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Whichisalistofelementsinorderof reasingmetalliccharacter?

Si,P,S

As,P.N

Sr,Ca,Mg

Br,Se,As

Na,Ne,F

Theelectronconfigurationoftheoxideionismostsimilartotheelectronconfigurationofthe

Sulfideion

Nitrideion

Oxygenatom

Nitrogenatom

Fluorineatom

Thevalueof nk’sconst 6.63*10-34J*s.Thevelocityoflightis

3.0*108m*s-1.Whichvalueisclosesttothewavelengthinnanometersofaquantumoflightwithfrequencyof8*1015sec-1?

3*107

4*101

5*10-18

2*10-25

E.1*10-25

Whatisthenumberofhalf-filledorbitalsinanatomofchromium?

0

2

4

6

12

Whatisthenumberofelectronsinanatomofscandiumthathaveanl

quantumnumberof1?

1

3

4

6

12

TheelectronconfigurationofatomsofelementXisshownbelow[Ar]4s23d10

Whichisthemostlikelyformulaforthecompoundofthiselementandoxygen?

XO

X2O

XO2

X2O3

X2O5

Whichlistsspecieswiththesameelectronconfiguration?

Mg,Ca,Sr

Mg2+,Ca2+,Sr2+

S2-,Cl-,K+

Fe,Co,Ni

F-,S2-,As3-

Oneatomicmassunit(amu)isclosesttothemassof

Oneproton

Oneelectron

Theoxygen-16nucleus

Thecarbon-12nucleus

6.02*1023atomsofhydrogen

Allofthesemolecularshapescanbeexinedbydsp3hybridizationofelectronsonthecentralatomEXCEPT

Linear

T-shape

See-saw

Octahedral

Trigonalbipyramidal

WhichspecieshasaLewisdotdiagramthatdoesnotillustratetheoctetrule?

3

NO-

NH3

4

NH+

N2

NO2

Whichsubstancehasthegreatestioniccharacter?

Cl2O

NCl3

PbCl2

BaCl2

Ch2Cl2

3

TheshapeoftheIO-ionisbestdescribedas

see-saw

T-shaped

Tetrahedral

Trigonalner

Trigonalpyramidal

PibondingisfoundinallofthefollowingEXCEPT:

N2

SCN-

CO32-

AsH3

C(graphite)

Whatisthenumberofsp3hybridorbitalsassociatedwiththehydroniumion,H3O+?

none

two

three

four

six

Whichchangereasesthemean pathofmoleculesinasampleofgas?

A.reaseinpressureatconstanttemperature

B.reaseindensityatconstanttemperature

C.reaseintemperatureatconstantpressure

D.reaseintemperatureatconstantvolume

E.reaseinpressureatconstantvolume

Whichoccurswhenasubstanceisconvertedfromliquidtogasatthenormalboilingpoint?

Potentialenergyofthesystem reases.

Thedistanc weenmolecules reases.

Theaveragek icenergyofthemolecules reases.

A.Ionly

IIonly

IandIIonly

IIandIIIonly

I,II,andIII

Thelatticepointsofacrystalofhydrogeniodide,HI,areoccupiedby

HImolecules

HatomsandIatoms

H+cationsandI-anions

H2I+cationsandI-anions

H2moleculesandI2molecules

Whichelementformsanoxidethatisamolecularsolid?

sodium

argon

carbon

silver

iron

WhatisthefinalconcentrationofCl-ionwhen250mLof0.20MCaCl2solutionismixedwith250mLof0.40MKClsolution?(Assumeadditivevolumes.)

0.10M

0.20M

0.30M

0.40M

0.60M

Whatvolumeofwatershouldbeaddedto0.40Lof6.0MH2SO4solutiontoproduceasolutionthatis2.0MH2SO4?

0.40L

0.80L

1.2L

1.6L

2.4L

Whatisthepercentmethanolbymassinasolutionthatcontains20gramsofmethanol,CH3OH,in30gramsofwater?

20%

33%

40%

60%

67%

Comparedtowater,a0.20MsolutionofNaClwillhaveallofthefollowingpropertie CEPT:

greaterdensity

lowervaporpressure

lowerboilingpoint

lower zingpoint

greaterosmoticpressure

Inaspontaneous,exothermicdissolvingprocess,whichofthesevalueshasanegativesign?

/\Gsoln

/\Hsoln

T

Ionly

IIIonly

IandIIonly

IIandIIIonly

I,II,andIII

WhichoftheseGroup2oxideshasthegreatestpercentbymassoxygen?

bariumoxide

berylliumoxide

calciumoxide

magnesiumoxide

strontiumoxide

Whichoxidesofmanganese,Mn,havepercentbymassofmanganesethatisgreaterthan50%.

MnO

MnO2

Mn2O2

IIonly

IIIonly

IandIIIonly

IIandIIIonly

I,II,andIII

Whichsamplecontainsthegreatestnumberofnitrogenatoms?(AllmeasurementstakenatSTP.)

