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2. computer certification

CHEM%1212K%
Final%Exam%
Summer%2011%
1.%%At%a%particular%temperature,%Kc%=%2.5%x%1010%for%the%reaction%%
2SO2(g)%+%O2(g)% %%2SO3(g)%%
%
What%is%Kc%for%the%reaction%SO3(g)% %%SO2(g)%+%½%O2(g)%
%
%
A)%4.0%x%10J11%
%
B)%1.6%%x%10J21%
%
C)%6.3%x%10J6%
%
D%6.3%x%1020%%
%
E)1.6%x%105%
%
%
2.%%The%value%of%K%at%308%K%is%6.5x104%for%the%reaction%of%NO(g)%with%chlorine%gas%to%
form%NOCl(g).%%If%PNO%=%%0.35%bar%and%PNOCl%%=%0.10%bar%at%equilibrium,%then%what%is%the%
equilibrium%partial%pressure%of%the%chlorine%gas?%
%
%
A)%2.3%x%105%
%
B)%4.3%x%10J6%
%
C)%1.9%x%103%
%
D)%5.4%x%10J4%
%
E)%1.3%x%10J6%
%
%
3%%Which%statement%is%true?%
%
%
A)%All%reaction%quotients%are%equilibrium%constants.%
%
B)%If%K%>%Q,%then%the%reaction%must%shift%to%the%reactants%(left)%to%reJattain%%
%
%
%%%%%%equilibrium.%
%
C)%If%Q%<%K,%then%the%reaction%is%nonspontaneous.%
%
D)%Not%all%equilibrium%constants%are%reaction%quotients.%
%
E)%If%Q%>%K,%the%reaction%must%proceed%in%a%direction%to%reduce%the%amount%of%% %
%
%%%%%%products%present%or%increase%the%amount%of%reactants.%
%
%
4.%%Which%species%is%least%likely%to%be%completely%deprotonated%in%aqueous%solution?%
%
%
A)%HNO3%
%
B)%%HF%
%
C)%HCl%
%
D)%HBr%
%
E)%HClO4%
%
%
%
%
%
Form%A%
1%
CHEM%1212K%
Final%Exam%
Summer%2011%
5.%%What%is%the%expression%for%the%reaction%quotient%for%the%reaction:%
%
%4NO2(g)%+%O2(g)% %2N2O5(s)%
%
2
(PN 2 O 5 )
%
A)%%% Q =
%%
(PNO 2 ) 4 (PO 2 )
%
(PN 2 O 5 )
%
B)% Q =
%
4
(P
)
(P
)
NO
O
2
2
€
%
%
C)% Q = (PNO 2 ) 4 (PO 2 ) %
%€
1
%
D)% Q =
%
(PN 2 O 5 ) 2
€
%
1
%
E)% Q =
%
(PNO 2 ) 4 (PO 2 )
€
%
%
6.%%Which%statement%is%true?%
%€
%
A)%NH3%is%a%BronstedJLowry%base%because%it%is%a%proton%donor.%
%
B)%The%bromide%ion%is%a%Lewis%base,%but%not%a%BronstedJLowry%base.%
%
C)%Water%can%be%a%BronstedJLowry%acid%AND%a%Lewis%base,%depending%on%
%
conditions.%
%
D)%Metal%cations%tend%to%be%Lewis%acids%due%to%their%ability%to%donate%electron%%%
%
%%%%%%pairs.%
%
E)%HSO4J%is%neither%an%acid%nor%a%base%under%any%theory.%
%
%
%
7.%%At%425oC,%K%=%4.18%x%10J9%for%the%reaction%2HBr(g)% %H2(g)%+%Br2(g).%%If%0.20%bar%of%
HBr(g),%and%0.010%bar%of%both%H2(g)%and%Br2(g)%are%introduced%into%a%container,%then%
which%expression%best%represents%the%equilibrium%pressure%of%HBr?%
%
%
A)%0.20%–%x%
%
B)%0.20%–%2x%
%
C)%0.20%+%x%
%
D)%0.20%+%2x%
%
E)%0.010%+%x%
%
%
%
%
Form%A%
2%
CHEM%1212K%
Final%Exam%
Summer%2011%
%
8.%%What%is%the%conjugate%base%of%HPO42J%?%
%
%
A)%PO43J%
%
B)%H3PO4%
%
C)%H2PO4J%
%
%
D)%HPO4%
%
E)%H2PO4%
%
%
%
9.%%What%is%the%pH%of%a%0.0147%M%solution%of%KOH%at%room%temperature?%
%
%
A)%1.83%
%
B)%12.17%
%
C)%13.98%
%
D)%12.47%
%
E)%1.53%
%
%
%
10.%Which%base%is%weakest?.
