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Unformatted text preview: 1. 6. Atom}: ' \5 swig This is form A/ ofExam 2 from 31309. All other forms are scrambled versions of this form. Which is best described as a covalent compound? a. b. c. d. 015 flue. 0.17 "54:3 5m“ we“ ”11¢qu- Bflmosj 2 5g ”- NbCls COBYE :f ; ér' 50K ”Nine/33$ wixfimér J7 a/adhflfln’rwé IBr a! ” {0 fig, d“! M” The ionic compound formed from lithium ion and the chromate ion (CrOf‘j is: “El. 69 c. d. E. norm Li + . + C .. .4: (0,, 112ch #9 ‘F m; - algge o merogg €34 20H) 5‘, Z gut/M ugmogz £qu microgg Which of the following anions has a —3 charge? G? b. c. d. E. nitride ion ”3* ... ”3" ”2%! 4M9 #1 3 carbonate ion c0; ”BL; Mgr #1252? ”(Mar Cyanide ion an)" 3 alga-k”! 1’9 AL aandb all of the above liacéfimfé u/ ”C ’ Which of the following salts is not soluble in water? a. b. C. d. How manv valence electrons are available for the Lewis structure of SeOE? M m CsCl CuCl2 lead (H) nitrate calcium acetate copper (H) sulfide #9 Ia/L W ‘é/é “I ;¥;2 fd/WC (it Wgzfli) 1: ,4» :3 6 4' 2(6) $/9¢ 22 . - '3 '3 The valence shell electron configuration for an element is ns“np“. How manv covalent bonds to hvdrogen atoms would be formed bv this element? 1 firth-Ia Jedi?” ' J cg) calm! 2 I 3 x c a ér" z, 4 H «W9 9 /_< 22529 5 7‘ 10. 11. 12. Which violates the octet rule? a. b. C. d. . 5F and M! m ovfifv’i’wj sulfur hexafluoride 5F; ‘ {OJ-4‘ 99H rule, PC1— ."J BC]; 3"!) I; M W’yého M {-2.55} aandb a/m’tv?ofl 6. all of the above Indium would be expected to form ionic compounds where the charge on the indium ion is: a. 69 c. d. E. _-2 I", z} 1317wa 3/? M1 {#3 km“ ‘1 1"; wf/I' /95¢ 3 e. #45 14/13 a. “*3 I‘M. —5 What is the oxidation number of chlorine in the chlorite ion, (1102—? _1 w “0 “’M I» ”OM ,3 ——1 £602. 17 rem”; *2. a 4. 25.2):— .../ m cm. a»; it; ml 3. QLMKS‘f‘y"; allcfkflgnwddtye- The bicarbonate ion is also called the hvdrogen carbonate ion. Which formula is correct for this ion? “El. (9 c. d. 6. HCO; Hco; {ea Jul/6 3.5 in 1%, Jed“ chof MA W [W #016: AM choj- Hcof- #5: If: a... [again-I22 ,5» My“... m mob! 45 indwo As the elements of Period 2 are considered from left to riUht, there is an increase in a. b. C. d. W M 4. 1‘ ionization energy: hugged/#7 W A! Kym 4's!" 0‘ «5 If? electronegativitv. l #0}! J aandb 4““, L; {We all of the above number of valence electrons. M912 M Which is the correct formula for ammonium chloride? C I} “M (Nugget. > fo/ya, 4 4"” 4 NHfil— #5:} 7066 M (We! NH3C1‘ 4% £4010” # MM we: den/7a! 13. 14. 16. 18. H was The Lewis structure of the nitrate ion contains one double bond and two single bonds, but W experimental measurements show that all nitrogen—oxygen bonds are identical in length and strength. What concept best explains this observation? ¢ can 1m“) will a. Law of Definite Proportions __ 1 GD Resonance ‘9 (WIS {99 t c. Electronegativity 0 fl”: 0 3 way; d. Periodic Properties :3 f? ’0 e. Hund’s Rule 0 ... ”:0 (—av 0*16—‘0 M gxflmo Which element is likely to he X in the molecule shown here? [559)?” $1095 'O'=l\l—'X": .23 e; in {41:04:91 a B )I _ 0 m 6: :s 2 ”71%.." a. an! Wm M" Q Br X Matt/a; 7e; -=‘> 5.19;,” A”; 2 1.4.1 “1 law-c Predict the product of the reaction of aluminum with oxygen. What is its formula weight? a. 43 ngol { 4' g 1). 