Practice Final Exam - Fall 2006 Final Exam K E Morlino...

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Unformatted text preview: Fall 2006 Final Exam K E Morlino There are 47 questions plus 3 bonus questions on this exam. Select the BEST answer to each of the following questions. PLEASE READ THE QUESTIONS CAREFULLY! ' Section I (will take the place of Exam I for those who attended but do not have a score! 1) Which of the following processes represents a physical change? ' on ubliming ice H2059 H10 063 6©¢E¢ B) burning of ethanol WED/“n” ’1; C) fermenting grape juice \ ' . D) the explosion resulting from combinin sodium and water Wmfl CAI—l E) hard boiling an egg (pm ‘01:“ 2) Which of the following does not represent a chemical property? A) stability of gold —” x2e“ ecu B) burning of gasoline \ fl/ C) rusting of iron in air D) shock sensitivity of nitroglycerin @onductivity of electricity Q“ s 3 CC!" [0 PD 3) Which of the following is a solution? A) aspirin tablets g M.\9 53W} n w a - (- 663" B) distilled water 5 do Sire» n 0% \:L C) light shefi‘fi gasoline Mlxwed E) table salt 5 L130$if0b “Ge; 4) The Erecision of a data set is considered to be 2001', if A) the accuracy is low. @5‘d\ B) the data do not stray from the average value. a) \ ,5: C) the accuracy is high. 7 V D) the data are a set of closely spaced numbers. @the data vary widely from the average value. 5) Which of the following measurements would be considered exact? unlimited Sica. $5.8. A) 32 sec. B) 1.83 g *0“ @ pennies 660 A: D) 30 miles \ " E) 2 in 6) Is the Law of Mass Conservation strictly correct? A) Yes, matter is never created nor destroyed. O~ D) At this time, it is uncertain if it is strictly correct or not. E) none of these is correct B) No, matter is destroyed daily by natural disasters like fires. @No, matter is converted into energy during certain kinds of reactions. Fall 2006 Final Exam Morlino 7) Gasoline in the United States costs $1.749 per gallon. Elsewhere, the cost is typically reported in dollars per liter. What is the cost in dollars per liter? (1 ga = 4 qt; 1.057 qt 3 1 L) *0“ A) 1.749 {76° 5 B) 6.618 \ ‘ C) 0.4373 @04622 E) 0.2311 1.74 ‘i avatars %;p\)o f". a X 135.110.) X 45+ 1-0575?“ e . 4&22. dialled: H. L. 8) What would be the volume, in mL, of 1000 g of ethanol if the density of ethanol is 0.789 g/mL? 350“ B) 789 696: E C) 7.89 x 103 D) 1.27 E) 0.789 IOOOfi X FiflL. .__ .7593 l2.C97 ml.- 9) A chlorineuoxygen compound is found to have a chlorine to oxygen mass ratio of 1.109. Which of the following ’_,__.._.._.___. x4: 6‘ 4.457 I mwS‘i‘ be whole. :Hz’ chlorine to oxygen mass ratios is possible for a dfiierentchlorineuoxygen compound? 0 a( @4437 C\ _ Llo‘i . B 1.214 ’- \\\b ) O i . J/ C) 1.000 c§ \\ q031W)" D) 2.428 R e“ D E) 5014 0 \ 4/ . A—2 Fall 2006 Final Exam (47 0803413“) SFeCle'S Morlino 10) An atom containing 34 protons, 43 neutrons, and 34 electrons would have the symbol: A) 43Tc L» 2 = 3 4 :7 Se, 28¢,” C) 43Se 94’ + n° 2 34+43= 77 $9 D) 771: E) 77Tc 11) What is the mass of 1000 mole of carbon—12? gap“ A) 6.000g ~ Lb Octoms M a Wbondz B 1000 c’zy 0‘ Cillloog 15‘9‘3“"P€'§ bl) who“ (all alum; - . g {2/ D) 12.01g loo-we sme mass) 12) Which of the following compounds is molecular? NF3 n noflméral + Wont/“ELM 66}? B) 119.203 {L}? C) CuC12 D)~CdS E) NaOH 9 13) Which name is iflcorrect? A) KCl potas-s—ium chloride . F . 