.
.
A)%BrO4J%
%
B)%BrO3J%
C)%IO4J%
D)%BrOJ%
E)%IOJ%
%
%
12.%%Which%statement%regarding%a%solution%of%0.0100%M%NaNO2%is%true?%
%
%
A)%The%pH%of%the%solution%is%acid%because%HNO2%is%a%weak%acid%that%%
%%
%
%%%%%%undergoes%acid%hydrolysis%to%produce%H3O+%in%solution.%
%
B)%The%pH%of%the%solution%is%neutral%because%it%was%made%from%a%strong%base%
%
%%%%%and%a%weak%acid.%
%
C)%The%pH%of%the%solution%is%basic%because%NaOH%is%a%strong%base%that%% %%
%
%%%%%undergoes%base%hydrolysis%to%produce%OHJ%in%solution.%
%
D)%The%pH%of%the%solution%is%acidic%because%the%conjugate%acid%of%NaOH%%%%
%
undergoes%acid%hydrolysis%to%produce%H3O+%in%solution.%
%
E)%The%pH%of%the%solution%is%basic%because%the%conjugate%base%of%HNO2%% %
%
%%%%%%undergoes%base%hydrolysis%to%produce%OHJ%in%solution.%
%
%
Form%A%
%%%
%
%%
%%%%%
%
3%
CHEM%1212K%
Final%Exam%
Summer%2011%
13.% 100%mL%of%each%of%the%following%solutions%is%mixed.%%Which%one%of%the%mixed%
solutions%is%a%buffer?%%
A)% 1.0%M%CH3NH2(aq)%+%0.6%M%KOH(aq)%%
B)% 1.0%M%CH3NH3Cl(aq)%+%1.0%M%KOH(aq)%%
C)% 1.0%M%CH3NH2(%(aq)%+%0.8%M%HNO3(aq)%%
D)% 1.0%M%NH4Cl(aq)%+%0.8%M%HCl(aq)%%
E)% 2.0%M%CH3NH2(%(aq)%+%2.2%M%HNO3aq)%%
%
%
%
14.%%A%100.0%mL%sample%of%0.0200%M%propanoic%acid%(monoprotic,%Ka%=%1.3%x%10J5)%is%
titrated%with%0.100%M%NaOH.%%What%is%the%pH%of%the%system%once%1.00%mL%of%NaOH%
have%been%added?%
%
%
A)%1.70%
%
B)%3.61%
%
C)%7.00%
%
D)%4.89%
%
E)%10.7%
%
%
%
15.% Which%statement%regarding%the%reaction%of%HCN%with%NH3%is%true?%
%
A)%NH3%is%the%proton%donor.%
B)%The%N%of%HCN%is%the%electron%pair%donor.%
C)%A%coordinate%covalent%bond%is%broken.%
D)%A%coordinate%covalent%bond%is%formed.%
E)%None%of%these%statements%is%true.%
%
%
%
16.%%What%concentration%of%HNO2%is%required%to%produce%a%solution%whose%pH%is%1.26?%%
The%Ka%for%HNO2%is%7.2%x%10J4%
%
%
A)%4.25%M%
%
B)%9.75%M%
%
C)%1.16%M%
%
D)%0.055%M%
%
E)%3.96%M.
%
%
%
%
%
%
Form%A%
4%
CHEM%1212K%
Final%Exam%
Summer%2011%
17.%%Identify%the%most%likely%analyte%and%titrant%(listed%in%that%order)%based%on%the%
curve%below.%!
%
%
%
%
%
%
%
A)%NaOH,%HCl% %
%
%
%
%
B)%HBr,%LiOH% %
%
%
%
%%
%
C)%H2SO4,%KOH%
%
D)%Ba(OH)2,%HNO3%
%
E)%CH3COOH,%NaOH%
%
%
%
18.%%What%is%the%pH%of%a%buffer%composed%of%0.50%M%CH3COOH%and%0.50%M%NaCH3COO%
after%0.020%mol%of%HCl%has%been%added%to%1.0%L%of%the%buffer%solution?%%Assume%no%
change%in%volume.%%The%Ka%of%CH3COOH%is%1.8%x%10J5%and%the%Kb%of%NaOH%is%108.%
%
%
A)%3.56%
%
B)%4.71%
%
C)%4.74%
%
D)%6.44%
%
E)%4.78%
%
!
