Test 2 Form A with Answer Key - Chemistry for Engineers | CHEM 1465, Exams of Chemistry

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Yana Sammue| Chemistry 1465 Last Name Fitst Name Test 2 Chapters 5-8 Mareh 25, 2009 Anewer Savage ve ey IA VIIA H He sor tA A IVA VA Via vial Le 8 4 5 6 7 6 9 10 Li | Be B|/CiN|Oj] F INe 94 | 9,01 10,81 | 12,04 | 414.01 |15.999/18.998/ 20.18 Na| Mc ALSi| P| S| Chl aA a i 22.99 at 1G VB VB VIB VIB IIB 1B IIB | zeosles.coal sor | sata s846 | cons 19 20 22 23 28 30 34 82 33 84 35 36 kK |Cal Sc Ti} V Cr |Mn| Fe | Co Ni Cu] Zn | Ga| Ge] As | Se] Br | Kr 89.10 | 40.08 | 44.96 | 47.00 | 50.94 |51.996| 54.94 | 55.85 | 58.98 | 58,70 | 63.55 | 65.88 | 69.72 | 72.59 [74.92 | 78.96 | 79,90 | 83.80 Ab| Sr. Y | Zr |Nb| Mo] Te|Bu Bh|Pa]Ag| Gd) in| Sn/Sb| te! 1 | Xe 85.47 | 87.62 | 88.91 | 91.22 | 92.91 | 95.94 |_(98)_ 1101.07}102.91] 106.4 |107.87)| 112.41] 114.821118.69/121.751127,60|126,90] 151.59} 55 65 182. 24/187 aes 83) 188.91; 178.49; 180, 480. 24 ig 186,24] 190.2 |192,22|195.09|196,97 an 204.37] 207.2 [208.98] (209) | (210) | (222) 3B. Cs|Ba| La] Hf| Ta} W | Re} Os} Ir | Pt | Au Fr Ra Ac [Ung UnpUnh (228) {226.03/227.03| (261) (263) ee | 8 OO] a ae ae ary ee 7 ] 68 [6 [70 [7 Ce| Pr|Nd|/Pm/Sm Eu | Gdj Tb Dy Ho] Er Tm! Yb] Lu 140.12] 140,94|144 24] (145) | 150.4 [151,96 157.251158,99} 164.98] 167.26|168.95| 173.04/174.97| 90 of 92 93 4 95 96 7 og Too | 1oT Os | 10S Th! Pa! U |No|Pu|Am/Cm| Bk Ct Es |Fm| Md! No; Lr (292.04)251 04/258 03]287,05| (244) | (249) | (247) | (247) | (254) | (252) | (257) | (258) | (259) | (260) Instructions: 1. This exam consists of 25 questions. 2. Noseraich paper is.allowed. You may do the work in the test margins and on the backs of the test pages. 3. Mark the answers you choose on the test itself for your own information and also on the standard answer sheet you provided. Scoring will be based on the answer sheet, 4, When you finish, turn in both the test form and the answer form, The test form and your personal report will be returned to you at the next class. Write your name on both forms. Write the test version (A, B, C, ete.) on the top of the answer form. ‘ R= 0.08206 Laten/Kmol = 8.314 /Kmol C= 3.000 x 10° m/seo h= 6.626 x 10™ Jesec Ey =-2,18 x 10" J for hydrogen atom 1. A sample container of carbon monoxide occupies a volume of 435 mL at a pressure of 785 torr and a temperature of 298 K, What would its temperature be if the volume were changed to 265 ml. at a pressure of ” oI (4354) (785) 21 (624)( 248) CATR K Bb ve wage meles C387 (.2659¢ 785 = (.01836) (624 CT) D, 489 K Ta lesK EB. 538K PVenRT R= 0.0621 atm Bm G24 tore 2. A sample of propane, a component of LP gas, has a volume of 35,3 L at 315 K and 922 torr. What is its volume at STP? A282 (35.3 Cazatorr) = (nd( 62.4) (316) B. 30.61 ne 16656 Cosi? (V)(7e0 teen) = (6556) Coast) (278) “492.1, ya 37] L 3. Dr. LMA, Brightguy adds 0.1727 g of an unknown gas to a 125-mL flask. If Dr. B finds the pressure to be 736 toxr at 20,0°C, is the gas likely to be methane, CH, nitrogen, N,, oxygen, O,, neon, Ne, or argon, Ar? -{T27 A. CH, (125 LC 786) = Car) Ce CD py B.N, Chay = 16 C.Ne MU = 34.3 olmel Ng. © 28 O, = 32 CaP e738 Ac 2 4o 4. Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (Pyro, = 24 torr at 25°C) 5.000091 g Po, = Proter ~ Pixs MWg, > 32 31g = 742 2H C.0.0962.2 D. 0.0993 g fo, 3 TN8 tore E, 0.962 g (0.0783 L) (78 fore ) -(%)( @2-4)(248) $= &0 Ble iA 4A 13. Which of the following elements has the largest atomic size? we Remember Penedte “Trends ‘a C ch Atomre size? Tiereasing Dovenwards and & the Left ro E, Ra 14. Identify the element of Period 2 which has the following successive ionization energies, in kJ/mol, JE,, 1314 IB, 3389 1E,, $298 TR, 7471 TE, 10992 TByy 13329 1, 71345 TR, 84087 Eliminate A, Bi: hi and Bde not have more than Bem : : twit) © ancl 7 O ie Aikely because of the huge difference in TE ben A. B. COD This ie due fo the. incrediple. amour of energy needed te D. BE, Li B Ne reak, + orbit None of these choices Pesnefe™ 15, Elements with first ionization energies and electron affinities generally form anions, Anions draw electrons and are herd fo remove A. low, very negative B. high, positive or slightly negative electrons from . Finances EN Remember peredte ends for rt Temahn E, None of these is genorally correct. Energy and — Electmne zt) ahvity 16, Select the compound with the highest lattice energy. BoBwon) D Factors dictate — lattice enersy * C. Nal(s) DLiBr(s) ) Higher charge =7 pfeater JaHtee. nergy CEMBDO) 2.) émaller atomic radius ay geeke battee energy 5A 17. Arrange aluminum, nitrogen, phosphoras and indium in order of increasing electronegativity. A. Al<In<N<P B. Al<In<P<N Periodic trends ©.m<Al<P<N D.In<P<Al<N H. None of these orders is correct. 18. Select the correct Lewis structure for NOCI, a reactive material used as an ionizing solvent. a. b. c af og ae + ood - an oF oe ++ tO—N-—Cli O=N—Cl :O—N=Cl =N=C| fae “ .* ** oe ” o Valent 2 Bret? = 19 € = Aga Aloc| st bets ~ snail CTE a eter terns, €” she C.c a cere ate Dd LB ch: me o . -Om~ Am CH =N-Oh: E. None of these choices is correct. © AS -t ad / he Qanner: Or Central atom double pando w] 0 te fll ocho 19. What is the molecular shape of SCI,F as predicted by the VSEPR theory? 61a +7 = 3 A, linear S Cle F ~ B. bent a Ey saw : + D. T-shaped \ lecule cometries E. tigonal pyramidal cl = F my fur welecular geometri ! Be pairings of central ater et ve S$€@ Sau 20. What is the hybridization of Ar in ArF, as predicted by VSEPR theory? Ac sp St (yt) = 36 B, sp? Ac Fa UF C, sp* 6 bends = 6 hybridechors D. spd nog L hybriekia ort 3 P ° 3 hy bod marten, \ Fs a? 2 hybridrmaton oh 21, Ammonia’'s unusually high melting point is the result of . dipole-dipole forces. \ Hi q Bowen oventon forces Greater intermebecukr forces increases melting | besling penis “Co igarogen bonding. D. covalent bonding. u a bond ~- E, ionic bonding. swt no nydre yen bor —Lntermo leew ag, fos useless) HO 1+) hydrogen bonding H SN 2) dim ple — dipole. 3) henden dispersten 22. The strongest intermolecular interactions between hydrogen sulfide (H,S) molecules atise from <A Yipole-<ipote forces. U.S hes no Hydrogen bonding Cenly H with Nv, PD B. London dispersion forces. 2 C, hydrogen bonding. D. ion-dipole interactions. E. disulfide finkages, 23. Iron crystallizes in the body-centered cubic lattice. What is the coordination number for Fe? te ator cr of atoms jamediately adjacer+ atom A.4 Coordingtwary Numbet * CoE Sime te eure Cg,0..) ae ody — Biz Pedycentedl (bc ce 8 SS, dese-paked 2 ID 24. Nylon is formed by addition polymerization Memorize from Leche Cp >condensation polymerization C. block polymerization D. graft polymerization B, isotactic polymerization 25. The strong ABS plastic used in computer cases Is a tra high molecular weight linear polymer B. alternating copolymer . C. block copolymer Memorize Gom Leclore. D, graft copolymer E. type of HDPE polymer