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FeCl2是一种常用还原剂，实验室制备无水FeCl2并测定FeCl3转化率，有关数据如表： C6H5Cl（氯苯） C6H4Cl2 FeCl3 FeCl2 ...
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高三下学期化学《》真题及答案
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下列物质不能由金属和酸反应直接制得的是
AgCl
FeCl2
MgCl2
AlCl3
FeCl3在现代工业生产中应用广泛某化学研究性学习小组模拟工业生产流程制备无水FeCl3再用副产品F
已知①Cl2+2FeCl2=2FeCl3②2KI+2FeCl3=2FeCl2+2KCl+I.2判断下
KI
＞
FeCl2
＞
FeCl3
FeCl3
＞
FeCl2
＞
KI
FeCl2＞
KI
＞
FeCl3
KI
＞
FeCl3＞
FeCl2
只用下列试剂中的一种就能将FeCl3FeCl2AlCl3和NaCl四种溶液区别开的是
KSCN溶液
AgNO3溶液
NaOH溶液
BaCl2溶液
FeCl3在现代工业生产中应用广泛某化学研究性学习小组模拟工业流程制备无水FeCl3再用副产品FeC
铁是应用最广泛的金属铁的卤化物氧化物以及高价铁的含氧酸盐均为重要化合物1要确定铁的某氯化物FeClx
要验证镁铁铜三种金属的活动性顺序下列设计方案可行的是
Cu、FeCl2溶液、MgCl2溶液
Fe、Cu、MgCl2溶液
Mg、CuO、FeCl2溶液
Fe、MgCl2溶液、CuCl2溶液
FeCl3在现代工业生产中应用广泛某化学研究性学习小组模拟工业生产流程制备无水FeCl3再用副产品F
弱碱性条件下将水中的ClO2-转化为Cl-除去若该反应体系中的物质有NaClO2NaHCO3FeCl
有NaClFeCl2FeCl3MgCl2AlCl3五种溶液用一种试剂就可把它们鉴别开来这种试剂是
盐酸
烧碱溶液
氨水
KSCN溶液
FeCl3在现代工业生产中应用广泛某化学研究性学习小组模拟工业流程制备无水FeCl3再用副产品FeC
铁是应用最广泛的金属铁的卤化物氧化物以及高价铁的含氧酸盐均为重要化合物1要确定铁的某氯化物FeClx
1新型材料纳米级Fe粉具有超强的磁性能用作高密度磁记录的介质以及高效催化剂等实验室采用气相还原法制备
铁是应用最广泛的金属铁的卤化物氧化物以及高价铁的含氧酸盐均为重要化合物1要确定铁的某氯化物FeClx
氯化铁是常见的水处理剂无水FeCl3的熔点为555K.沸点为588K.工业上制备无水FeCl3的一种
下列单质或化合物性质的描述正确的是
NaHSO4水溶液显中性
SiO2与酸、碱均不反应
NO2溶于水时发生氧化还原反应
Fe在足量Cl2中燃烧生成和FeCl2和FeCl3
当盐酸溶液中FeCL2达到饱和值时酸洗时间
很短
无变化
很长
判断存放的FeCl2溶液是否变质从现象观察看鉴定的方法为加入试剂若溶液出现则证明有存在实验室为了防止
FeCl3FeCl2和FeOH3是否都可以通过化合反应制取
工业上向500—600℃的铁屑中通入氯气生产无水氯化铁向炽热铁屑中通入氯化氢生产无水氯化亚铁现用如图
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﹣﹣﹣There'refourbedroomsinthehousewithitsownshower. ﹣﹣﹣That'swhatIwant.I'vegotafewkids. A.either B.neither C.each D.none
﹣ExcusemeJohnbutwhichisforme? ﹣Youcantakehalf.Theyareexactlythesame. A.either B.both C.any D.neither
直角三角形全都是直角．判断对错
TomarrivedatthebusstationquiteearlyfortheLondonbus.ThebusforLondonwouldnotleaveuntilfivetotwelve.Hesawalotofpeoplewaitinginthestation.Somewerestandinginlinesandotherswerewalkingabout.Therewasagroupofschoolgirls.Theirteacherwascryingtokeeptheminorder.Tomlookedaroundbuttherewasnowhereforhimtosit. Hewalkedintothestationcafé.Helookedupattheclockthere.Itwasonlytwentytotwelve.Hefoundaseatandsatdownfacingalargemirroronthewall.JustthenJohnoneofTom'sfriendscameinandsatwithTom. Whattimeisyourbus?askedJohn. OhthereisplentyoftimeyetansweredTom. OhI'llgetyousomemoreteathensaidJohn. Theytalkedwhiledrinking.ThenTomlookedattheclockagain. Goodheavens!It'sgoingback﹣ward!hecried.Afewminutesagoitwastwentytotwelveandnowit'shalfpasteleven. YouarelookingattheclockinthemirrorsaidJohn. Tomwantedtokickhimselfforbeingsofoolish.Thenextbuswasnottoleaveforanotherhour.Hehasneverlikemirrorsincethen. 1TheLondonbusleft. A.at1155 B.at512 C.before1155 D.after1155 2Tomwentintothestationcafébecause. A.Johnaskedhimtohaveacupoftea B.hewantedadrinkthere C.hewouldmeetafriendofhis D.itwasearlyyetandhewantedtofindaplacetosit 3Whattimewasitinfactwhenhelookedattheclockinthemirror? A.Halfpasttwelve. B.Halfpasteleven. C.Twentytotwelve. D.Halfpastone. 4Whichofthefollowingistrue? A.Tommissedhisbus B.Hehaslikemirrorsincethen. C.Thenextbuswouldleavesoon. D.TomarrivedLondonontime.
