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ChempracticeexamGeneralDescriptiveChemistryI UniversityofNorthCarolinaatChapelHill ScantoopenonStudocuStudocuisnotsponsoredorendorsedbyanycollegeoruniversityChempracticeexamGeneralDescriptiveChemistryI UniversityofNorthCarolinaatChapelHill ScantoopenonStudocuStudocuisnotsponsoredorendorsedbyanycollegeoruniversityDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com Name Last First ONYEN Instructor OBliemOCurtisODempseyOFostvedtExamClassroom GeneralDescriptiveChemistry101ExamIDONOTOPENORWRITEANYTHINGUNTILINSTRUCTEDTODOSOInstructions 1 WriteyournameandONYEN e g bliem above 2 WriteyourONYENatthetopofeachpage 3 Readeachquestioncarefully 4 Multiple choice many selectquestionscanbeansweredinpencil 5 Formany selectquestions mark x incheckboxes nostraymarks 6 Allotherquestionsmustbewritteninpen 7 SHOWYOURWORKwithcorrectunitsandsigfigs Partialcreditbasedonworkshown 8 Usetheperiodictable 9 Double checkyourcalculations 10 cid 0 ANSWERSMUSTBEPLACEDINTHEBOXESorLINES includingCORRECTUNITSandsigfigs 11 cid 0 Donotleaveanyanswersblank 12 cid 0 Readandsignthehonorpledgewhen andonlywhen youfinishtakingtheexam 13 cid 0 AspartoftheHonorCode youmaynotdiscusscontentsofthisexamwithpeersbeforenoon Wednesday 2 16 22 14 cid 0 Returnallpageswhenyoucompletetheexam 15 cid 0 Relax You vegotthis 101AtB cid 0 BqfUNzPN nbrhP cid 0 h cid 0 PxNUBv uCUNzPNsgwsugwIN cid 0 BsIhBUwsNzsgNkdotB cid 0 BqoBzNxbqNyNhIh cid 0 PBqPhIh cid 0 PH cid 0 wHsgBqhcNz wrrhrsw cid 0 yN B cid 0 sghr Nawlm ue u zB cid 0 Bs rhP cid 0 sgN cid 0 u wyS cid 0 BvUNzPN sgws uvwr cid 0 Bs gB cid 0 BqwxUN h cid 0 swSh cid 0 P sgN Nawl w cid 0 z H cid 0 zNqrsw cid 0 z sgws hs vhUU rhlCUb cid 0 Bs xN PqwzNz cid 0 BpHNrshB cid 0 r wrSNzm ihP cid 0 wsHqN Downloaded by Anonymous UNC Chapel Hill riawu06 gmail com 1mL 1cm31 10 10mc 2 998 108m sh 6 626 10 34J sE h 1mole 6 022x1023things1u 1 6606x10 24g1proton 1 0073u1Hz 1s 1 1 s1neutron 1 0087u E hc 2 2 wherehcRH 2 18x10 18J hmvEel Q1Q2d Downloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN MultipleChoice 4ptseach 1 Yourlabpartnerhandsyouapieceofaluminumfoil Whichoneofthefollowingisanextrinsicphysicalpropertyofthealuminum OA Itmeltsat660oCOB Itsdensityis2 7g cm3OC cid 0 Ithasamassof27gOD cid 0 Itslackofcorrosioninhumidconditions2 cid 0 Whichcolorlighthasthehighestfrequencyphotons OA redOB cid 0 yellowOC cid 0 blueOD alllighttravelsatthesamespeedandsohasthesamefrequency3 Thevolumeofagroundstatehydrogenatomis0 62 3 Whatisthisvolumeincm3 1 10 10mOA 6 2x10 37cm3OB cid 0 6 2x10 17cm3OC 6 2x10 5cm3OD 6 2x10 25cm34 JavierandJos bothmeasuredthediameterofapizzaadvertisedasan11 000 inchpiebyThePizzaPressonFranklinStreet TrialJavier sMeasurementsJos sMeasurements127 9cm288 8mm228 0cm280 0mm328 5cm269 4mmWhosemeasurementshavethegreaterprecision 1in 2 54cmexactlyOA JavierOB cid 0 Jos OC TheyareequallyuncertainOD CannotbedeterminedDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN 5 Potassiumiscomposedoftwonaturally occurringisotopes potassium 39andpotassium 41 Whatistheapproximatepercentabundanceofpotassium 41 OA 5 OB cid 0 25 OC cid 0 50 OD cid 0 75 OE 95 6 Usingtheplotbelow radialprobabilitydistributionasafunctionofdistancefromthenucleusfor1s and2s orbitalsonahydrogenatom