7’0 ngol '> #1: 4r 02..., m7 A12r03 dz?) 56") ”9/0!” c. 7’5 ngol @ 102 ngol f 4 e. 204 ngol We? 3” “5) fl! 3 J 9”,»! A” 2- 10}! fl l§¢£ Which group of elements usually forms sulfides with the general formula X28? W M 3. *3 C? :3 Meat; 5"” /‘ c1951 0/! X MI} c. 3A AL +[ d. 4A e. none ofthe above 39 )0ng Which could describe an ionic compound? a. It is a solid at room temperature and has a relatively high melting point. 1). A solution of the compound conducts electricity when it is dissolved in water. c. The formula of the compound includes metal and nonmetal elements. ‘1: > all of the above a . «dih‘ ”WC £5. womb-7t e. none of the above Which of the following molecules has it : 0? p a. Pl-L " F ’ F s . 1). spam fl—P*il F 7f<fi . (3&0- IJV 4" I'd/“(#Z’é") c. (“.0 ,5 at #17 Auk 54:; $6!!! d. all are nonpolar 17””‘7 Mele/ é a]]' 1. arepoar hfimr/‘I. age: 4- so; “4; undo, Consider the following eq ation for questions 19 - 20. You will need to balance the equation! 19. 20. 21. 22. 23. 24. *1 KC] +£3.02 —» Koo. How many moles of oxygen gas will be needed to react with 3.0 moles of KCl? “El. b. C. 69 E. 2.0 mol oxygen gas 3.0 mol oxygen gas (Kama), £0!(:»:;:: 3 9.5-“ 0;, 4.0 mol oxygen gas 4.5 mol oxygen gas at“ 9.0 mol oxygen gas I' 1'14" #9" ’61— UMC‘! 01", 7” ‘ In the reaction shown in #19, the change in oxidation number for oxygen (from left to right) is: “El. b. 9 d. E. 0to +1 0 to —1 02" “‘47 156103 0 to —2 J a 6“"! __2 to “3 e/mf m a. envy) —2 to --6 W9 @ What is the correct name for Sng? “El. b. e. d. sulfur difluoride I. fog/2,. WMIWJO a'l’fiit ”Haiti sulfur (H) fluoride * £9393“? I’M l; 52:]- fl!!! gfldfi, 5r” I? strontium (H) fluoride ,t 1;" A! k! . Zfl ,” g, Jr”: a N strontium difluoride I 7 P ( m; ,4”, M“ 44m Me A») strontium fluoride Which of the following is the correct electron configuration for the chloride ion? (9 b. c. d. E. Ionic bonds result from W “El. 1s22s22pr‘3s23pf‘ 19¢, (Ii 1s22s22pr‘3s23p8 gm, flag/rd a Jan [304$] 19:. ,gz252¢£3f%f 1522522}? 10¢. 741M 1s22s22pf‘3s23p5 We, 1 9' zkzz as? mum/a /s ,0 «3/ #r. If: #37 overlap of .r orbitals. overlap off) orbitals. tfifer, rather than sharing, of electrons. interactions between elements with similar electronegativity values. interactions between two or more elements that all have low ionization energies. Which of the following is the most electronegative? “El. 0‘9 (3. d. E. scandium #5951: (IR/fits 5"” or! ‘1“; W'IJ; '7“!- W- M“; W a M ed 4M F ,3 #- M carbon aluIrinum a Manggyflit 2,ch (9.0) iodine in area“; /’ as,“ 1:9“ij ZZoL‘JPO’y .- :fi f '7 14m, 9:. 31"”7 ' . 3' '26. Although they aren’t shown, how many lone pairs of electrons are actually present in this molecule? ; no 1 4 H :o — H l). 5 I l ‘ ‘ .‘ c. 8 H—(f —’O.—{i)—?: .. Q 11 H H C=O e. 22 I. "’ .1 F. . O 27’. What is the approximate hydrogen—carhon—oxygen bond angle in the molecule shown in question '26? a. 60° flu, are 41/ 3%: we) ‘/ (9/3155 mam! C. 1). 90° Q 109° Mfg? o d. 120° e. 180° '28. What is the approximate fluorine—carhon—oxygen bond angle in the molecule shown in question '26? a. 60° 9L 1). 90° 3 (giant! M M” c. 109° {500 Q 120° e. 180° '29. Which of the following is an AB4 compound that is described as polar 231d bent? H . c a. (—J.l._ili(—:l'uJ ’ ‘4 '1‘ ‘- ’ a l 61-" ’6‘ : ...-$'...»0<- (LCM-FCC! l). 502 I u l a c. CH4 ‘1’ «:1. fl 9 012. H .jflfi' {:2- ,... H #77:" “A63? (fiég ”3,0) 30. What weight in grams corresponds to 0.50 mol of CaSOJf.D Z LP. 9;: cwd Il- @ 68 g CA- 9" *srk’llu Jo 5'36, firm 1). 