﹣IlovetheInternet.I'vecometoknowmanyfriendsontheNet. ﹣.Fewofthemwouldbecomeyourrealfriends. A.Ican'tagreemore B.I'mpleasedtoknowthat C.That'sforsure D.That'snotthecase
Whydowedream?It'saquestionresearchershavebeenstudyingforyears.Nownewresearchsuggeststhatsomedreamsmayresultfromthebrain'sefforttokeeplearningevenaswesleep. InastudyinBoston100volunteersweretrainedforanhouronamaze迷宫.Theytriedtofindtheirwaythroughthedifficultpuzzleasquicklyaspossible.Thenhalfofthevolunteerswereallowedtosleepfor90minutes.Theotherhalfstayedawakereadingorrelaxing.Theoneswhosleptwereaskedtodescribetheirdreamswhentheywokeup. Aftertherestthevolunteerswereaskedagaintosolvethemaze.Thosewhohadn'tsleptshowednoimprovementordidevenworseafterthebreak.Sleeperswhodidn'treportanymazerelateddreamsdidbetterbutshowedonlyalittleimprovement.Howeverfournaptakerswhoreporteddreamingaboutthemazeshowedasurprisingimprovement.Theyscored10timeshigheraftersleepinganddreamingaboutthemaze. Eventhoughthenumberofdreamerswassmalltheresearchersnotedthatthegapinlearningbetweenthedreamersandnondreamerswassowidethatthefindingwassignificant有意义的. Thedreamershadallperformedpoorlyonthetestbeforedreamingaboutit.Thatsuggeststhatstrugglingwithataskmightbethetriggerthatleadsthesleepingbraintofocusonitandworkonhowtodealwithit. It'salmostasifyourbrainisgoingthrougheverythingthathappenedtodayDrStickgoldascientistatHarvardMedicalSchoolsaid.Thethingsyou'reobsessed迷住witharetheonesthatyourbrainforcesyoutocontinuetodowith. 1Whatwerethevolunteersaskedtodoaftertherest? A.Toworkonanewmaze. B.Tocontinuetodothemaze. C.Totalkwitheachotherabouttheirdreams. D.Totellwhattheythoughtaboutthemaze. 2Accordingtothestudywhichgroupshowedthegreatestimprovement? A.Thosewhodidn'tsleep. B.Thosewhosleptbutdidn'tdream. C.Thosewhodreamedaboutthemazewhilesleeping. D.Thosewhothoughtaboutthemazebeforefallingasleep. 3TheunderlinedwordtriggerinParagraph5probablymeans. A.chance B.cause C.way D.idea 4What'sthebesttitleforthispassage? A.LearningWhileYouDream B.WhatDreamsStandfor C.DreamaGoodDream D.DreamsandHealth
用3个棱长为10cm的小正方体拼成一个长方体体积和表面积发生了什么变化
DearMary IreceiveyourE﹣mailjustnow.Don'tworryaboutme.I'mgettingonwellmyresearchworkinthelab.ButtomygreatsurpriseyousayyouwillgiveuplearningEnglish.Thereasonisthatbecauseyouhavenotdonewellinitrecentlyandyouhavelostinterests.I'mafraidIcan'tagreeonyou.IknowitisdifficulttolearnEnglishbutEnglishiswideusedintheworldtoday.Itwillbeimportanttoolinourfuturework.Besideitisbecomingmoreandmoreimportantinyourdailylife.Ifyoustudyhardyouwillsucceed.Dorememberwherethereisawillthereisaway.I'mlookingforwardtoheargoodnewsfromyou.