19.%%What%is%the%oxidation%state%for%Mn%in%Ca(MnO4)2?%
%
%
A)%+8%
%
B)%+7%
%
C)%+6%
%
D)%+2%
%
E)%0%
%
%
%
Form%A%
5%
CHEM%1212K%
Final%Exam%
Summer%2011%
%
20.%%The%molar%solubility%of%PbI2%in%water%at%25oC%is%0.0015.%%What%is%the%Ksp%for%PbI2%
at%that%temperature?%
%
%
A)%3.6%x%10J8%
%
B)%3.4%x%10J9%
%
C)%6.8%x%10J9%
%
D)1.4%x%10J8%
%
E)0.29%
%
%
%
21.%What%effect%(and%why)%does%the%addition%of%Na2CO3%have%on%the%solubility%of%
ZnCO3?%
%
%
%
A)%The%solubility%increases%due%to%complex%ion%formation.%
%
B)%The%solubility%decreases%due%to%complex%ion%formation.%
%
C)%The%solubility%decreases%due%to%the%common%ion%effect.%
%
D)%The%solubility%increases%due%to%the%common%ion%effect.%
%
E)%The%solubility%increases%as%a%result%of%both%the%common%ion%effect%and%%
%
%
%%%%%complex%ion%formation.%
%
%
%
%
Use%the%unbalanced%oxidationJreduction%reaction%to%answer%questions%22J23.%
%
Cr2O72J(aq)%+%Zn(s)%%%Zn2+(aq)%+%Cr3+(aq)%
%
22.%%What%is%the%oxidizing%agent?%
%
%
A)%Zn(s)%
%
B)%Cr2O72J(aq)%
%
C)%Zn2+(aq)%
%
D)%Cr3+(aq)%
%
E)%There%is%no%reducing%agent.%
%
%
23.%%What%is%the%sum%of%the%coefficients%when%the%reaction%is%balanced%in%acid?%
%
%
A)%4%
%
B)%5%
%
C)%18%
%
D)%30%
%
E)%64%
%
Form%A%
6%
CHEM%1212K%
Final%Exam%
Summer%2011%
%
24.%%Which%answer%option%correlates%the%values%of%Gibbs%free%energy,%cell%potential,%
and%the%equilibrium%constant%for%a%galvanic%cell?%
%
%
%
%
%
Gibbs!free!energy! !
K!
!
Eocell!
%
A)%%%%% %
+%
%
%
>%1%% %%%%%%%%%%%%%%%%J%
%
B)%%
%
+%
%
%
<%1% %
%%+%
%
C)%%
%
J%
%
%
>%1% %
%%+%
%
D)%%
%
J%
J%
%
%
<%1%
%
%%+%
%
E)%%
%
%
%
>1%
%
%%J%
%
%
%
25.%%Calculate%the%value%of%the%equilibrium%constant%(T%=%298%K)%
%
%
Pb(s)%+%2Ag+(aq)%%%Pb2+(aq)%+%Ag(s)%
Eocell%=%+0.93%V%
%
%
A)%J1.8%x%105%
%
B)%1.3%x%1031%
%
C)%7.7%%x%1030%
%
D)%1.5%x%1031%
%
E)%2.9%x%1031%
%
%
26.%%Which%statement%regarding%the%galvanic%cell%represented%by%the%line%notation%
below%is%true?%
Pt!H2(g)!H+(aq)%|| Cl (aq)!AgCl(s)!Ag(s)%
%
%
A)%Anions%must%flow%into%the%anode%to%maintain%charge%balance.%
%
B)%Platinum%is%an%inert%electrode%in%both%halfJcells.%
%
C)%Solid%silver%metal%is%produced%at%the%anode.%
%
D)%Electrons%flow%from%the%cathode%to%the%anode.%
%
E)%The%standard%hydrogen%electrode%(SHE)%is%the%cathode%
%
%
27.%The%rate%constant%for%the%decomposition%of%cyclobutane%(C4H8)%at%1000oC%is%%
87%M01sJ1.%%If%the%initial%concentration%of%cyclobutane%is%2.00%M,%what%percent%of%it%
decomposes%in%0.010%seconds?%
%
%
A)%8.0%%
%
B)%64%%
%
C)%42%%
%
D)%36.%%
%
E)%20.%%
−
Form%A%
7%
CHEM%1212K%
Final%Exam%
Summer%2011%
%
%
%
28.%%Determine%the%rate%law%from%the%data%given.%
Experiment!