60300 B) PC15 phosphorus pentachloride mole/Mb? $27 P (B‘D'yes 9 “by C) C02 carbon diOXide mole/CA0“? =71“? ‘xe‘s azs disodiumsulfide Home» =7 ———r‘° nglxes E) 13313 boron tribromide molm\0r 11> X85 ‘mrflo 217140 Premxes ‘14) Typically, the mass of an atom of an element, in grams, is closest to A)1. \ (be)? B)10—32_ W UGow ale/Fl know 050% Can @iatwe e9 4/ C) 102:0 MM": 0 L4, : D)10- . 3 @10'22. Imole (L 03le5 = )2.0lca = ire-02230010» ms —-«22. wwf— 2 $1.01 x/o‘l4%/¢}Dmg Lg.ozzx1023 odva 0» m A-s —r\o crunef‘ War 35 CLAwal/Iefe clogs, and Carbon '5 Fe\0clriu6lL1 “663lle 15} How could you tell the difference between a pre—I982 penny and a post—1982 penny? A) The pre—1982 penny is more dirty and worn that the post—1982 penny. B) The pre—1982 penny has a larger volume than the post—1982 penny. (Q C) The pren1982 penny has a smaller volume than the post—1982 penny. G D) The pre—1982 penny is made of zinc whereas the post—1982 penny is made of copper. @wne ofthese Pra 82 =17 Pure C’W + WELL"? W544 Zn PD" % 16) At what numerical value are the Fahrenheit and Celsius temperatures the same? A) —20 onoC-5X n40 0F=|~5-°C.+3Z x:1.8x+32 >«= “40 A-4 Fall 2006 Final Exam Morlino Fall 2006 Final Exam Morlino min 17) Calculate to five significant figures, the molar mass of the compound ammonium sulfate ..__' A) none of these ( Mm Sol 665‘ \ C) 114.10 amu 132.14g E) 132.00amu 74: (ZXJ4.OO7%>+(EX l.oo&)%b+(l x32,o¢,43)+ (4x 15.9???) 771: 152,338 $132.14} 18) Calculate the ma'ss, in grams, of a sample containing 1.85 x 1034 molecules of water. x 11 >290 @553 10 l'gsflogél mo\m\es 1410 x be”? 3”“ LOOZZJWBr-nolwde‘: Imole 49 C) 8.46x103 ., D)3.07x1019 : 6‘ 6 3L0 mon % E) none of these 19) Aluminum and bromine react vigorously as represented by the following: 2A1 (s) + 3312(1) —) 2Allir3(s) I" Mlg‘mtgrer \\ so" . r60» % ON. What mass of product, in grams, can be made by reacting 5.0 g of aluminum and 22 g of bromine? ’5' A)” 50 )fi 1m°\eA\ ‘ Zmol Algr . mx 3_ ‘JS5mol/LHBI' 24 633 + 213*- qsg/‘A 2mm: * 3 C) 15 _ \xm remade!» D)17 W“ 27:: Emil/x lmo\e Bo. X ZW‘A’lBrB : .OC] zmol AlBrB E) 27 lsc'l. Bri- gfl‘ol 8"; .qu max AlBrgx lfl—Wgr = 24.543 “Era 20) Calculate the molarity of C1‘ in 245.0 mL of a solution containing 23.4 g BaClg. -—. L] 0 2+ -—. W“ 33:75 M ~ Moles e1 EaC/l 2. ~57“ %a + 10’ 2/ - '" a 5"\ C) 0.112 2‘ 50‘“ 0.917 ._ E) 0.553 x —« 23'4?3 Bat/\Lx 208.15%Ba5l2. lrrxoleC/lz . 2.2, meal Cl" : .: l M .245L 0.? 7M C-S Fall 2006 Final Exam Morlino 21) Which of the following species is not a base in water? @ CHgOH é— OJ COLE) '\O[\ B) NaOH C? C) NH3 0 @ bv’lz D) CH3NH2 E) All of the above are bases in water. 