IneversawmyfatherhomefromworklateorillnordidIeverseemyfathertakeanightoutwiththeboys.Hehadnobobbiesbutjusttookcareofhisfamily. For22yearssinceIlefthomeforcollegemyfathercalledmeeverySundayat900am.Hewasalwaysinterestedinmylife﹣howmyfamilywasdoing.ThecallsevencamewhenheandmymotherwereinAustraliaEnglandorFlorida. NineyearsagowhenIboughtmefirsthousemyfather67yearsoldspenteighthoursadayforthreedayspaintingmyhouse.Hewouldnotallowmetopaysomeonetohaveitdone.AllheaskedwasaglassoficedteaandthatIholdapaintbrushforhimandtalktohim.ButIwastoobusyforIhadalawpracticetorunandIcouldnottakethetimetoholdthepaintbrushortalktomyfather. Fiveyearsagomy71﹣year﹣oldfatherspentfivehoursputtingtogetheraswingset秋千formydaughter.AgainallheaskedwasthatIgethimaglassoficedteaandtalktohimButagainIhadlaundrytodoandthehousetoclean. ThemorningonSundayJanuary161995myfathertelephonedmeasusualthistimehehadseemedtohaveforgottensomethingswehaddiscussedtheweekbefore.IhadtogettochurchandIcuttheconversationshort. Thecallcameat440am.ThatdaymyfatherwassenttohospitalinFlorida.IgotonaplaneimmediatelyandIvowed发誓thatwhenIarrivedIwouldmakeupforthelosttimeandhaveanicelongtalkwithhimandreallygettoknowhim. IarrivedinFloridaat100ambutmyfatherhadpassedawayat912pm.Thistimeitwashewhodidnothavetimetotalkortimetowaitforme. IntheyearssincehisdeathIhavelearntmuchaboutmyfatherandevenmoreabouteverysingleday. 1Weknowfromthereadingthatthefather. A.likedtopainthouses B.hadnofriendsaroundhim C.wasnothealthyinhisyouth D.thoughtofhisfamilyashisall 2Whenherfatherpaintedherfirsthousethedaughter. A.couldonlyaffordaglassoficedtea B.wastoobusytotalktoherfather C.coulddonothingbutholdapaintbrush D.spenteighthoursadayworkingwithherfather 3OnJanuary161995thedaughterfeltthatherfather. A.seemedtobealittledifferent B.hadnotimetophoneherasusual C.becameinterestedinchurch D.hadforgottentodiscusssomethingswithher 4Inthereadingtheunderlinedphrase‘gettoknowhim'mostprobablymeans. A.gethimtoknowher B.knowmoreabouthim C.gethimtoknowhimself D.makehimwell﹣known 5Whichisthebesttitleofthereading? A.PaintingHouses B.Daughter'sFamily C.FatherandI D.Father'sphonecalls
BeforeweleftLiYanpingexplainedtomethattheforceofgravitywouldchangethreetimesonourjourneyand1thefirstchangewouldbethemostpowerful.Thenwewereoff.Astherocketroseintotheairwe2pullbackintoourseatsbecauseweweretryingtoescapethepulloftheearth'sgravity.Itwasso3strengththatwecouldnotsayanythingtoeachother.GraduallytheweightlessenedandIwasabletotalkto4he.Whyisthespaceshipnotfallingbacktotheearth?OntheearthifIfallfrom5treeIwillfalltotheground.Iasked.Wearetoofar6theearthnowtofeelitspullhe7explainsowefeelasifnogravityatall.Whenweget8closetothemoonlittlebylittleweshallfeelitsgravitypullingusbutitwillnotbeaspowerfulapullastheearth's.Icheeredupimmediatelyandfloated9weightlessaroundinourspaceshipcabin10watchtheearthbecomesmallerandthemoonlarger.
