecularorbitals.gointothebondingorbital，intothenonbondingorbitalandintotheantibondingorbital.

答案:2,2,0The

hybrid

orbital

type

of

HgCl

2

is

and

the

molecular

space

configuration

is.

答案:sp,

linearForradiationofwavelength300.8nm,thelongestwavelengththatwillbringaboutthephotodissociationofoxygen,whatistheenergyofamoleofphotonsofthislight?

答案:3.977*105AccordingtothecombustionandexothermicreactionC(s)+O2(g)<=>CO2(g),whichmethiodcanspeedupthereaction?

答案:raisethetemperatureAsampleofnitrogengasexpandsinvolumefrom1.6Lto5.4Latconstanttemperature.Whatistheworkdoneinjoulesifthegasexpandsagainstaconstantpressureof3.7atm?

答案:-1430Jwhen0.455gofmagnesiumreactedwith2.315gofoxygen,0.755gofmagnesiumoxidewasobtained.Determinethemassofmagnesiumcontainedina0.500gsampleofmagnesiumoxide

答案:0.301gInozone,thebondorderassociatedwiththeπmolecularorbitalsis().

答案:1Agas,whileexpandingabsorbs25Jofheatanddoes243Jofwork.WhatisDUforthegas?

答案:-218JTwochargedbodiesthatareattractedtoeachother,howelectricallydotheybehave？

答案:OnepositivechargeandonenegativechargeWhatdescribeshellinSchrodingerWaveEquation?

答案:nWriteanorbitaldesignationcorrespondingtothequantumnumbersn=4,l=2,ml=0

答案:4d.Whatiswrongwiththefollowingstatement？

答案:O3isParamagnetic.Inachemicalreaction,ina0.5litercontainer,theamountofmolesofreactantBgoesfrom2.0molesto0.5molesin5seconds,andtherateofchemicalreactionin5secondsis

答案:0.6mol/L*sWhatisthewavelengthassociatedwithelectronstravelingatone-tenththespeedoflight?

答案:24.2pmWhat'stheenthalpyrelationshipbetweensinglebonds,doublebonds,andtriplebonds?

答案:increaseThe

carbon

carbon

double

bond

in

ethylene

molecule

has

sigma

bonds,

and

the

carbon

carbon

triple

bond

in

acetylene

molecule

has

sigma

bonds

答案:1,1Whatarethemolaritiesofthefollowingsoluteswhendissolvedinwater?57.5g(CH3)2COin525mLofsolution

答案:1.89MTheelectronconfigurationsofCris

答案:[Ar]3d54s1Asampleofnaturalgascontains8.24molesofCH4,0.421molesofC2H6,and0.116molesofC3H8.Ifthetotalpressureofthegasesis1.37atm,whatisthepartialpressureofpropane(C3H8)?

答案:0.0181atmWhatistheapproximateboilingpointofBr2?(boilingpoint:Cl2:239I2:458)

答案:348.5Whichofthefollowingnamesismostappropriateforthemoleculewiththestructureshownbelow?CH3CH2CHOHCH3

答案:2-butanolIonicbondandcovalentbondarecommonchemicalbond.Whatisthecorrectstatementaboutchemicalbond?

答案:ChemicalbondscanexistbetweenionsoratomsHowmanygroupsdoestheperiodictablehave?

答案:7Howmuchheatisassociatedwiththecompletecombustionof1.00kgofsucrose,C12H22O11

答案:-16500kJ____isthecheapestinertgas,and______cansynthesizenoblegascompounds

答案:Ar,XeWhatistheeffectivenuclearchargeofMg?

答案:2CalculatethestandardenthalpyofformationofCS2(l)giventhat:C(graphite)+O2(g)→CO2(g)DH=-393.5kJ/molS(rhombic)+O2(g)→SO2(g)DH=-296.1kJ/molCS2(l)+3O2(g)→CO2(g)+2SO2(g)DH=-1072kJ/mol

答案:86.3kJ/molThereactionof15.0gC4H9OH22.4gNaBr,and32.7gH2SO4yields17.1gC4H9Brinthereactionshown.C4H9OH+NaBr+H2SO4→C4H9Br+NaHSO4+H2OWhatarethetheoreticalyieldofthisreaction?

答案:27.8gHowmanygramsoflithoponeareproducedinthereactionof315mLof0.275MZnSO4and285mLof0.315MBaS?

答案:8.40gWhat'sthebondorderofHe2(+)andHe2?

