E3formJKey - 53 Kg.— Am:s“-~ 5,507 1 Which gas has...

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Unformatted text preview: 53 Kg, .—- Am :s“--~ 5,507 1. Which gas has hydrogen bonding as one ofits intermolecular forces? a. C 7 :5Br b. C 7 :4 c. HCl d. propane, CH3CH2CH3 CHaoH mm 0*}; M 2. What is the volume occupied b31200 g of helium gas at STPP a. 22.4 L L' b. 44.81, > B NZ—L. c. 11.2 L i d. 67.2 L 112 L 3. An aqueous solution of an alcohol is 0.00500/0V/V. What is the concentration in ppm? .1. II_!-.1'II|1|.‘IH / |'-. ‘-_|'3'|:pm a "'-'|-‘|-“” a-oas-amt' x/O '3'": 1|. ‘-|'I'|'I"'|zm ‘.1|']l]|'] |1|1|H "i'i.-"'|1ic'|1:-II|-:| l1:I'-..-‘-:- :1 in :-::i1 III I-:- Ii: :I L‘ a. I/ water evaporates from a hot surface b. solutions of NaBr and Pb @032 are combined, forming a precipitate c. / sugar is dissolved in water QM} k m‘ d. a and b a and c 5. A gas occupies 8.0 L when the pressure is 5.0 atm and the temperature is 50.0 K. What is the temperature if the same sample of gas occupies 4.0 L at a pressure of 2.0 atm? a. 0.064K flu, ” AV,” 7; g Ppl/LTF b. 7-7 7-1... w, c. 1.0 K mm P; #1 T2,. =- PJJI 7-2.. = L: “h’tquflgv 1'34 e. 40. K Ls'dml '2 L) 6. Which of the following conflicts with the kinetic molecular theory of gases? a. Gas particles occupy a negligible volume compared to the volume of their container. The average kinetic energy of the particles is proportional to the absolute temperature. Gas particles are in constant, random motion. @(Dipoledipole intermolecular forces of attraction exist between polar gas molecules. e. Gas particles undergo elastic collisions with each other and with the container wal . 4;... Mflfl‘ymyjflefigd «me‘r 6- 7. A given mass of oxygen at room temperature occupies a volume of 5000.0 mL at 15.0 atrn pressure. What pressure must be applied to compress the gas to a volume of only 150.0 mL? 500atm ,. Pat/L— b. 150 atm c. 5.00atm pz' 5 P, V, __ QS'alm $193011! 2: Show d. 1.50 atrn Iguana!“ e. 0.45 atm 8. If 400 mL ofwater were added to 0.40 mole fNagS what would be the approximate concentration of sodium iopg in the resulting so u on? a 10 M 2.5/9.4 . . b. 3.0 M Muffin] c. 0.33 M d. 0.50M 9.40W’A/“Wsoyw {’37 $2.22 2/11 M u- 20 M ad/ L. .-"""-'.‘.1‘.|Illllllli“All'1“:|1:-:'17:|l-2':|l 1|1-2- :‘.:\|H-:- It‘lllln'lnllll-Z' :m-zl |:\-:-::;:III-:-. |1-: wally Ill-Z'Ii‘. -: :-l'-: 2-35-1051] law-c. :II-Z' mural-rel in |£‘:|-'l -m|:|-:-1-:-|:,-' ‘-...=.'H|1 '3‘.“ l, III-l-:IlH|H-Zi-|]l:| law-3N 11.- "I l‘ll 10:32] | '3 :"‘|:I'.-“W"| l‘l' '[Iz‘j | I'- I 1'“: 3m] ‘ l.|| I |:\ 1 I III '-1I\-|" '_ '3 ’ (adeQJCQ—w g. 2 {L c_ l..- .' "‘L‘Jm. 2.5 .; 02 gas e. 10. .5 02 gas 10. How much heat is needed for the following transformation involving 10.0 g ofwater? H20 (301M) @ 0.0% —> H20 (liquid) @ 30.0Oc filnt: Two separate calculations are necessary! Useful info on the front of the exam.) :1 3:: mm?!» + we}... m.) Wm c. 32 kcal 6‘ . a 1.1 kcal 79 7 4. 