Test 3 This year form A

Test 3 This year form A - Third Test Signature ix.) DJ 'JI...

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Unformatted text preview: Third Test Signature ix.) DJ 'JI Chemistry 1035 FORM A October 31. 200? ' I promise that 1 will abide by the Virginia Tech Honor Code while taking this test. Printed Name What is the best description of the bonding in methanol. C HgOH‘? metallic bonding ionic bonding covalent bonding both ionic and cowlent bonding LUJIQr-n‘ A metal has the Lewis dot symbol M:, and a non-meta] is What is the chemical formula for the ionic compound formed from these two elements? 1. M3X3 2. Mng 3. Mng 4. M5X3 Which of the following metals will have the lowest melting point? 1. K 2. Ca 3. Cs 4. Ba Which one ofthe following statements regarding an exothermic chemical reaction is Lot correct? 1. The energy level ofthe products is less than the energy level ofthe reactants. 2. The energy required to break reactant bonds is greater than the energy released when product bonds are formed. 3. The value ofttHrm is negative. 4. All of these statements are correct. 5. None of these statements is correct. Which of the following bonds has the highest bond energy“? 1. C=S 2. C=Te 3. C-S 4. C—Te ll. Which of the tollowing substances is a liquid at room temperature and pressure? 1. Ca 2. KC] 3. N3 4. (Ch In which of the following types of bonding do we have dclocalized electrons? metallic bonding in Cu ionic bonding in CuCl; covalent bonding in Cl; none of these all of these U142»thfo— Which of the following elements has the highest electronegativity? l. C 2-. Si 3. Ne 4. Ar Which of the following changes is(are) endothermic? H30(solid) —> HgOUiquid) CaC03(s) + heat —> 030(3) + C03(g) ' Both of these changes are endothermic. Neither of these changes is endothermic. JEDJMH What is Al—Im for the reaction 2 Hg(g) + 02(g) ——> 2 Hgogg)? l. AHrm = w506 kl 2. AHrxn = +506 kl 3. AHrm = +858 kl 4. ABM = —858 kl ' Which of the following hoods is most nolar‘? ‘t-p 1' 1. w ' .3. Be-F 3. C-F 4. NF Which of the following ionic compounds will have the highest lattice energy? I. MgO 2. MaS 3. Meet 4. Mass u t— -— t... — 1e; [8. 19. Which ofthe following statements about C 03 is correct. 1. The bonds are polar and the molecule is polar. 2. The bonds are nonpolar. but the molecule is polar. 3. The bonds are polar. but the molecule is nonpolar. 4 The bonds are nonpolar and the molecule is nonpolar. Which of the following molecules is polar? A CHEF; B Chi C OF; D SFG 1 A only ’2. C only 3. Both A and C 4. A, B. and C 5. All four are polar. What is thc formal chargc on the sulfur in the Lewis structure shown below? .Q—tS—Qi 1. 0 2. -1 3. +1 4. +’? 5.. -9 Which of the following molecules'has a Lewis structure with only single bonds between the atoms? 1. CS; 2. CHgClg 3. HCN 4. C2H4 Which of the ibllowing molecules has a Lewis structure with three lone pairs of electrons on the central atom? 1. Big 2; 01:3 3. NF; 4. Xng 5. noncofthese Which of the following molecules or ions has an odd number of electrons? l. 2. ClgO 3. N303 4. NO! 5. none Ofll’iCSE What is the formal charge on the boron in the ion BI 14'? 1. +1 2. -1 [JJ +3 4. -3 5. zero 20. How many resonance structures are there for the carbonate” ion- C 03""? 1. l 2. 2 3. 3 4. 4 21. What is the bond order in the nitrite ion- N01“? 1. 1 :2. 1133 3. 11/2 4. 1'28 5 2 22. Which ofthe following. molecules is(are) tetrahedral in shape? 1. SF4 2. Ken 3. CF4 4. All three are tetrahedral. 23 Which 9E of the following molecules cannot exist? 1. OF: 2. OF4 3. SF; 4. 