136 a g 3L «Hook my 74mm, 2-: W G"! c. 27-2 «m, 406) d. 0.50g Igb/W/ e. 88 g (a.§0mf (2.10% W == q, d. PC1— 31. A flask contains 0.040 mol of N2. How many molecules of nitrogen are present? @ 2.4 x 102? molecules (6.090191! ”2- 5,0Lx1013we‘dx’03— l). 1.5 x 102” molecules £0, ”L c. 6.? x 1023 molecules d. 3.4 x 102'?” molecules 2 {/1 ’01; ”Itch/5 e. 8.6 x 102” molecules Refer to the reaction shown below for questions 32 —35. The equation is correctly balanced. N20. + 2N2H. —) 3N + 4Hgo 32. How many moles of N204 are used in the production of0.30 moles of nitrogen gas? a. 0.30 mol fm/ ”‘9', 1). 0.6011101 @301"?! ”#1 3m! «6’2, - 0.1 Ara/102,05! c. 0.90 mol @ 0.10 mol e. 1.0 mo] 33. Assuming plenty of N204 is available, how many moles of water are produced when 0.90 moles of NET-I4 react? . 3’ ll 0 .. a. 0.45 mol (03905“, ”z/Iyfiflm 3’ 3 a» [.8 ”9/ ”‘0 l). 0.90 mol at?! ”I”? Q 1.8 mol d. 4.0 mol e. 3.6 mo] 34. How many moles of nitrogen gas could be produced from the reaction of 184 grams of N204? C) 6.0 mol / am a 3,»; ”a l) 2 0 mol (lgtf, ”Logx M 3' Y I” d g ‘.0 m/ ”Z.- c. 0.6? mol d. 0.50 mol e. 1.5 mo] 35. About how many grams of water would be produced by complete reaction of 6. 0 grams of NEHJP? a. 21 g (6 0 ”If! [My] Maj/y gm! ”2.0 I9 ”3,0 .. 03) 6-8 U i J 9‘ A] A! MI 101/]? 0 .. 6‘75} ”3'0 a EL) 2 ‘f 1 c. 12 g 'l. 1." r , ,. L .- l ‘5’ (”0" Mfiflffl em '26:; WW ’?-ZJ) e. 5.3 g 36. Which is the salt produced by the reaction of perchloric acid, HCIOJA with potassium hvdroxide? 4m .4 1+ :5»: L, m l). KOO.) .— zr M" @D KCIO. H" wyv f d. K206. Kala? f e. KEHCIQ. {AL-7" make #39 .38. .39. 40. 41. asl‘mlgg [Myé llama. Samnkfi-y ,2 /,§m#g’ ,1m%§ Balance the following reaction: P4 +éCl2 +4PC13 ’3 I}, “665‘. Wfik' ‘0‘“ If vou combined 3.?0 moles of Ifland 5.00 moles of C12, how much PCLJ would be form d? (00,5 7‘ ’ p w» er Pal GW‘ Mm @ 3.33 mol y ll" “at. 3 WW ' b. 14.8 mol 3-70 {.99 2‘ m C. 22.2 mol ” I: I 4: . , . d. 033311101 (3.70flf’a/X %¥ "3 IV» 3;”; P55? "L 'A’O of‘éfll-fiéa e. 3.7’0 mol (;.09fl/ ”infifi) 3 :33 M9; @ *Wtal Which aqueous solution will form a precl itate when combined with aqueous sodium sulfate? M3,“? a. aluminum nitrate b. potassium chloride @ barium acetateM 3‘2”" 6143600,. 4 d. ammonium bicarbonate {*5 ”41“ e. none of the above What is the shape of NCls? ‘0 GD _ 1 H 02.51ch trlgona pvramlc a ’ b. linear (31. ”a", 3+ 1 1 1 a] 44m «0/ H‘ifia c. tetralecra u . ” 4 4 tr d. trigonal planar "L h J Gag 31"!“ M ’13? 07: e. bent s“;- {W ’3 :ééi’fl 3% WM _ Ten moles of methane (CPL) and 10 moles of acetic acid a have nearly the same mass 1n grams.”g " flaw/cs =99 I60 ® v/contain the same number of hydrogen atoms. all" [lg/N9, j c. contain the same number of carbon atoms. (”I‘m/l, 6M'I 1&5:ch a?) “2’ d. all of the above e. none of the above W c4500)“, Mark choice e for #41 to earn 4 points! yflfl-ij/d/fy (flffi’waM/I M a. I will be careful over s rincr breal . “Jaw _ P h ‘_ ”dwell? 2c 5/01 b. I Will try to get some rest over sprlng break. c. I will tell my friends and family that I need time to study chemistrv during spring break. d. I will study chemistry over spring break. all of the above 1%”: :41, Jar! low A” ’4‘ ICE! ...
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