Initial![NO]!
Initial![O2]!
Initial!rate!(M/s)!
1%
0.0110%
0.0130%
0.00321%
2%
0.0220%
0.0130%
0.00640%
3%
0.0110%
0.0260%
0.0128%
4%
0.0330%
0.0130%
0.00960%
5%
0.0110%
0.0360%
0.0288%
%
%
A)%rate%=%k[O2][NO]%
%
B)%rate%=%k[O2]2[NO]%
%
C)%rate%=%k[O2]%
%
D)%rate%=%k[O2][NO]2%
%
E)%rate%=%k[NO]%
%
%
29.%%%A%galvanic%cell%was%constructed%using%the%Zn2+/Zn%and%H2/H+%(standard%
hydrogen%electrode)%halfJcells%under%the%following%conditions.%%What%is%Ecell%%at%%
298%K%?%
%
%
Zn2+(aq)%+%2eJ%%%Zn(s)%
%
Eo%=%J0.76%V%
+
J
%
2H %+%2e %%%H2%
%
%
Eo%=%0.00%V%
%
[Zn2+]%=%0.010%M%
%
[H+]%=%2.5%M%
%
PH2%=%0.30%atm%
%
%
A)%0.86%V%
%
B)%0.76%V%
%
C)%0.53%V%
%
D)%0.31%V%
%
E)%1.21%
%
%
30.%How%many%hours%are%required%to%plate%25.00%g%of%nickel%metal%from%1.00%M%
NiSO4(aq),%using%a%current%of%3.00%C/s?%
%
%
A)%7.6%h%
%
%
B)%3.8%h%
%
C)%8.3%h%
%
D)%2.6%h%
%
E)%255%h%
%
Form%A%
8%
CHEM%1212K%
Final%Exam%
Summer%2011%
31.%%If%the%rate%constant%for%a%given%reaction%is%33%MJ1sJ1%at%298%K%and%45%MJ1sJ1%at%675%
K,%then%what%is%the%activation%energy%for%the%reaction?%
%
%
A)%1.4%kJ/mol%
%
B)%140%kJ/mol%
%
C)%J1.4%kJ/mol%
%
D)%3.9%kJ/mol%
%
E)%There%is%not%enough%information%to%determine%the%activation%energy.%
%
32.%%A%main%group%element%should%always%have:%
% %
% A)%partially%filled%d%orbitals.%
% B)%its%last%valence%electron%filling%an%s%or%p%orbital.%
% C)%properties%of%a%nonJmetal.%
% D)%a%large%ionization%energy.%
% E)%a%large%electronegativity.%
%
33.%%Which%structure%is%a%feasible%transition%state%for%the%single%step%(elementary)%
reaction%O%+%H2O%%%2OH%?%
%
%
A)%%
%
%
%
%
B)%
%
%
%
%%%
%
%
%
%
%
D)%
%
%
%
%
%
C)%%
%
%
E)%
%
Form%A%
9%
CHEM%1212K%
Final%Exam%
Summer%2011%
34.%%What%characteristic%is%most%influential%in%characterizing%a%hydride%as%saline%or%
metallic?%
%
% A)%electron%affinity%
% B)%ionization%energy%
% C)%atomic%radius%
% D)%electronegativity%
% E)%ionic%radius%
%
%
35.%%Elements%of%which%group%are%likely%to%form%3Jcenter,%2Jelectron%bonds?%%
%
%
%
A)%Group%I%
%
B)%Group%II%
%
C)%Group%III%
%
D)%Group%V%
%
F)%Group%VI%
%
%
Use%the%following%mechanism%to%answer%questions%36%and%37.%
%
1)%ClOJ%(aq)%+%H2O(l)% %HClO(aq)%+%OHJ(aq)%
%
(fast)%
%
2)%IJ(aq)%+%HClO(aq)% %HIO(aq)%+%ClJ(aq)% %
%
(slow)%
J
J
%
3)%OH (aq)%+%HIO(aq)% %H2O(l)%+%IO (aq)% %
%
(fast)%
%
36.%%Identify%the%intermediates.%
%
%
A)%ClOJ,%HIO,%H2O%
%
B)%HClO,%H2O%,OHJ,%HIO%
%
C)%ClOJ,%IJ,%IOJ,%ClJ%
%
D)%IJ,%IOJ%
%
E)%HClO,%OHJ,%HIO%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
Form%A%
10%
CHEM%1212K%
Final%Exam%
Summer%2011%
37.%%Which%reaction%progress%diagram%most%accurately%portrays%the%mechanism?%
%
A)%
%
