CHEM 219 EXAM 1 ALL QUESTIONS WITH COMPLETE VERIFIED SOLUTION.

CHEM 219 EXAM 1 ALL QUESTIONS WITH m m m m m m




COMPLETE SOLUTION.
m m




On aa aof ascratch apaper, awrite aout athe aLewis aDot aDiagram afor aeach aof athe aindicated
m m m m m m m m m m m m m m m




aelements aand adetermine athe afollowing afor aeach:
m m m m m m m




a) aThe anumber aof aLone aPairs athe aatom apossesses ain aits avalence ashell.b) aThe
m m m m m m m m m m m m m




anumber aof aUnpaired aElectrons athe aatom apossesses ain aits avalence ashell.c) aThe
m m m m m m m m m m m m




anumber aof abonds athe aatom awill aform.
m m m m m m m




Oxygen
Carbon
Hydrogen
Nitrogen a- aCorrect a aAnswer a- aOxygen a- aa) a2 ab) a2 ac) a2
m m m m m m m m m m m m m




Carbon a- aa) a0 ab) a4 ac) a4 m m m m m m m




Hydrogen- aa) a0 ab) a1 ac) a1 m m m m m m




Nitrogen a- aa) a1 ab) a3 ac) a3 m m m m m m m




Classify athe abonding abetween athe agiven apairs aof aatoms aas aionic, acovalent, aor apolar
m m m m m m m m m m m m m




acovalent. aUse athe atable aof aelectronegativities ashown abelow ato ahelp awith athe
m m m m m m m m m m m m




aclassification.
m




a. aBr aand aBr
m m m




b. aK aand aCl
m m m




c. aP aand aCl
m m m




d. aC aand aO
m m m




e. aNa aand aBr a- aCorrect a aAnswer a- aa. aBr-Br: aElectronegativity adifference a() a= a0 a=
m m m m m m m m m m m m m m m m




aCOVALENT a(or apure acovalent)
m m m m




b. aK-Cl: a() a= a2.2 a= aIONIC
m m m m m m




c. aP-Cl: a()= a0.9 a= aPOLAR aCOVALENT
m m m m m m




d. aC-O: a()= a1.0 a= aPOLAR aCOVALENT
m m m m m m




e. aNa-Br: a() a= a1.8 a= aPOLAR aCOVALENT
m m m m m m m




Define athe aterm aconstitutional aisomer. a- aCorrect a aAnswer a- aTwo a(or amore) adifferent
m m m m m m m m m m m m m




achemical acompounds awith athe asame amolecular aformula abut adifferent aconnectivity
m m m m m m m m m m




abetween athe aatoms ain atheir astructural aformulae.
m m m m m m m




Explain a(using aspecific aevidence) awhat amakes athe afollowing atwo acompounds
m m m m m m m m m




aconstitutional aisomers aof aone aanother: a- aCorrect a aAnswer a- aBoth acompounds ahave
m m m m m m m m m m m m m




aa aMF aof aC3H6O a- asame aMF.
m m m m m m m




Compound a"a" ahas aa a3-carbon achain awith aa aC=O ain athe amiddle. aNo aH aatom
m m m m m m m m m m m m m m




aconnected ato aC aof aC=O.
m m m m m

, Compound a"b" ahas aa a3-carbon achain awith aa aC=O aat athe aend. aThere ais aan aH
m m m m m m m m m m m m m m m




aattached ato athe aC aof athe aC=O.
m m m m m m m




What ais athe arelationship abetween athe acompounds ashown? aAre athey athe asame
m m m m m m m m m m m




acompound, aconstitutional aisomers, aor atwo adifferent acompounds athat aare anot arelated
m m m m m m m m m m m




ato aone aanother? aExplain. a- aCorrect a aAnswer a- aDifferent acompounds athat aare anot
m m m m m m m m m m m m m m




arelated. aThey ahave adifferent aMF a- a(a) aC3H8O, a(b) aC3H6O.
m m m m m m m m m m




Identify aeach aof athe afollowing acarbon askeletons aas alinear a(continuous), abranched, aor
m m m m m m m m m m m




acyclic. a- aCorrect a aAnswer a- aa) aBranched a
m m m m m m m m m




b) aLinear a(continuous)
m m




c) aCyclic
m




On aa apiece aof ascratch apaper, awrite aout astructural aformulae afor aall aof athe
m m m m m m m m m m m m m




aconstitutional aisomers apossible afor athe aMF aC3H6F2. aHow amany aisomers aare
m m m m m m m m m m m




apossible afor athis aformula? a- aCorrect a aAnswer a- a4
m m m m m m m m m m




Characterize aeach aof athe afollowing astructural aformula arepresentations aas aeither aa
m m m m m m m m m m




adash, acondensed, asuper-condensed, aor abond-line aformula: a- aCorrect a aAnswer a- aa)
m m m m m m m m m m m m




aSuper-Condensed
m




b) aCondensed
m




c) aBond-line
m




d) aDash
m




Write athe amolecular aformula afor aeach aof athe acompounds awhose abond-line aformulae
m m m m m m m m m m m




aare agiven abelow. a- aCorrect a aAnswer a- aa) aC5H10
m m m m m m m m m m




b) aC3H8O
m




c) aC4H10O
m




Which abond-line aformula ashown abelow arepresents aa aconstitutional aisomer aof
m m m m m m m m m




aCH3CH2CH2CH2CH3? a- aCorrect a aAnswer a- a(b)
m m m m m m m




Which aof athe afollowing astructures adoes aNOT ahave athe amolecular aformula aC6H14? a-
m m m m m m m m m m m m




aCorrect a aAnswer a- a(d)
m m m m m




The astructural aformula:
m m




Has awhat amolecular aformula? a- aCorrect a aAnswer a- a(c) aC7H14
m m m m m m m m m m




The acompound acarbon amonoxide ahas athe afollowing astructural aformula:
m m m m m m m m




What ais athe aformal acharge aon athe acarbon aand athe aoxygen? aShow ayour acalculation.
m m m m m m m m m m m m m




aWhat ais athe aoverall acharge aon athe amolecule? a- aCorrect a aAnswer a- aCarbon a= a4-
m m m m m m m m m m m m m m m m




(2+3) a= a-1 m m




Oxygen a= a6-(2+3) a= a+1 m m m m




Overall a= aFC aCarbon a+ aFC aOxygen a= a[-1 a+ a(+1)] a= a0
m m m m m m m m m m m m




For athe afollowing aexample aof aresonance:
m m m m m