ThereisanoldEnglishsayingLaughteristhebestmedicine.OnepersoncertainlywouldhaveagreedwiththisisNormanCousins. NormanCousinswastheeditorofamagazinecalledSaturdayReviewforalmostfortyyears.Healso1andspokeaboutworldpeaceandanti﹣warissues反战议题travelingtomanydifferentcountriestosharehis2. Inthe1960safterreturningtotheUnitedStatesfromabusyandtiringtriptoEurope.Mr.Cousinsgot3.Hediscoveredhehadastrangediseasethatcausedgreatpaininhisbones骨头. Inlessthanaweekafterhegotbackhecouldnot4it.Everymovethathemadewaspainful.Hewasnotableto5atnight.ThedoctortoldMr.Cousinsthattheydidnotknowhowtocure治疗hisproblemandhemightnever6theillness.Mr.Cousinshoweverrefusedtogiveuphope. Mr.Cousinsthoughtthattheillnesscouldbecausedby7thoughts.Hedidnotwanttotake8tocurehimself.Insteadhefeltthathappythoughtsorlaughtermightcurehisillness. Hebegantoexperimentonhimselfwhilestillinthehospitalbywatchingcomedyshowsontelevision.Mr.Cousinsquicklyfoundthattenminutesof9laughterduringthedaygavehimtwohoursofpain﹣freesleepatnight. Decidingthatthe10couldnothelphimMr.Cousinsleftthehospitalandcheckedintoahotelroomwherehecould11hisexperimentswithlaughter.ForeightdaysMr.Cousins12inthehotelroomwatchingcomedyshowsontelevisionreadingamusingbooksandsleepingwheneverhefelt13.WithinthreeweekshefeltwellenoughtotakeavacationtoPuertoRicowherehebeganrunningonthebeachfor14. AfterafewmonthsMr.Cousinswas15tocarryonhiswork.Hehadlaughedhimselfbacktohealth. 1A.laughed B.taught C.wrote D.copied 2A.magazines B.subjects C.photos D.ideas 3A.rich B.sick C.lonely D.famous 4A.stand B.realize C.face D.improve 5A.dream B.eat C.shout D.sleep 6A.gothrough B.lookafter C.getover D.findout 7A.unhappy B.pleasant C.silly D.clever 8A.food B.time C.medicine D.money 9A.unusual B.false C.real D.wild 10A.friends B.laughter C.experiment D.doctors 11A.begin B.end C.continue D.report 12A.rested B.worked C.studied D.played 13A.well B.tired C.afraid D.worried 14A.help B.exercise C.freedom D.fun 15A.able B.safe C.lazy D.uncertain
甲数的45%＝乙数的60%乙数是甲数的%．
Paynoattentiontothosewholaughatyou.Whatmostishowyouseeyourself. A.matters B.minds C.cares D.counts
不与56相邻的数是
FourHabitstoHelpYouSucceed Weallwanttosucceed.Forthosewhohavetriedandfailedsuccessseemsdifficulttounderstand.1. •Knowyourvalues. Findingyourvaluesisinlinewithcreatingmotivation.2Pickahandfulofthingsandwritethemdown.Remindyourselfofyourvalueseverydayandreflectonwhetheryouarehonoringthosevaluesthroughyourwork. •Pickagoalandfocusonit. Chooseonegoaltostartsomethinglargeenoughthatwillgiveyouasenseofachievementwhileadjustingwelltoyourvalues.Focusiskeyhere.3Ifyouperformmanytasksatatimeyoumightneverfinishyourprojectsbecausetheywilltakefartoolong. •Setatimeforsuccess. Setadateforsuccess.Knowwhenyouhopetorealizeyourgoal.4Bysettingatimelimityouaremakingtheprocessrealistic. •5. Failurecan'tbeavoidedwhenyoutakerisks.Byitsverydefinitionthedesiretosucceedmeansyouareriskingfailure.Manypeopletendtogiveupfartooearly.Don'tfallintothistrap!Usefailure.Treatitasagoodthingandgoon. A.Themorefocusedyouareononegoalthehigherchanceyouhaveofsuccess. B.Maketherightdecision. C.Ihavemadealistoffourhabitstohelpyousetgoalsandrealizethem. D.Don'tgiveupbecauseoffailure. E.Keepitrealisticwhilenotgivingyoutoomuchtime. F.Sitandreflectonwhatyouvaluemost. G.Pushyourselftobecourageousandtakethatnextstep.