0.20molN2O4(g)

0.40molN2(g)

40.LNO2(g)

40.gNH3(g)

80.gN2O4(g)

Al3++3e >Al0

Inthehalf-reactionshownabove,the3e-represents

3*96,500electrons

3*(6.02*1023)electrons

3*(6.02*1023)coulombs

3/27*96,500electrons

3/27*(6.02*1023)electrons

AllofthefollowingapplytothereactionA(g)+B(g) >C(g)asitis

carriedoutatconstanttemperatureinarigidcontainerEXCEPT:

Thetotalpressuredecreases

Therateofreactiondecreases

Theentropyofthesystemdecreases

ThenumberofmoleculesofCdecreases

ThefrequencyofcollisionsbetweenmoleculeAandBdecreases

Rate=k[A]2[B]

Atthebeginningof rialofthisreaction,[A]=4.0and[B]=1.0.Theobservedratewas0.048molC*L-1*sec-1

Thevalueoftherateconstantforthisreactionisclosestto

3*102

4*100

8*10-1

D.1*10-2

E.3*10-3

Whichisthelabelfortherateconstant?

mol2*L-2*sec-1

L*mol-2*sec-1

L2*mol-2*sec-1

L2*sec*mol-1

L2*sec*mol-2

AllofthefollowingdecreasetherateofagasphasereationEXCEPT

addinginertgas

removingthecatalyst

reasingthevolume

loweringthetemperature

decreasingtheconcentrationofoneofthereactants

3

Rate=k[Br-][BrO-][H+]2

Theoverallorderforthisreactionis

2

3

4

6

12

ThepHofa0.010Msolutionofaweakacidis4.0.Whatisthevaluefortheionizationconstant,Ka,forthisacid?

10-2

10-4

10-6

10-8

10-10

TheKspforPbCl2is1.6*10–5.WhiaximumamountofNaCl(s)maybeaddedto1.0Lof0.010Pb(NO3)2solutionwithoutcausingprecipitatetooccur?

1.6*10-5mol

3.2*10-5mol

1.6*10-3mol

3.2*10-3mol

1.6*10-2mol

2O3(g)<===>3O2(g)Kp=2.5*1012

Considerasystematequilibriumbasedonthereactionabove.Insuchasystem,theconcentrationofO2(g)is

constantandequaltotheconcentrationofO3(g)

constantandlessthantheconcentrationofO3(g)

constantandgreaterthantheconcentrationofO3(g)

reasingandtheconcentrationofO3(g)isreasing

reasingandtheconcentrationofO3(g)isdecreasing

Themolarheatoffusion,/\Hfus,forwateris6.01kJ/mol.Whichexpressiongivesthemolarentropyoffusion,/\Sfus,inkJ/K*molforiceatitsnormalmeltingpoint?

6.01/273

6.01/298

6.01*4.18

6.01*273

6.01*298

AllofthefollowingreactionsillustrateanreaseinentropyEXCEPT:

N2O4(g) >2NO2(g)

C6H6(l) >C6H6(g)

2KClO3(s) >3O2(g)+2KCl(s)

3Fe(s)+2O2(g) >Fe3O4(s)

C2H5OH(l)+3O2(g) >2CO2(g)+3H2O(g)

Fortheburningofpropane

C3H8(g)+5O2(g) >3CO2(g)+4H2O(g)

whichofthefollowingistrueatanytemperature?

/\G<0

/\S>0

/\H<0

Ionly

IIIonly

IandIIonly

IIandIIIonly

I,II,andIII

Whichisapolyproticacidinwater?

Ca(NO3)2

Na2HPO4

H3AsO4

Ionly

IIIonly

IIandIIIonly

IandIIonly

I,II,andIII

Whensolidpotassiumhydrideisdissolvedinwater,whichofthefollowingisthestrongestbaseintheresultingsolution?

H+

K+

2

O-

KH

OH-

WhichrangeludesthepHthatresultswhen0.10moleNaOHisaddedto100mLof1.0MHClsolution?

between1and4

between4and6.5

between6.5and7.5

between7.5and10

between10and14

Whichrange ludesthepHthatresultswhen0.10moleofNaOHisaddedto100mLof1.0MH2SO4solution?

between1and4

between4and6.5

between6.5and7.5

between7.5and10

between10and14

AlCl3+Cl >AlCl4-

Whichdescriptionappliestothereactionabove?

amphotorism

anionhydrolysis

Arrheniusneutralization

Lewisacid-basereaction

Bronsted-Loweryprotontransfer

Questions44-45:Balancethefollowingequationusingtheelectrontransfermethod.Youmaywishtoassignoxidationnumbersandwritethe

electronicequationsforoxidationandreductiontohelpbalancetheoverallreaction.

HNO3+ P+ H2O> H3PO4+ NO

Whatisthesumofthecoefficientsinthisbalancedequation?

5

8

10

12

18

Whatistheoxidizingagentinthisequation?

P

H+

H2O

OH-

HNO3

Whichisthebestdescriptionofonefaraday?

8.31joules

96,500amperes

onecoulomb/volt

onejoule/coulomb

6.02*1023electrons

H2O+Br2>HOBr+HBr

Whichisthebestdescriptionofthebehaviorofbromineinthereactionabove?

oxidized,only

protondonor

protonacceptor

bothoxidizedandreduced

neitheroxidizednorreduced

Whichorganiccompoundisanelectrolyte?

C2H6

CH3Cl

HCOOH

CH3OH

C6H12O6

Inthecompletecombustionofbutane,theproductsare

wa ndcarbon

butanoneandwater

butanoicacidandwater

carbondioxideandwater

carbondioxideandhydroge