200 a- Iayyc Mid e 0.30kc31 1’" M 11. A flask contains 2.0 moles of H2 gas. When 12.0 grams of He gas are added to the flask, the pressure is observed to increase to 20.0 atm. What is the partial pressure of the hydrogen gas? 23:: UWU’eS-“JW' c. 12atm d 2ng grail-k p a. 2m”; 30%;:ng e. 17am ’2” ) 12. What is the concentration if a 2.0 M salt solution is diluted by a factor of 5? a. 10. M @ 0.40M L2") 7' é'wfl d. 0.50 M e. 1.0 M 13. The enthalpy change, AH, is 43.2 kcal for the reaction: N2 + Oz % 2 NO Formation of 90.0 g of NO gas will result in a. 43.2 kcal; absorbed "‘1 'I' 5' a 64.8 kcal; absorbed c. 130. kcal; absorbed 3 W, M d. 21.6 kcal; released I zb‘,‘ ‘- L i W I! ...|_:--: i—_.;-;I|; i.‘|.;.;l;;.;..;| m. " ‘ "aleftll’ being l-‘l. Jilll-Z' l'ull-z :-‘-..=...-'i|1;.\‘ I-:-.|-:'1i-: 2-H inanli-z-Imic': .-‘ l'i'i il'i 3'» r32} | '3 3') I12“) > I“ |'."3 1'3 3H I':‘.'I .i_ 'JlII-‘IiaI-fliull i1: |1-:-‘-..-'-:-| Lill-ZZ-IllJll-Z'IIIIZI,|-Z';“:||'Z||f‘1?1?iii-ill"l-Z'IHlF-Z'Iillllli'. |'-. 'Ii‘ll-‘I-Z'J-Z'li-II] ii:11‘!-::-I11:I|]-:--::-||1I.Il :Iill-Z'lllll-Z'I:Illll-Z'LT. ’ 'IJ‘IH |-2'.I-2'li- -|] i:: 1‘."-22-|]l:l|]-:--::-II11 .11 :Illl-Il-Z'li‘|]l|'-.-‘ |-: 1-2-I1an-I :Il‘ll W » «H!!- d. '1ch reaction is spontaneous at sullicicntly lugll Lcnlpclatulcs‘. :- “ms e. More information is needed to comment on the spontaneity of this reaction. 15. Which is the best description of the forces that would be present in a sample of the co$ound shown her e? H H o nuuf‘e I | || {mp/I . F——p—p—c—s—H H H a. Only London dispersion forces are present. b. Only dipole—dipole forces are present. C. London dispersion forces and hydrogen—bonding forces are present. u 4 fl 9 @ Oondon dispersion forces and dipole—dipole forces are present. m J 4 ‘9 e. London dispersion forces: dipole—dipole forces and hydrogen—bonding forces are present. 16. Carbon tetrachloride, CC14, will likely dissolve more ofwhich solute? Octane, CH3CH2CH2CH2CH2CH2CH2CH3 0M “’4' My - potassium chloride 59% Mr!" I“, c. water glucose, a sugar with formula Cal—11206 e. None of the above compounds is appreciably soluble in CCl4. 17. 18. 19. 20. 21. 22. What is the value ofAG at 298K for a reaction ifAH : 43.7 kcal and AS : 43.0152 kcal/K. _39.2 kcal be.» A}; ’75} «39.2 kcal ——43.3 kcal "" CV? «77w “Elna” 0‘“;ng :33 :21 '5 "'3"th How many moles ofgas are in gas—filled balloon that has a volume of67.0 L when the pressure is 742 mm Hg and the temperature is 250C? 2.24mol 2.67 mol 5’? mo U, 2” 2.1-1 9». 294%: ) ==~ z-w RT L9.o{?-Ii 293) 1.71 X 103 mol :affljich of the following gases would behave most like an ideal gas? . - ~ . % a.” 0414* w an” AMI-C— 5(5)?!ch {JWm‘ILTEMI League”: whey/{.5 \Which of the followin a ueous solutions will have the ' est boilin o‘ P g q rgflifiL 8.. c. d. E. 4.0 M glucose (a covalently—bonded sugar) If 15 M sodium sulfide, NazS 1!.6' 2.0 M calcium sulfate, CaSOfl 0.8 M magnesium bromide: .3] 7K 3MB!» 100}. m“ 5*“ 1.5 M sodium chloride 2, O How many mL of 12.0 M HCl are needed to prepare 250.0 I'I’LL of 2.50 M HCl solution? 12.0111; m,“ :- MLVL 25.0 m'_, 7 2.50 m; Lz'gmxm'g 5.21 m'_, 52.1 m; 53"“- lf 500 mL of a 0.28 M BaC12 solution were evaporated to dryness, how many grams ofBaClz salt would be recovered? K a. 7.3 g 29.2 g I .Z- c. 48.4g 0,151, 0.289;.