计算小数除法时如果要求精确到0.01商应除到小数部分的
8角2分是1元的填分数写成小数是元．
Manypeoplethinkheroesneedtobehandsomerichorverysmart.Butasformeaheroisapersonwhoalwayshelpsothers. MyheroisUncleBill.Heistheeldestsonofaworkerandhegrewupinapoorfamilywithfouryoungerbrothersandtwolittlesisters.Hehadtogiveupschoolathisveryyoungage.Heworkedandgaveallhismoneytohisparents.Whenhewasgettingolderhefoundthathewasveryinterestedinfixingthings.Hecollectedbrokenthingswhichpeoplethrewawayandfixedthemintogoodones.Hecouldfixalmosteverythingthatdidnotwork.Heworkedhardandnevergaveup.Finallyheopenedhisownrepairshop.Ittookhimabout20yearstobecomeasuccessfulshopkeeper店主. Nowheisveryrichandhasfourothershops.Butheneverforgetsthedayswhenhehadnothing.Hegivesmoneytopoorfamilieshelpspoorkidsbuybooksandoffersthemfreelunches.Healsoencouragespeopletorecyclethings.HealwayssaysMakegooduseofwhatyouhavebecausewejusthaveoneearth.Hevolunteerstocleantheenvironmentinourneighborhood. 1WhatdoesUncleBill'sfatherdo? A.Heisashopkeeper. B.Heisaworker. C.Heisamathteacher. D.Heisafarmer. 2HowmanybrothersandsistersdoesUncleBillhave? A.7. B.6. C.5. D.4. 3WhydoesthewriterthinkUncleBillisahero? A.Heisrichandsmart. B.Heisasuccessfulshopkeeper. C.Healwaystrieshisbesttohelpothers. D.Heisgoodatfixingbrokenthings. 4WhichofthefollowingisTRUEaccordingtothepassage? A.UncleBillisnotgoodatfixingthings. B.UncleBillownsfiverepairshops. C.UncleBillforgetsthedayswhenhehadnothing. D.UncleBillcaresaboutnotpeoplebuttheenvironment. 5What'sthebesttitleforthispassage? A.UncleBill﹣MyHero B.ASuccessfulShopkeeper C.ProtectOurEarth. D.Let'sHelpEachOther.
解方程 χ﹣χ＝ 42＝χ．
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Themoreyousmiletheyouwillfeel. A.happily B.morehappily C.happy D.happier
一件西服打八折出售则现在售价与原价的比是
goodadvicetheteachergaveme! A.How B.What C.Whata D.Howa
6平方米＝平方分米．
要画一个周长是18.84厘米的圆用圆规的两脚在直尺上应量取多少厘米的距离
假如你叫李华你和你的家人去笔友David所在的城市新加坡Singapore旅游受到David的热情款待回来后你想对他表达自己的感谢之情.请根据以下要点给David写一封信. 1.感谢他的热情款待 2.在新加坡玩得很开心 3.新加坡的风景和美食令人印象深刻 4.邀请他来遵义旅游. 注意1.词数100词左右2.可适当增加细节以使行文连贯. DearDavid Yours LiHua
﹣﹣﹣Herfathertriedtothatnothingunusualhadhappened. ﹣﹣﹣Infactitwasnotserious. A.imagine B.pretend C.mean D.warn
方程一定是等式．判断对错
0.5既不是正数也不是负数而是小数．判断对错
某学校为了了解全校1600名学生到校上学的方式在全校随机抽取了若干名学生进行问卷调查问卷给出了五种上学方式供学生选择每人只能选一项且不能不选将调查得到的结果绘制成如图所示的条形统计图和扇形统计图均不完整． 1在这次调查中一共抽取了多少名学生 2补全条形统计图 3估计全校所有学生中有多少人乘坐公交车上学
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