答案:1/2,0Whichofthefollowingisthecorrectorderofionizationenergy？

答案:F>Cl>STherearetwokindsofgasinsamevolumeVandcertainamountshavedifferentpressureP1andP2(P1>P2),whenmaxandcompressthesegasestovolumeV,whatisthefinalpressureofthissystem?

答案:P1+P2Atrigonal-planarorientationoforbitalsisassociatedwithhybridorbitals.

答案:sp2Whichisnotincludedinintermolecularforce?

答案:hydrogenbondingThe

following

comparison

of

the

angles

of

SP,

SP

2

and

SP

3

hybrid

orbitals

is

correct

答案:sp

hybrid

orbitals

are

the

largesWhichsolutionhasthehighesttotalmolarityofions?

答案:0.008MBa(OH)2Whataretheeffectsofhydrogenbondsonthepropertiesofsubstances?

答案:TheabovethreeitemsWhatarethealuminumandsulfateionconcentrationsinAl2（SO4）3?

答案:0.0330M，0.0495MWhichoneisnoblegas?

答案:HeThecharacteristicsofreducingagents?

答案:causesanothersubstancetobereducedHowmanyresonancestructuresdocarbonateionshave?

答案:3Whatisthepressureinbar,exertedbyamixtureof1.0gH2and5.00gHewhenthemixtureisconfinedtoavolumeof5.0Lat20℃？

答案:8.5LWhichruledoesAvogadro'slawshowstous?

答案:V∞nA2.10-Lvesselcontains4.65gofagasat1.00atmand27.00C.Whatisthemolarmassofthegas?

答案:54.5g/molForthemineraltorbernitedetermineCu(UO2)2(PO4)2·8H2Othetotalnumberofrelativemolecularmassinoneformulaunit（U=238P=31)

答案:906Whichofthefollowingisnotatwo-phasesystem?

答案:brineTheelectricalpropertiesofthethreeparticles,1.αparticles2βparticles3γparticles

答案:positive,negative,neutralWhichofthefollowingionsisdiamagnetic?

答案:Sc3+UsethedatahereandcalculateDHfofbenzene,C6H6(l).2C6H6(l)+15O2(g)→12CO2(g)+6H2O(l)DH=-6535kJDHf[CO2(g)]=-393.5kJDHf[H2O(l)]=-285.8kJ

答案:49kJ/molWhatvolumeof10.0MH2SO4isrequiredtoprepare4.0Lof0.50MH2SO4?

答案:0.20LAmong

the

SP,

SP

2

and

SP

3

hybrid

orbitals,

which

p-orbitals

arethe

most

abundant

答案:sp3At25℃,watervapor’spartialpressure13.4mmHgandvaporpressure23.9mmHg.Calculatetherelativehumidity.

答案:56.1%Calculatethewavelength(innm)ofaphotonemittedbyahydrogenatomwhenitselectrondropsfromthen=5statetothen=2state.

答案:43.45nmWhatisthevalenceelectronnumberofnitrogentrifluoride?

答案:26Howmuchheatisevolvedwhen266gofwhitephosphorus(P4)burninair?P4(s)+5O2(g)→P4O10(s)DH=-3013kJ/mol

答案:6470KJWhataretheimportantfactorsdeterminingthestructureofioniccrystals?

答案:ChargeratioofpositiveandnegativeionsInthesampleofsulfurweighing4.07g,whatisthetotalnumberofsulfuratomsinthesample?

答案:7.64*10^22Whatisthedensityofoxygengas(O2)at298Kand0.987atm?

答案:1.29g/LFindtheEnglishnameofNO2-

答案:nitriteionWhichsolutionisthebestelectricalconductor?

答案:0.025MRbNO3Theproductsarelowerinenergythanthereactants,sowhatisthereaction?

答案:exothermic?Cu(s)+?HNO3(aq)→?Cu(NO3)2(aq)+?H2O(l)+?NO(g)Whentheequationisbalanced,thecorrectsetofstoichiometriccoefficientsis

答案:3,8→3,4,2.Whichofthefollowingtypeshasthegreatestdifferenceinelectronegativity?

答案:ionicWhichofthefollowingdoesnotonlyhavethedispersiveforce？

答案:H2SCalculatethestandardenthalpyofcombustionofethane,C2H6,acomponentofnaturalgas.(DHf[CO2]=-393.5KJ/mol;DHf[H2O]=-285.5KJ/mol;DHf[C2H6]=-84.7KJ/mol)

答案:-1559.7kJInonemoleofasolutionwithamolefractionof0.5water,howmanywatermoleculeswouldtherebe?