— ug 5 2.7.! d. 116.6 g ( )( ‘- 31: I j 372 g Use the following chemical equation fozlquesltions 23 and 24in LeChatelier’s Principle. W fiflu'f-fcbg) + 33(2) r. Ming) 23. If this is an endothermic reaction, what is the effect of cooling the container and its contents? W a. the concentration of C12 will decrease k rmyffi A“)! @ ClF3 will decompose to form additional reacta ts c. the reaction will shift toward products (’5 d. C12 and F2 will react to produce more C1F5 e. adding or removing heat will not have any effect on this reaction 24. Which of the following changes will cause a shift to the right? 1) increasing pressuIe/ 3) removing C12 5) addingF2/ 2) decreasing pressure 4) removing CL?! 6) adding ClF3 a. 2, 4, and 5 b. 1. 3. and 6 I. anal 1- '1"|.:||]c| !-. '7. -'|. .mcl 2‘11. '1‘le |1|||]]1--:'I -::-l'm::-|-:--:'II|-:-:: cal-51:11: ill :I Ii;\i-:| ‘-..=...'.|||-:--:| -:'-::I11;|iH-:-I i1: -:|c:-u|«|-:--1 :III-1 lll-Z'1£‘|]]|!£‘|:Il|||-Z' i1: |-:--1I|-:'---:|Ic:---I1-:-::i:;11i11i-z-cz-xi51ilml|'ic‘|'-..'iH1-:-m|:--I;|IIII--_"'xI'L-"lmii::1|1-:-c‘l13--:'1emIll-z-ln-z-ztztlll-z-a' i L'ch pic-sour; ‘-.=.-'i.1incicasc by a lactoi of: p M, n b. The pressure wil increase by a factor of 3. c. The pressure wil be one—twelfth the original pressure. P 2‘.“ P d. The pressure wil be one—half the original pressure. The pressure wil be one—third the original pressure. 26. Arrange the following gases in order ofincreasing average speed at 0°C. Ne 20 Xe :3; A: are H2 2... a. Xe < Ne < Ar < H2 1 7‘ . Xe < Ne < H2 < Ar IA,wa 9“” c. Ne < Ar < H2 < Xe Xe < A: < Ne < '32 e. Ar<Ne<Xe<':2 27. What mass of cesium acetate should be adde to water to make 1 kilogram of a solution that is 10.0% (w/w P a- 1-0 gl'k- :0 1093)) "'3 x00 b. 10. g [#9 J C9 1.0 >< 102 g d. 1.0 X 103 g e. 1.0 X 101 g 28 Wh'th ‘1'b' 'fthfl ' 'P fitvmi'ns ‘ . atis eequii riurn constant expression or e o owrngreaction‘ 2 Brl‘5tg) ‘5 BIztg) 51—72%) i 9 a. w d w , arm] 2mg] “5 M b. [:glfBrgl a mass] [BIFS l [E l5 Use the following energy diagram for problems 29 through 31. Assume the horizontal grid lines in this diagram are spaced at 1 k] intervals. Note: The diagram includes curves for the “uncatalyzed” reaction and for the reaction in the presence of a catalyst. 29. What is AG for this reaction? a. --l.5 lcj b. "3.0 lgj CE? 4.0 a d. —5.5 lg e. —7.0 lg 30. What is the activation energy (33) for this reaction in the presence ofthe catalyst? “15 k H b. 773.0 L' ’m MW c. "4.0 lg . --5.5 lg e. "7.0 lg 31. What is the activation energy (33) for this reaction in the absence of the catalyst? a. "1.5 lg G9 "3.0 lg c. "4.0 lg d. --5.5 lg --7.0 lg 2%- W Iaéml’!’ 32. Rubbing alcohol is 70% v/v isopropyl alcohol in water. Which description correctly describes preparatio’i of this solution? a. co "nbine 70 m_'_, ofisopropyl alcohol and 30 mL ofwater. b. co "nbine 30 m_'_, ofisopropyl alcohol and 70 mL ofwater. 