%
%
%
%
%
D)%
%
B)%%%%
%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%
C)%%%%%%%%%
%
%
%
E)%None%of%these%
%%%%%%%%%%%%%
%
%
%
%
38.%%How%do%alkali%and%alkaline%earth%metals%(except%Be)%react%in%water?%%Assume%that%
each%answer%option%lists%all%products.%
%
%
A)%They%produce%hydrogen%gas%and%hydroxide%ions.%
%
B)%They%produce%water%and%hydroxide%ions.%
%
C)%They%produce%protons%and%water.%
%
D)%They%produce%Lewis%acids%(metal%cations)%hydroxide%ions.%
%
E)%They%do%not%react%with%water.%
%
%
%
%
%
%
%
Form%A%
11%
CHEM%1212K%
Final%Exam%
Summer%2011%
39.%%Which%are%logical%products%for%the%reaction%of%4LiH%+%%AlCl3?%
%
%
A)%3LiCl%+%LiAlH4%
%
B)%LiAlH4%+%LiCl%
%
C)%3LiClH%+%AlH%
D)%LiHCl%+%AlCl3%
%
%
E)%They%do%not%react.%
%
%
40.%%Which%statement%about%the%coordination%complex%below%is%true.%
%
%
%
%
%
%
%
%
%
%
A)%The%oxidation%state%for%the%Co%is%0.%
B)%The%coordination%number%for%the%complex%is%four.%
C)%The%complex%is%chiral.%
D)%The%complex%has%a%geometric%isomer.%
E)%The%complex%rotates%the%plane%of%polarized%light.%
41.%%Which%statement%regarding%[Fe(OH)6]4J%is%true?%
%
A)%It%is%diamagnetic.%
%
B)%Its%electron%configuration%is%t2g6.%
%
C)%If%the%ligands%were%replaced%with%NH3,%the%configuration%would%be%t2g4eg2.%
%
D)%Both%B%and%C%are%true.%
%
E)%It%is%highJspin.%
%
%
42.%%The%coordination%complexes%below%exhibit%what%type%of%isomerism?%
%
[CrCl(NH3)5]Br%and%[CrBr(NH3)5]Cl%
%
%
A)%coordination%
%
B)%linkage%
%
C)%ionization%
%
D)%hydration%
%
E)%geostereoisomerism%
Form%A%
12%
CHEM%1212K%
Final%Exam%
Summer%2011%
43.%%What%happens%to%the%5%degenerate%d%orbitals%when%the%nickel(II)%cation%forms%
the%complex%[Ni(NH3)6]2+?%
%
%
A)%The%orbitals%spit%so%that%there%are%three%d%orbitals%with%higher%energy%than%%%
%
%%%%%%the%other%two.%
%
B)%The%orbitals%split%so%that%there%are%two%%orbitals%with%higher%energy%than%% %
%
%%%%%%the%other%three.%
%
C)%The%five%orbitals%remain%degenerate%but%have%a%higher%energy%than%before%% %
%
%%%%%complex%formation.%
%
D)%The%five%orbitals%remain%degenerate%but%have%a%lower%energy%than%before%% %
%
%%%%%%complex%formation.%
%
E)%None%of%the%above.%
%
%
%
44.%%What%is%the%coordination%number%for%Pd%in%the%complex%[Pd(en)2)]Cl2?%
%
%
%%%%%%%%%%%%%%%%
%%%%%%%%%%en%
%%%%%%%%%%%%%%%%%%%
%
%%%%%%%%%%%%%%%%%%%%%%%%%% %
%
%
%
%
A)%1%
%
B)%2% %
%
%
C)%4%
%
D)%6%
%
E)%8%
%
46.%%Which%ion%is%least%likely%to%exist?%
%
%
A)%V3+%
%
B)%Mn7+%
%
C)%Co9+%
%
D)%Cu2+%
%
E)%Cr6%
%
47.%%How%many%unpaired%electrons%would%you%expect%for%the%central%metal%to%have%in%
the%complex%[Fe(CN)6]4J%?%
%
%
A)%4%
%
B)%5%
%
C)%2%
%
D)%1%
%
E)%0%
%
%
Form%A%
13%
CHEM%1212K%