22) Which of the following is a spectator ion in the reaction between NaOH and HCl? 5 m ‘5 .09 AW ~ _ + m 993:] Na+ béfiggfi onbfi may» mag—a- Meow + 196%) 26%; by 01—120 D)0H- Sims; E)H+ loa‘l'ld CA— ccnal Mail aft: Spec-lash? ions. 23) Which of the following is incorrectly labeled? A) KCI — strong electrolyte séd‘ B) HCl — strong electrolyte 66 \ C) HCOOH — weak electrolyte Av @ HNOZ — strong electrolyte 143 60k- O—O-Nd C n l'l’fo US 5101 E) NH3 — weak electrolyte a 24) What is the oxidation number of m in Cr207'2? A) +2 - of‘ 36 B) -3 1.. (WC/Al“ C) +4 er 07 D) +3 ’2 - 7.. GE)” (-3 49+ 62-7): *2. 25) An oxidizing agent ,3 2 +29 A) must contain oxygen. 9 no)? a.) cJGM-f S ‘l-i‘u- e %e53<\oo B) increases its oxidation number. (.7— _ ,0 xi (flak-hon =3: decreaseol [3‘ ,5 C) loses electrons. Q“ Qqai 0S elecfi’r ens D) becomes oxidized. Q— beeo mes redwced @none of these C-6 Fall 2006 Final Exam ,, Morh’no 26) Which is not true for an endothermic reaction? 45 ___.. Ema uo A) The temperature of the surroundings decreases. p B) The enthalpy change for the reaction is positive. H “ O %€5-3<\% ©The products have a lower enthalpy than the reactants. JCS Lg ' D) Heat flows from the surroundings into the system. E) All of the above are true. 27) Consider the following thermochemical equation: CH4 (g) + 12 (g) —> CH31(g) + H1 (g) AH" = +23 k] W‘ 4760 A What energy change occurs when 2.4 mole of CH4 reacts? " . U] A) 23 1415 absorbed m when \ mo\5 OD C/Hé reds B) 9.6 k] is absorbed _ \S a. lo 501‘ @55 k] is absorbed 2 $45 03 h €07“ D) 23 kJis released I 4 ‘ W4 23 ‘ E) 55 k] is released 2 mo X lmole — :5 ° 28) When a 18.5 g piece of copper originally at 995°C is placed in 58.5 g of water at 240°C, the temperature of the water rises to 26.1°C. If the specific heat of water is 4.180] g‘1°C‘1, calculate the specific heat of copper. c350” A) 63 I ~1°C-1 (7% 9 ' g _ [9. O.38]g‘1°C‘1 a Cu loses loadi— C) 0.851g‘1°C“1 FWD cums heati' D) 2.6 Jg~1°c~1 1' E) 8.8 }g‘1"C'1 mo... @xcmc’ 015%“: _ Ciiiilfi‘c'hw mm mHLo Fall 2006 Final Exam 7 Morl'mo 29) Use the following thermochemical Equations C232 (g) + 5/2 02 (g) r’ 2 C02 (8) + H20 is) AHO = 4300 kl C2H5 (g) + 7/2 02 (g) —-> 2 C02 (g) + 3 H20 (g) AH° z —1560 k] H2 (g) + 1/2 02 (g) —-> H20 (1) AH° = ~286 k] - in $6860 to calculate AH” for the following reaction: \51 - ‘ é—- 0 ‘9 €sz (g) + 2 H2 (g) -* (3sz (g) 83 “all n s - ~33ook3 __ ——-'v + .. A) +1560 k] z E? i’ B —3146 k .L ___ — k > ) I 2 (Hung + zfiugfi/B‘Qt’u AH 28b 3 0‘16“ is. H + 1 AH: socks D)—2860k] Mg )A— M 3 at u 26 3 -3121<I _ _ + arable @ Q/LH‘LCak) 'i’ Zl‘\2.£583 “‘7 C; “(16%) A“... ( a B + l S [903:3 *— 30) What is the difference between extensive and intensive properties? __ 3 )2 }<3 exact“ A) Extensive properties occur outside a system, while intensive properties occur inside. 