Basic Chemistry 基礎(chǔ)化學(xué)知到章節(jié)答案智慧樹2023年天津大學(xué)

BasicChemistry基礎(chǔ)化學(xué)知到章節(jié)測試答案智慧樹2023年最新天津大學(xué)第一章測試Solidshavea__________shapeandarenotappreciably__________.

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definite,compressibleThesymbolfortheelementpotassiumis__________.

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KTheSIunitformassis__________.

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kilogramThetemperatureof25°Cis__________inkelvins.

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298Thedensityofsilveris10.5g/cm3.Apieceofsilverwithamassof61.3gwouldoccupyavolumeof__________cm3.

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5.84ThecorrectresultofthemolecularmasscalculationforH2SO4is________.4×15.9994+32.066+2×1.0079

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98.079Thereare__________significantfiguresintheanswertothefollowingcomputation:(29.2-20.0)(1.79×105)/1.39

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2Ofthefollowing,__________isthesmallestmass.

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2.5×109fgAccuracyrefersto__________.

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howcloseameasurednumberistothetruevalueInwhichoneofthefollowingnumbersareallofthezerossignificant?

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100.09009第二章測試Acertainmassofcarbonreactswith13.6gofoxygentoformcarbonmonoxide.__________gramsofoxygenwouldreactwiththatsamemassofcarbontoformcarbondioxide,accordingtothelawofmultipleproportions?

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27.2Whichstatementbelowcorrectlydescribestheresponsesofalpha,beta,andgammaradiationtoanelectricfield?

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Alphaandbetaaredeflectedinoppositedirections,whilegammashowsnoresponse__________and__________resideintheatomicnucleus.

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Protons,neutronsWhichoneofthefollowingisnottrueconcerningcathoderays?

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ThecharacteristicsofcathoderaysdependonthematerialfromwhichtheyareemittedThechargeonanelectronwasdeterminedinthe__________.

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MillikanoildropexperimentIntheRutherfordnuclear-atommodel,__________.

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theheavysubatomicparticles,protonsandneutrons,resideinthenucleusAllatomsofagivenelementhavethesame__________.

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numberofprotonsAnatomofthemostcommonisotopeofgold,197Au,has__________protons,__________neutrons,and__________electrons.

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79,118,79Whichcombinationofprotons,neutrons,andelectronsiscorrectfortheisotopecopper-63,?

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29p+,34n°,29e?Isotopesareatomsthathavethesamenumberof__________butdifferingnumberof__________.

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protons,neutrons第三章測試__________iscreditedwithdevelopingtheconceptofatomicnumbers.

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HenryMoseleyElementsinthemodernversionoftheperiodictablearearrangedinorderofincreasing__________.

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atomicnumberThefirstionizationenergiesoftheelements__________asyougofromlefttorightacrossaperiodoftheperiodictable,and__________asyougofromthebottomtothetopofagroupinthetable.

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increase,increaseIngeneral,asyougoacrossaperiodintheperiodictablefromlefttoright:(1)theatomicradius__________;(2)theelectronaffinitybecomes__________negative;and(3)thefirstionizationenergy__________.

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decreases,increasingly,increasesWhichofthefollowingtraitscharacterizesthealkalimetals?

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thelowestfirstionizationenergiesinaperiodOxidesoftheactivemetalscombinewithwatertoform__________.

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metalhydroxidesAnalkalineearthmetalformsacompoundwithoxygenwiththeformula__________.(ThesymbolMrepresentsanyoneofthealkalineearthmetals.)

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MOWhichnon-metalexistsasadiatomicsolid?

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iodineTheonlynoblegasthatdoesnothavethens2np6valenceelectronconfigurationis__________.

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heliumWhatistheoxidationnumberofchromiumin[Cr(NH3)4Cl2]Cl__________?

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3第四章測試Thereare__________pairedand__________unpairedelectronsintheLewissymbolforaphosphorusatom.

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2,3Thereare__________unpairedelectronsintheLewissymbolforanoxygenatom.

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2Theelectronconfigurationofthephosphideion(P3-)is__________.

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[Ne]3s23p6Elementsfromoppositesidesoftheperiodictabletendtoform__________.

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ioniccompoundsDetermininglatticeenergyfromBorn-Habercycledatarequirestheuseof__________.

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Hess’slawHowmanyhydrogenatomsmustbondtosilicontogiveitanoctetofvalenceelectrons?

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4Inthemoleculebelow,whichatomhasthelargestpartialnegativecharge__________?

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FElectronegativity__________fromlefttorightwithinaperiodand__________fromtoptobottomwithinagroup.

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increases,decreasesTheLewisstructureofAsH3shows__________nonbondingelectronpair(s)onAs.

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1Theformalchargeoncarboninthemoleculebelowis__________.

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0第五章測試ThecorrectnameforK2Sis__________.

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potassiumsulfideThecorrectnameforH2SO3is__________.

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sulfurousacidThecorrectnameofthecompoundNa3Nis__________.