答案:0.5NAIntheLewisformula,the_atomisalwaysthecentralatom.

答案:CTheviscosityofglycerolishigherthanthatofwater（）

答案:对Theevaporationrateofliquidisconstantwhenitevaporates（）

答案:对TheboilingpointofwaterishigherthanthatofHFbecausethehydrogenbondenergyofHoishigherthanthatofHF.（）

答案:对Therearedispersiveforcesbetweenallpolarmolecules（）

答案:对Covalentcrystalissoft,lowmeltingpoint,poorconductorofheatandelectricity.（）

答案:对GeometricOrientationofBeCl2islinear.（）

答案:对ExperimentsshowO2isdiamagnetic.（）

答案:错TheCatomishybridizedtoproducetheorbitalsetsp2+p,asinC2H2.Twoofthesp2hybridorbitalsareusedtoformσbondswiththeHatoms.Theremainingsp2hybridorbitalisusedtoformaσbondwithoxygen.TheunhybridizedporbitaloftheCatomisusedtoformaπbondwithO.（）

答案:对Theshapeofamoleculeisdeterminedonlybytheorbitalsformingσbonds.（）

答案:对HybridtypesofPCl5issp3dandGeometricOrientationistetrahedral.（）

答案:错Acovalentbondisachemicalbondinwhichtwoormoreelectronsaresharedbytwoatoms.（）

答案:对Polarcovalentbondorpolarbondisacovalentbondwithgreaterelectrondensityaroundoneofthetwoatoms（）

答案:对AllthevalenceelectronsoftheatomsinaLewisstructuremustappearinthestructure.（）

答案:对Ionicbondsareformedbysharingpairsofelectrons.（）

答案:错Octetisusuallyaninertgasstructurewitheightouterelectrons.（）

答案:对NehasthesameelectronconfigurationastheNa+cation（）

答案:对Inthesameperiod,themoreyougototherightthelowertheelectronaffinityenergy.（）

答案:错Ionizationenergyistheminimumenergy(kJ/mol)requiredtoremoveanelectronfromagaseousatominitsgroundstate.（）

答案:对Theelectronconfigurationofchlorinecanbewrittenas[Ne]3s23p5（）

答案:对Cationisalwayslargerthanatomfromwhichitisformed.（）

答案:错Frequency(n)isthenumberofwavesthatpassthroughaparticularpointin1second(Hz=1cycle/s).（）

答案:对NotwoelectronsinanatomcanhaveallfourquantumnumbersalikeisthePauliexclusionprinciple.（）

答案:对(2,1,-1,-1/2)isanAppropriateCombinationoftheFourQuantumNumbers:n,l,ml,ms（）

答案:对BalmerSeriesdescribeUltravioletSpectrumRegion.（）

答案:错Lightisabsorbedase-movesfromoneenergyleveltoalowerenergylevelinBohr’sModeloftheAtom.（）

答案:错Nitrogencanbeusedasrefrigerant.（）

答案:对Oxygencanbeusedformetalsandwatertreatments.（）

答案:对Hydrogenisauniqueelementthatdoesnotfitintoanygroup.Hydrogencan‘toccurasinaqueoussolutionsandasinhydrides.（）

答案:错Thetransformationofoxygenintoozoneisanexothermicreaction.（）

答案:错ForthecompositionofAir,oxygen'svolumepercentis20.95%。（）

答案:对Enthalpyisastatefunction.（）

答案:对NH4NO3(s)couldbeusedformeltingice.（）

答案:错Exothermicprocessmeansthatheatabsorbedbythesystemfromthesurroundings.（）

答案:错Thestandardenthalpyofformationofapureelementinitsreferenceformis0.（）

答案:对H2O(s)→H2O(l)DH=6.01kJ/molItmeansthat6.01kJareabsorbedforevery1moleoficethatmeltsat0°Cand1atm.（）

答案:对AccordingtothecombustionandexothermicreactionC(s)+O2(g)＜=＞CO2(g),whenlowerthetemperatureofthesystemwhilenotchangeotherconditions,thespeedwillincrease.（）

答案:错Gaseshavemuchlowerdensitiesthanliquidsandsolids.（）

答案:对Thereisacertainamountofgasinacontainerworksatits2m2bottomwith5Nforce,thepressureofbottomis2.5kPa.（）

答案:错Charles'lawshowsusthatV∞TatconstantnandP.（）

答案:对AccordingtothereactionN2+3H2＜=＞2NH3,whenaddthepressureofthesystemwhil