9’6 g B) Extensive properties include color and smell, while intensive properties include enthalpy and mass. Lo ' ©Extensive properties depend on the quantity of matter, while intensive properties do not. D) Extensive ro erties de end on the kinetic ener y of a s stem, while intensive ro erties de end on the \ 60 P P P g Y P P P potential energy. E) Extensive properties are state functions, while intensive properties are not. a 31) Which of the following equations correctly describes the reaction illustrating the standard molar enthalpy of formation for C3H804 (l)? 3 960560“ A>C3 (s) + H8 (g) + one s C3H804U) -iocmoai'lon 0i) “‘0 6’ Ur] B) 3C(graphite)+ 8H(g) + 40(g} —> C3H804 (l) 0:, ng‘i’arn 06 On ©3qgrapme) + 4H2 (g) + 202 (g) -> C3H304 <1) ©\gmen‘\6 in sin/nelan / D) 3c(graphite)+ 4H20 (1) a C3H304 (1) «5% . E) 3 CH2 (g) + ZH’" (aq) + 202 (g) ‘r (33118040) 32) If it takes a beam of light 1.28 s to travel from the Earth to the Moon, how far is it, in meters, to the Moon? (c:3.00 x108) Donog #_. own A)2.34x108 lag—9 X3 m = 3.84x303m %ep 5 B) 2.72 x 108 4 ' @334 x 108 133.00 x 108 E) More information is need to answer this question. C-8 Fall 2006 Final Exam Morlino 33) Which of the following types of electromagnetic radiation would have the longest wavelength? A) Visible B UV .\Dr~ ) 660 © microwaves 4 D) IR E) x—rays 34) Which of the following is a possible set of quantum numbers for a gig electron? (n1 21 m2! m8) \{ion A)3,0,0,+§i n: 3 gay O\ a) 3 2 O __ l. )6 : 2 4 u I I r 2 ‘- _ 2 H 1 0 + l 1- Z 1 m’e ' l J 1 J C) 3, 3, 2, + E— ’ = + i- l 1 m 5 7,, 0 (- Z D) 3, 1, l, + — 2 1 4 2 — —- E) , 3, , 2 35) Which of the following is E)! a true statement concerning the energy of orbitals? I on A) All orbitals within a subshell of a multielectron atom are at the same energy level. \ . 96c} B) In high numbered principal shells of a mulfielectron atOm, some subshells of different principal shells I?) \ have nearly identical energies. u C) In the hydrogen atom, all subshells of a principal shell are at the same energy level. ® Orbital energies are higher in multielectron atoms than in the hydrogen atom. E) In a multielectron atom, the various subshells of a principal shell are at different energy levels. 36) Does the dogdeer get his treat? A) Yes, always becauSe he's so cute. 2 {9 B) Yes, always because he's a good boy. o \p 6 6‘0 C) Yes, always because he is the center of the universe. 0' (\6 U) Us 0qu 56)" D) Yes, always because he is loved. (‘3de fig @All of the above. COW Fall 2006 Final Exam Morh‘no 37) Which element would have the following electron configuration in the ground state? 152 232 2p6 3523131 oxgxohAm Z 5 13 ‘96 B) P g C) N D) Ga 38) Which of the following species would have the greatest attraction to a magnetic field? RD“ A)FeZ+ 4 “Ape,le E:- mos-sr Parmmfinc‘l’lfla 93‘? BlFe 4 u,anle e: 95}? (302' O whpmlf‘ecl e” D) Fe-2 2 I’m Feared @— @Fe3+ 5 wnpaif‘ecj e‘ 39) Given the following successive ionization energies, predict which element they correspond to. 11 12 13 I4 \ n (MI/mol) 0.80 2.43 3.66 25.02 .9 6° _ ' U . . fl 5 q A)Be Z valence a bi SM“? remommd core a 9" B)N 6 oedema 8' 236 GB \ U®\€nb© 6" C @B 5 valence, e" Elc 4 vodence e" 40) Which of the following would have the largest (most negative) lattice energy? goo @Mng +2. -\ ‘9 F" smile? 