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KEY-E2-Fall2010-morn

KEY-E2-Fall2010-morn - Kali 40W Warmly was(5 Ad 201 71,3 gm...

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Unformatted text preview: Kali 40W Warmly was? (5; Ad! [email protected] 71;} ,3 gm? flaw-7M may Mm; are germé/ej semen; of “Mo; «éflm. Each question is worth 5 points. Choose the BEST answer for each question. 1. Which of the following anions has a —-1 charge? a. nitride fi/ 3"” b. cyanide (in! ”9 chloride 45%“ b and c all of the above 2. An atom with valence shell configuration nsznp‘1 will form a 3?: ion. a- 1 + yam?!) (9% . b. 1— 2%) WWW} I; afiiz’zffi 2+ 2-" 0 V swift Em e. 3— 3. The phosphate ion is a. P3" b. PO; c. P032" d. PO42" ED For 4. What is the correct name for Bng? beryllium facade aattgww as) 1”” (firm?) as) b. beryllium difluoride C. beryllium (II) fluoride &_Wg\g§3¢w aw} Mali $9? Com/m7! sexism/sag; d, beryuimn (11) djflumide st Koala??? aiaazwaifr emf; we? HQ! m mafia . e. beryllium (H) difluorate (”5% VWFlflMg” (1de 3 5. Consider the following solubility statements. Which is / are true? a. all ionic compounds that contain the acetate ion are soluble in water 9/ b. all ionic compounds that contain the nitrate ion are soluble in waters“, c. all salts that contain alka _ ® a and b e. . all of the above 6. The ionic compound formed from the manganese (II) ion and the HCO; ion is: a. Mano3 277a 27” #693” b. MnZHCO3 . @ Mug—icogz d' Mga—ICO3)2 e MgZHCOa i 7. \Which will react with suifuric acid in a neutralization reaction to produce cesium sulfate? i 1 iii); ”2-559 "" 53501;? 'me CssSG's/ + 33,0 s . 1 I" (31—13014 Wag, Mag, ”1% we g.“ sodium sulfate e. cesium bromide 8. Suppose that X can represent any one of the alkaline earth metals. What is the formula of the compound formed from X and the sulfate ion? WW? 3;? 21. XS ; 01/ a” as. X gvi” g. e m c. X2304 d. X6002 e. X36002 9. Which of the following likelyr has the highest melting point? a. C82 . b' 602 a” cam/fen 74' c. CH4 d. CBI4 (E) (3513: ,‘W‘té, 10. The molar mass (or molecular weight) of dini‘rrogen tetraoxideis about a. 46 ngol ”3,09, In. 60 g/moi . + ,0 at 9'2... 3 c. 78 g/mol 2'6”» {f5 ) CM @ 92 g/mol e. 148 g/mol 11. What is the mass of 0.250 moi of aluminum hydroxide? a. 0.00321g flaw“ 0/2“” Mia/’93 . 0.0513 g / ... 195 g 2'? f Edi/é) t 35’) e 7%&9/ - :fzzg (__0,2.§“0ma% ?§%a!> 365:) e. . g . 12. Write and balance the equation for the combustion of CHI-13003. When correctlyr baianced, the sum of the coefficients for the reactants is: i a. 2 24 / V!» W 390:1“ Wife}; 48 gay? i "ii?” 7 e. 51 Which bond would be the most polar? Q/emé’fififf @gfafimafi, F—F 0.0 . - on (9,4 $VM wfim’lmfififim, 3.. b. C. (3—0 2': 0 “a; 5 $13 d. N—O of (a (3—15 /. ST” The total number of valence electrons involved in the Lewis structure of the carbonate ion is w a. 20 (20;; ' ' b. 22 / g \ 23 st safe) as 24 e. 25 Which one of the following is not isoelectronic with the fluoride ion? W as! 3. Ne (’03 F / 0%. GED 82" We, Mlzfififaé’ c. 02“ #336, d- Ms2+ we e. Als+ 1" 93 Consider the following reaction. Select the best description of this reaction. A1C13 + (NI-L0304 -> A3304 + 3 NH4C1 «50’ 5‘0! ”mi 56/ All reactants and products are soluble 3 b. All reactants and products are insoluble C. Both reactants are soluble; both products are insoluble 1 reactant is soluble and l reactant is insoluble; 1 product is soluble and 1 product is insoluble Both reactants are soluble; 1 product is soluble and 1 product is insoluble SeO2 has selenium as the central atom. This molecule is a bent molecule with LL ¢ 0 3 flags" ,ffi b. a bent molecule with