decidewhichoneofthefollowingstatementsisfalse OA Therearetwomaximainthe2sfunctionbecauseoneelectronspendsmostofitstimeabout0 5 Angstroms fromthenucleuswhiletheotherelectronspendsmostofitstimeatadistanceofabout3 fromthenucleus OB Theaveragedistancefromthenucleusfora1selectronislessthanfora2selectron OC cid 0 Theradialprobabilitydistributionforthe3sorbitalinhydrogenwillhavetwonodes threemaxima anditslargestmaximumatadistancegreaterthan3 fromthenucleus OD cid 0 Inthe2sorbital themaximumaround0 5Angstroms calledpenetrationofthe1sorbital indicatesthata2selectronhasafiniteprobabilityofbeingfoundasclosetothenucleusasa1selectron RadialdistributionfunctionDistance Downloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN ThisPageisIntentionallyBlankDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN 7 Howmanycarbonatomsarein5 91gramsoftrimethylamine CH3 3N OA cid 0 0 100OB cid 0 0 300OC 6 02x1022OD 1 81x10238 4ptseach Considerthefollowinglistoforbitalswhenansweringthenexttwoquestions i cid 0 2sii 2pxiii cid 0 2pyiv 2pzv cid 0 3sI cid 0 Whichorbitalsaredegenerateinahydrogenatom OA cid 0 AlloftheseorbitalsaredegenerateinahydrogenatomOB cid 0 2sand3sOC cid 0 2s 2px 2py 2pzOD cid 0 2px 2py 2pzOE cid 0 NoorbitalsaredegenerateinahydrogenatomOF NoneoftheseorbitalsexistinahydrogenatomII cid 0 Whichorbitalsaredegenerateinacalciumatom OA cid 0 AlloftheseorbitalsaredegenerateinacalciumatomOB cid 0 2sand3sOC cid 0 2s 2px 2py 2pzOD cid 0 2px 2py 2pzOE cid 0 NoorbitalsaredegenerateinacalciumatomDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN ShortAnswerPartI9 2ptseach Consideragroundstatetinatom Sn Z 50 atom Howmanyelectronshave AnswerA n 5 B n 4andl 1 C l 0andml 0 D n 2andl 2andml 0 E ms 1 2 10 cid 0 3ptseach SupposethreebeamsofradiationAB Cbelowarefocusedonametallicsurface ThebeamrepresentedbytheAwavescauseselectronstobeemittedfromthesurface Decidewhethereachofthefollowingstatementsistrue I Inorderofincreasingfrequency B A CA True B FalseII cid 0 TheBwavemayormaynotproduceelectrons buttheCwavesurelywill A True B FalseIII cid 0 BoththeBandCwavesshouldproduceelectronsifthesourcesofthewavesarebright intense enough A True B FalseABCDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN 11 cid 0 6pts Mercury Hg isaliquidatroomtemperature DrawHgasasolidandasagastodepictdifferencesbetweenthestates SolidLiquidGas12 cid 0 12pts Thefollowingarepropertiesoftwoelementalionsandonepolyatomicionthatareessentialinourdiet Foreachsample determinethenumberofprotons neutrons andelectronsandwritethesymbolforeachion e g X n A cid 0 Magnesium 24withachargeof 2B cid 0 Atomicnumber34 massnumber80 chargeof 2C 31P16O43 protons electrons neutronssymbolABC31P16O43 ShortAnswerPartIII Provideyouranswerstoeachpartofthefollowingquestionswithintheboxprovided Besuretoshowallworkwithunitstobeeligibletoreceivepartialcredit 13 cid 0 6pts Whatisthemassofasinglemoleculeofamoxicillin acommonantibioticwithchemicalformulaC16H19N3O5S Provideyouranswerinu atomicmassunits andingrams notg mol Reporteachanswerwithfoursignificantfiguresinscientificnotation ugDownloaded by Anonymous UNC Chapel Hill riawu06 gmail com ONYEN 14 cid 0 ASpaceXrocketthatlaunchedaU S satellitein2015isnowonacollisioncoursewiththeEarth smoon ItwillhitthemooninMarch 2022


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