81:6 24. Which of the following molecules is(are) linear? ' 1. OF: 2. SO: 3. Bel-lg ' 4. All three are linear. 25. What is the shape of the compound 1173.? trigonal planar trigonal pyramidal T-shaped trigonal bipyramidal J's—LaJlib-v-t 26. What is the approximate bond angle for the sulfite ion. SO32"? l. 90” 2. 109.50 3. 1200 4. 180a Which of the following molecules has the largest bond angles"? 1. 01:1 2. Which $801 Nil; (31:4 ofthe following molecules will a have Lewis structure with fewer than eight electrons around the central atom? 1. 2. 3. 4 BC13 13ng Elli—13 All of these What are the bond angles in the aeetonitrile molecule CH3—CEN ‘3' ll H—Cf—CEN: H 1. 109.50 and 1800 2. 1200 and lSOFJ 3. 109.50 and 12C!0 4. 109.50. 1200. and 18WI What is the hybridization for the central atom in X6134? l. 5p .3 2. Sp“ 3. so3 I 4. dsp3 5. In a molecule of ethylene. C2H4. both carbon atoms exhibit Sp2 hybridization. Which one of the following statements is correct? 1 . [\J L») There is a double bond between the carbon atoms- and the bond angles are 109.5”. There is a double bond between the carbon atoms. and the bond angles are 120”. There is a single. bond between the carbon atoms. and the bond angles _ are 109.50. There is a triple bond between the carbon atoms. and the bond angles are 180”. ' Marv-nun 1 ! LIX??? Lihlum mafia-n 3 at Ll Be 6.94! 9317.2 sudlurn monamm 11 12 Na Mg 21mm 24305 poulslrrn l calciln scat-um manhunt madiun 19 211 21 22 23 Ca . war-1m I'lllflplfikfll .mm mm: an:th 24 25 32 33 34 35 Ge As Se Br 5!: 74.92: 73.95 ram-I quium pnlld'um '. ' ' 1.0131 Iridium 4s 4s Rh - Pd 106.42 . Wm; . - - var . 6 Bond Energy Bond Energy Bond Energy Bond Energy nds 11-41: 432 N—H 391 51-“1‘1 313 3"}? 34'? H—F 365 N—N 1.60 51—31 216 8—3 266 H—C! 42? N—P 209 Si—O 368 S—F 327 rl-LBr 363 14—0 201 83—8 226 S—C] 271 11—1 295 N- --F 212 Sit—F 565 S—Br 118 N—Cl 200 31—431 381 5-4 WJTO (3—1-1 413 N—Br 2-53 Sl—Br 310 C—C 34'? Nw-I 159 Si-I 234 F_—F 159 Cn—Si 301 F—CE i93 C—N 305 OFF-I 467‘ P—H 310 F—BT 212 C—0 358 O—P 35l P-Si 313 F'-1 263 C--P 264 0—0 204 P—P 20E) Cl—Cl 243 CBS 259 0—3 265 P—F 49L] C]—-HT 215 C—F 4-53! 0*]: 191} P—C] 331 C1---I 108 C—‘C': 339 O—Cl 203 P—Br 272 r—Br 193 . Cr-Br 2'15 O—Br 234 P-—I 184 Br—-1 ' 115 C—1 Elé 0—1 234 1—1 151 Bands C=C 614 N=N 418 339 NEN 945 C==N 61:3 33:0 607 891 ("=0 745 O; 498 ] 0'10 {79911113031 -57‘"": L I'll“! Number-hf l Notation | Number nfqlu Shape of | 130116 ‘15-. the E Hybridizatign structural A= central . lune pairs ' molecule or angles. ' mulccule forth: I units around l amm X= on central I inn dcgrcL-s polar Hall CC1llTfi1 atom cuntral atom peripheral atorr. . ‘ X‘s are the : atoms . same? , E=lone ' ' Pair; . “I __ _ z . _ . _ _. ___ !. ' ‘ .7 sax; " 0. _ - "Linear..- _' 1&9. _____?5:2 _ -_ 5.? f 3 1 AK, {1 triangular 12C» ; No - l _ p1ztztar _ h ' i : 3 AX3E ] bentI angular —-'.20 i Yes tsp: ' - <]2‘ - _ TI | 0- tetrahedral ' mp: ‘ _.\'o “I _S£: _ i -‘. l triangular 409.5 ‘ Yes ‘ 5p" ' l prrarnédal "-1095 __ ‘___ _l 2 bent: anguéar - ]09.5 1 Yes sp" _ : ; 499-5 l _ l I ' _ 5 AX: I I3 1 triangular 90 WE): 180 ‘\-'c ‘ r1533" ‘1 __ I | bipvra-rniria] __ _ _ l _ l L l__ FOL-E l 'e _ seesqf I 90.12_E_5_,H_180 i _ 1:5: ’ __ | 5 _ _ : AXEEE 2 T-shapeg GU. 180 _J' _ Yes ; i l AXZEJ 3 ' linear _ 139 _ : No i _ 6 i “AXS . G octahedral _. an 130_ A No 6 m r‘txfi'r': _ 1 square I 90 180 " Yes A _ i pwamidql__ _ __~__ . ;_ 5 _ AXqu l 2 . square planar a '90,]80 ; N0_ | ...
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Test 3 This year form A - Third Test Signature ix.) DJ 'JI...

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