M 2 U c. a linear molecule with it 92 0 g i a! u , ‘ W ‘2’“ fr??? 3 d. _ a linear molecuie with p. = 0 ‘9 "g g a a 30$ w j e. " none of the above Which has the smallest ionization energy? a. s 19. Draw the Lewis structure for CHBCHZCHZOH. The H—C—O angle in this molecule is about: a. 90° ' a! “E . -....,.... C9 1090 git-e wawé “:5 Mg; figs C‘ifiifiw' c. 120° / i f; ‘9 d. 1 80° H N e. There is not enough information available to answer this quesgoré; $9“ @ gas» 20. Nickel and oxygen gas react in a CgfiiEEEEA-Qfl reaction to form nickel (fl) oxide. How many moles of nickel are needed to make 3.0 moles of nickel (H) oxide? (Hint: Write and balance the chemical equation.) a. 1.0 moles 1.5moles g/Vi' + fig. warez/MD 3.0 moles Km ale: 3; (MM / C. 9.0 moles ‘mmwsm- 21. How many atoms of hzdrogen are in 2.0 moles of Cal—113? 2.2 X 1025 atoms 2.2 X 1026 atoms 25 c. 1.1 x10 atoms 3373/ (391%? d. 3.1 X 1025 atoms mwfiww wwwwww P, w e. 6.0 x 1023 atoms {may 7 W925 #a-gm; a...) 22. Which of the following molecules has it : 0? a. PBr3 cg a,” .5” Asia» I I " II F " b SFSCl fir wfiwfirl PM 2:" I ' I" ' g“ 69/ I fi I-ICN ffi F‘,’ #5: cl ll f th 1) fig I. #9133” ‘ a 0 e a we ‘9’ . #134, 1'th far“ none of the above #3} flyfwijflf gfiafiagmg M if in 23. all lone pairs to the molecule shown here. Angles A, B and C are respectively: a. 90°, 180° and 180° b. 90°,120°and180°_ H H H H c. 109°,109°and109° w | [ l_| m d _ 109°,120°and180° if, maC—C—C—N—H . ' 109°,120° and 109° Ll; LU Hi3 (50:3 Br-C—H C-C-C Mi A153. 24. You deserve a break! Mark choice B for this question. NOTE: You must mark B for this question to receive credit. Marking B is worth 5 points! 6.0 l ,w'" 'hw . ‘ . m0 es {hfzfimy/flméég game all relive “fife?“ éfl/W’Z 4?”! | i E i Refer to the reaction shown below for questions 25 — 28. FeZO3 + 6 HCl —9 2 FeCl3 + 3 H20 25. .Assuming excess hydrochloric acid is available, how many moles of FeCl3 are’formed from 0.25 moles of iron (III) oxide?" a. 0.13 mol (01.35000! ’gégp‘gz/Zmd @CQ’) gig? 099105;; b. 0.25 mol / mo! 9%3, 0} M’ ‘W‘ ”W (:2? 0.50 mol f] d. 2.011101 QM 052005000 65/”. e 8.0 tool 26. How many moles of iron (III) oxide are needed to produce 18 moles of water? a. 0.019 11101 b. 0.17 mo] a ma!“ 2%, WW 6 ”J C. 1.0 mol nggjéiijfi {Kw} #3:) (way, 6.0 mol . ft e. 54 mol #0,” dds/W4} a”, 27. __ ow many,r moles of HCl would be needed to completely react with 62. 8 g of iron (III) oxide? E 2.36 mol $3,633 E. 0.424 mol (.0539? 553,05 M09; M) g £33395? E}. 305': 393) E 0.394 mol " ’0?» ”7.30003 has} #35005 . 1.6? x 103 m1 2" fl ((3000—1000 ’ 5W3 0000/ e. 5. 99 x 104 mol 0‘49" 05/095000 s50 ...: ....... 1i ........ 28. How many moles of iron (III) chloride would be produced if 15. 5 moles of hydrochlorlc acid and 15.5 grams of iron (III) oxide were combined? Hint: Something might be limiting! Zgwiw/é"! [Mm a. 0.0215 mol 2m” 19596.0 . fig Q 019411101 @QQmma/Xflgg W '5 filmfifiw' of.“ 3 C. 5.17 mol “g ‘1' 46-53101 059352.051 ”gt/figfiéo 20"” Ft? WW3) @9009! #060“) I' .021? F‘ I ””””””””””” C. 8‘08X 10411101 j 055 we I??? 5010000 {3 Weak; 29'. In the reaction shown here, how man}r grams of 8110 are needed to react completely with 8.3 g of NP}? 3 8130 (s) + 2 NF3(g) —> 3 SnF2(s) + N203 (g) 24 12: War» 1W ”g rare... %0}- «2.5% c. " 6.6g flij 3 ‘2’“; Ma? ‘5 Kg. 7‘ 2017 W/ 63' 55’ .53; d‘ 16 g my Mama? 0. a m}. e. 44 g 0 30. Dichlorornethane, CHZClz, is an AB4 molecule with C as the central atom. The shape of this moiecule is: bent ' é linear " H . tetrahedral d. trigonal Planar ’0}? w a”!!! ”4’5 1’ {7% #041ng e trigonal pyramidal :00: E ...
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