9 p12 ce 70 m; ofisopropyl alcohol in a volumetric flask and dilute to exactly 100 mi, with WE ter. d. p12 ce 30 m; ofisopropyl alcohol in a volumetric flask and dilute to exactly 100 mi, with WE ter. e. Don’t mark E! V“ /c$ “in 33. At a certa'n high altitude, the air pressure is 0.00100 torr and the temperature is —1800C. How many molecules are there in 1 liter of air under these conditions? k ' a. 1.31 x 1&4 pg: nfi‘T’ 40 K #6 4. b. 8.9x1019 9’ 39” “Q'MX’OWXQ «=- /.72,v><;o“?m/ c. 1.725 x 10—5 J" 3" Rf d. 6m V1020 (0. 93K) O |.I'ZI-'| II'ZI'-"' m, g- -'-::-|H".|IlIll-2111;: .Ilt‘ 1‘.-Z'|.‘.Il.ll-Z"Zl .I Lif‘llllllf‘lIll-Zull'IlE' Ill-Z'Illl'Ildll-Z'. l:’--::-I|I i'iillllmlllll-Z'Illll -:'-::-I11.|in .\-:|I|-:--::-II:2 :2-::-|||1ic:-H:‘. --l-li1l1illm -:'lIl-:-I HIE; |'-II1 .ll Elilli-I-z-Ill -:'t:-H-:'-:-I]1I.|lit:-II::‘ .IL: :‘.|]-: Gone. 5 111011 0:19 4220 W m” ' m. mwfima . mat/«1‘va ‘4‘}? Which best describes this system as it attempts to reach equilibrium? “'1 at"; , r a. Solvent will move from left to right across the membrane. '{a I I b. Solute particles will move from left to right across the membrane. 0 Wmfl move from right to left across the membrane. d. Solute particles will move from right to left across the membrane. e. Both solvent and solute will cross the membrane as this system attempts to equilibrate. 35. Consider the reversible reaction: Ag) ‘3 QB At equilibrium, the concentration off; is 0.381 M and the concentration of B is 0.154 M The value of K is and is the predominant material present at equilibrium. - 1.. 20:2: .. .. Mm. .' I 7 K " [a] 5.3!! I ' * e. 16.133 Aunt an Val} “96°; 'M” 1? Ha! Io #205516}! M > A 36. A reaction wiWays be spontaneous if: ./ l. AG<O. ll. AH<OandAS>Q lll. AH>OandAS<O a. Zonly b. :1 only c ill only Q :and H e. :l and Ill 37. Which gas has London dispersion as its only intermolecular force? c9 b. sulfur dioxide, 802 c. ?C13 f0 d. '—l2© e. carbon monoxide, CO 38. A process that releases heat to the surroundings 0 li‘. :::|i-'| 1m '-ll]-"| mir' :mrl lll-" -"|]ll]:|l|")-.-' -'|1:|H;“-'- i1: Irv-gal i‘-..-‘-'-_ |-_ l: ::;|i-:| 1-::- |--:- -:-:-;-::-1|1-:-I lHl-2' :m-zl lli-z- -:'|llll:ll|1}-' filmy-9;:- iz‘. |:-::-::i1i'-.:'-:-_ lz‘. :‘.:Il-:l 1-22- -:-Il-:l-::-1l1-:-I mic‘ :IIl-Zl lll-z- -:-|]ll]:|l|):,-' -'l]:l|l':.“-:- iz‘. Il-Z'Ie“:|ll'-..-‘-Z'_ -';m only |--:- :‘.|3c:-Ill:l|l-'-::-||L‘. il' ' H -';m {alllfif |'--:-:1l:c:-|11;|I1---::-II;:il' .-"\.'3 ' '1 J‘L'. "El-"lucll c-l' Lch lc-llc-‘JJ.-'ing lonns ions ‘-u=-.-'h-;.-n -;lissc-lm-;.--.l in '-;-.-uL-;.-i :' a. glucose a.” aVJua” Walton-I4: b. C12H22©11 c. N20 d. carbon te trabr omide @ copper (ll) bromide C0914.“ 5f.— 13”} 40. If 100 mL of 0.2 M sodium nitrate solution and 100 mL of 0.4 M sodium chloride solution are combined, What is the sodium ion concentration in the resulting solution? a. 0.2 M 3.3M @ 3.4M 0.3;" May" 9",?” In? Mug afoul whines") ML. 41. Which statement is true about a phase change for water? a. ' I eat is absorbed when water vapor condenses. b. AS is positive in going from water vapor to liquid water. G ':eat is released when steam condenses to give liquid waterf’gsfl. ‘l d. AH is negative in going from ice to liquid water. e. Vone of the above. ...
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