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sodiumnitrideTheionsCa2+andPO43-formasaltwiththeformula__________.

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Ca3(PO4)2ElementMreactswithfluorinetoformanioniccompoundwiththeformulaMF3.TheM-ionhas18electrons.ElementMis__________.

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ScTheconjugatebaseofHSO4-is

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SO42-WhatisthepHofanaqueoussolutionat25.0°Cinwhich[H+]is0.00250M?

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2.6Whatistheconcentration(inM)ofhydroniumionsinasolutionat25.0°CwithpH=4.282?

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5.22×10-5WhatisthepHofa0.0150Maqueoussolutionofbariumhydroxide?

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12.5第六章測試Whenthefollowingequationisbalanced,thecoefficientsare__________.NH3(g)+O2(g)→NO2(g)+H2O(g)

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4,7,4,6Whenthefollowingequationisbalanced,thecoefficientofAlis__________.Al(s)+H2O(l)→Al(OH)3(s)+H2(g)

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2Whenthefollowingequationisbalanced,thecoefficientofO2is__________.C2H4O(g)+O2(g)→CO2(g)+H2O(g)

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5Writethebalancedequationforthereactionthatoccurswhenmethanol,CH3CH(l)isburnedinair.Whatisthecoefficientofmethanolinthebalancedequation?

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2Thebalancedequationforthedecompositionofsodiumazideis__________.

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2NaN3(s)→2Na(s)+3N2(g)Thesolubilityofmanganese(II)hydroxide(Mn(OH)2)is2.2×10-5M.WhatistheKspofMn(OH)2?

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4.3×10-14Whatistheempiricalformulaofacompoundthatcontains49.4%K,20.3%S,and30.3%Obymass?

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K2SO3Acompoundcontains40.0%C,6.71%H,and53.29%Obymass.Themolecularweightofthecompoundis60.05amu.Themolecularformulaofthiscompoundis__________.

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C2H4O2Magnesiumandnitrogenreactinacombinationreactiontoproducemagnesiumnitride:3Mg+N2→Mg3N2Inaparticularexperiment,a9.27gsampleofN2reactscompletely.ThemassofMgconsumedis__________g.

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24.1Whichofthefollowingreactionsisaredoxreaction?(a)K2CrO4+BaCl2→BaCrO4+2KCl(b)Pb22++2Br-→PbBr(c)Cu+S→CuS

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(c)only第七章測試Agasatapressureof10.0Paexertsaforceof__________Nonanareaof5.5m2.

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55Agasvesselisattachedtoanopen-endmanometercontaininganon-volatileliquidofdensity0.791g/mLasshownbelow.Thedifferenceinheightsoftheis755mmHg.Giventhatthedensityofmercuryis13.6g/mL,thepressureoftheenclosedgasis__________atm.liquidinthetwosidesofthemanometeris43.4cmwhentheatmosphericpressure

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0.96Asampleofagas(5.0mol)at1.0atmisexpandedatconstanttemperaturefrom10Lto15L.Thefinalpressureis__________atm.

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0.67AsampleofH2gas(12.28g)occupies100.0Lat400.0Kand2.00atm.Asampleweighing9.49goccupies__________Lat353Kand2.00atm.

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68.2A0.325Lflaskfilledwithgasat0.914atmand19°Ccontains__________molofgas.

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1.24×10-2Asampleofgas(1.3mol)occupies__________Lat22°Cand2.5atm.

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13AflaskcontainsamixtureofHeandNeatatotalpressureof2.6atm.Thereare2.0molofHeand5.0molofNeintheflask.ThepartialpressureofHeis__________atm.

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0.74Theroot-mean-squarespeedofCOat113°Cis__________m/s.

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586AsampleofN2gas(2.0mmol)effusedthroughapinholein5.5s.Itwilltake__________sforthesameamountofCH4toeffuseunderthesameconditions.

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4.2UsingthevanderWaalsequation,thepressureina22.4Lvesselcontaining1.00molofneongasat100°Cis__________atm.(a=0.211L2atm/mol2,b=0.0171L/mol)

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1.37第八章測試Asolutionispreparedbydissolving15.0gofNH3in250gofwater.Thedensityoftheresultingsolutionis0.974g/mL.ThemolefractionofNH3inthesolutionis__________.

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0.0597Thevaporpressureofpurewaterat25°Cis23.8torr.Determinethevaporpressure(torr)ofwaterat25°Caboveasolutionpreparedbydissolving35gofurea(anon-volatile,non-electrolyte,MW=60.0g/mol)in75gofwater.

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21Thefreezingpointofethanol(C2H5OH)is-114.6°C.Themolalfreezingpointdepressionconstantforethanolis2.00°C/m.Whatisthefreezingpoint(°C)ofasolutionpreparedbydissolving50.0gofglycerine(C3H8O3anonelectrolyte)in200gofethanol?

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-120Asolutionispreparedbydissolving6.00gofanunknownnonelectrolyteinenoughwatertomake1.00Lofsolution.Theosmoticpressureofthissolutionis0.