560:5 B) LiCl +\ ~l +lnafi I" C) Mglz + 2. —l D) NaF +\ —l E) KBr .H -1 C—iO 7521112006 Final Exam Morlino 41) Which combination of elements would be most likely to form covalent bonds? A) lithium—fluorine melcd ~— flofiMfi-A‘d-l axon m E a \ .J__ n on B) sodiumn-fluorine ' nonme‘laal 3600 C) sodium—lithium awe/Arab (baa /\ D) carbon—sodium flDfl m 85ml "' OJ 0" @carbon—fluorine no n "‘ n O Ame} 42) Which is the best Lewis structure for COS? (Formal charges are not shown.) A) . l c, x 4= 4 2132025 sq fig, $23319 I. n .0. "- ( | ‘ I I S x (‘9 g (p B) l 0 "‘ 1L9 - D . _ — . '9' u t e— \\0 . S I ' = as : (76/ Q) 0-. .0 .d—- C» ‘ , 4 8 C : SEC—O: \ Q o a l. p D) C, (3:510 + F ‘ i O U 0 ) a LA) as O ® /h 6 S =7 t n o o C/ QJ‘CE s=c=o I. 9. C-C C-Cl C—F C—I eao\\5n A B C D q? ®A<D<B<C :2? 1/“ her, , More POLE/P B)A<B<C<D AEM Ch } C)D<C<B<A D)A<D<C<B A <'_D< B QC; E)C<B<A<D C-ll Fall 2006 Final Exam Morlino 44) Which one of the following speciesdoes rig obey the octet rule? A) H20 B) CH4 you C) C02 fl . ’ . 0 - ~9qu D) NH3 ._ f E. @3113 h—v e" dog'vwo'l' W E’x 45) Which of the following bonds is most ionic? _ n A) C'H ‘ \ awoke,er AE N 60560 B) Mg—N C? q fl C) C-F D) Si—Si @K—CI 46) Which one of the following processes would be expected to be exothermic? _ A)I<(g)—>I<+(g)+e- 1E.>o 69569“ B) 13:2 (1) —> Br; (g) Vapor-1 ufion>o A H 4 0 0‘50 C) Br: (g) w> 2 Br (g) (fife. r1? 0 D)I<(s) —* K(g) Solo\\m5rnon >0 @Br(g> + e a Br-(g) EA ' <09 C"? 47) Which of the following molecules would be polar? : '.‘ .bé (L .. A g2?!” W): MO 3630 B)PC15 y N P H ‘ \ofl/ C)C02 ‘9.“ mg Ema“ Sl‘ @502 MFG '. M50 mfif’3 M E) CC14 0/1.,“ :0 48) How many 0 bonds are there in a triple bond? . O G) 1 - n B) 2 0” l and); C) 3 1? L \O ' D) 4 E) 5 (3—12 Fa112006 Final Exam Morlino Bonus 49) The hybrid orbitals used by Xe in XeF4 are A) sp3d. A X 451 (p e: 3P0pr 8133612 ' ' \ Xé, / ” x’t *0“ (3)813. '1” /‘.\ “l dle‘L‘LLY ‘56) A D) sp3. ‘E. £9 If)?! \0 ‘ E) spz. V Spa-:1?“ chipmlc orbi‘l—n-LS 50) For potassium, the enthalpy of sublimation is 89 kJ/mol, and the first ionization energy is 419 kJImOL The bond dissociation energy of BIZ (g) is 193 kI/mol, and the electron affinity of bromine is —325 kjlmol. The enthalpy of vaporization of Big (I) is 31 kI/mol. The lattice energy of KBr is -682 kIImol. Calculate the overall enthalpy ————-v—-C~ change for the reaction: (56%; 1((5) + ~3—Br2 (1) —> KBr(S) A 2: ? o" A) +256 B) —332 ‘—_7 A H F 8 C! C) —780 K C5) Jgfi 3256 fig“? (68 491/? an; 41qu ~387 J“ F 1(Brzcia—s/Qxfi AHz; gunk) —— 2%le qu5+4|sK3+ égilal‘fiiE-laazéks l9 1 A = "‘ 3 %7 Happy Holidays” Final Grades will be posted on Blackboard Thurs, Dec 21, 2006. C—13 ...
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This note was uploaded on 04/07/2008 for the course CH 101 taught by Professor Morlino during the Fall '07 term at University of the Sciences in Philadelphia.

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Practice Final Exam - Fall 2006 Final Exam K E Morlino...

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