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01403111(1/54)

1. H C2H4(g)+Cl2 CH2ClCH2Cl (g) C-H (413 KJ/mol), C-C (347 KJ/mol), C=C (620 KJ/mol), Cl-Cl (239 KJ/mol), C-Cl (339 KJ/mol)

H rxn = [4D(C-H)+D(C=C)+D(Cl-Cl)] ­ [4D(C-H)+2D(C-Cl)+D(C-C)] = [(4*413)+620+239] ­ [(4*413)+(2*339)+347] KJ/mol = -167 KJ/mol ( ) 2. 1) 20Ca

2) 50Sn

3) 10Ne

4) 53I

3. ( ) - - 1) OF2 2) FNO 3) COCl2 4) OCS 5)CH2Cl2 6) BrO3 7) PO43 1) OF2 = 6+(7*2) = 20 e2) FNO = 7+5+6 = 18 e-

3) COCl2 = 4+6+(7*2)= 24 e-

4) OCS = 6+4+6 = 16 e-

5) CH2Cl2 = 4+2+(7*2) = 20 e-

5) BrO3- = 7+(6*3)+1 = 26 e

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6) PO43- = 5+(6*4)+3 = 32 e-

4. - - - 1) SO3 2) NO3 3) N2O 4) OCN 5) N3 SO3

3 NO3-

3 N2O (I) (II) OCN (II) (III) N3 (I)

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5. - 1) BeCl2 2) SO2 3) SF6 4) ICl5 5)NO3 7) OCl2 8)BF3 9)NF4+ BeCl2 : Be () 4 ()

6) AlCl3

SF6 : S () 12 ()

ICl5: I () 12 ()

AlCl3: Al () 6 ()

BF3 : B () 6 ()

6. AXmEn VSEPR NF3 AX3E

109.5

4

PCl6

-

AX6

90

NO2+

AX2

180

SbCl52

-

AX5E

90

XeF4

AX4E2

90

XeO3

AX3E

109.5

FNO

AX2E

120

7. MO AO

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8. N2+ F2 a) b) c) d) e) f) N2+ a) N = 1s2 2s2 2p3 , N+ = 1s2 2s2 2p2

-

b)

c) N2+ = (2s)2(*2s)2(2py2pz)4 (2px)1 d) = (7-2)/2 = 2.5 e) 1 (2px) 2 2py2 2pz2 (2s)2 (*2s)2 f) ()

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F 2a) F = 1s2 2s2 2p5 , F- = 1s2 2s2 2p6 b)

c) F2- = (2s)2(*2s)2(2px)2(2py2pz)4 (*2py*2pz)4 (*2px)1 d) = (8-7)/2 = 0.5 e) 1 (2px) (2s)2 (*2s)2, (2py2pz)4 (*2py*2pz)4 (2px)2 (2px)1 f) () 8. 1) O H2O 1) O = 1s2 2s2 2p4 2) N NH3 3) C CH4 4) N N2 5) C CH3Cl

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2) N = 1s2 2s2 2p3

3) C = 1s2 2s2 2p2

4) N = 1s2 2s2 2p3

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5) C = 1s2 2s2 2p2

9. 1) (electrostatic attraction) (delocalised electrons) ( EN ) Li, Mg, Na, Al, Cu, Fe, Mn 2) () (allowed band) (forbidden band) () Lin 3) 3 1. dipole-dipole CH3OH CHCl3 2. dipole-induced dipole C3H6O C6H14 3. London (dispersion) C8H18 C6H14

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4)

EN F O N H2O H2O; H2O HF/HCl/HBr; NH3 NH3; NH3 H2O

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