Final%Exam%
Summer%2011%
48.%%Which%oxides%are%(or%can%be)%basic?%
%
%
%
%
I.%%%Na2O%
%
%
II.%%SO3%
%
%
III.%Al2O3%
%
%
IV.%P2O5%
%
%
A)%I%and%III%
%
B)%I%only%
%
C)%II%and%IV%
%
D)%II%and%III%
%
E)%II,%III,%and%IV%
%
%
49.%%Which%statement%is%false?%
%
%
%
A)%Co%has%a%greater%atomic%radius%than%Rh.%
%
B)%Cr6+%has%a%smaller%ionic%radius%than%Cr3+%
% C)%Co2+%has%a%smaller%atomic%radius%than%Fe2+.%
% D)%Zn%has%a%smaller%atomic%radius%than%Ni.%
% E)%Ru%and%Os%have%almost%the%same%atomic%radii.%
%
%
50.%%Which%statement%regarding%the%noble%gases%is%false?%
%
%
%
A)%All%members%of%the%group%have%complete%octets.%
%
B)%All%members%of%the%group%occur%in%the%atmosphere%are%monatomic%gases.%
%
C)%Fluorine%is%the%most%electronegative%of%the%noble%gases.%
%
D)%There%are%no%known%compounds%containing%noble%gases.%
%
E)%None%of%these%statements%are%false.%
%
%
%
Form%A%
14%
CHEM%1212K%
Final%Exam%
Summer%2011%
51.%%Which%of%these%molecules%is%chiral?%
%
%%%%%%%%%%%%%%I.%
%
%
%
%
%
%
%
%
%%%%%%%%%%%%%%%II.%
%
%
%%%%%%%%III.%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
%
A)%I%only%
B)%II%only%
C)%III%only%
D)%I%and%II%
E)%II%and%III%
Form%A%
15%
CHEM%1212K%
Final%Exam%
Summer%2011%
52.%%Doping%germanium%with%which%element%results%an%nJtype%semiconductor?%
%
%
A)%arsenic%
%
B)%gallium%
%
C)%carbon%
%
D)%tin%
%
E)%oxygen%
!
53.%%Which%statement%regarding%molecular%orbital%theory%is%false?%
%
%
A)%Constructive%interference%leads%to%a%bonding%molecular%orbital%that%is%
%
always%lower%in%energy%than%the%constituent%atomic%orbitals.%
%
B)%Destructive%interference%leads%to%an%antibonding%molecular%orbital%that%is%
%
always%higher%in%energy%than%the%constituent%atomic%orbitals.%
%
C)%A%linear%combination%of%N%atomic%orbitals%results%in%N%molecular%orbitals.%
%
D)%Degenerate%molecular%orbitals%have%different%energies.%
%
E)%Molecular%orbitals%are%filled%according%to%the%Aufbau%principle%to%give%the%
%
molecular%electronic%configuration.%
%
%
54.%%For%molecular%orbital%theory%regarding%bulk%solids,%which%of%the%following%
statements%is%true?%
%
%
A)%The%molecular%orbitals%are%close%enough%in%energy%that%a%band%forms%
%
rather%than%discrete%orbitals.%
%
B)%The%distance%between%the%bands%is%called%the%energy%gap.%
%
C)%The%lower%energy%band%is%called%the%conduction%band.%%
%
D)%A%small%band%gap%results%in%a%material%being%an%insulator.%
%
E)%Conductors%do%not%have%a%valence%band.%
!
55.%%Which%of%the%following%theories%of%bonding%best%explains%conductivity%in%metals?%
%
A) Molecular%orbital%theory%
B) Valence%bond%theory%
C) VSEPR%
D) Electronegativity%
E) Band%gap%theory%
%
Form%A%
16%