1211 Practice Final - Name: Class: Date: 1211 Practice...

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Unformatted text preview: Name: Class: Date: 1211 Practice Final Spring 2005 Multiple Choice Meaty); the letter ofthe choice that best ccmpt‘eter the statement or answers the question. 1. The following properties describe zinc. Which one(s} is (are) chemical properties? 1. It is bluish-white metal. 11. It corrodes upon prolonged contact with moist air. 11!. Its density is 114 gfch. IV. It melts at 419°C. V. lt conducts electricity. a. "V and V b. V c. v d. .., IV, and V c. ._ 2. Which answer includes all of the following that are physical changes and no chemical changes“? I. the electrolysis of molten sodium chloride to produce metallic sodium and gaseous chlorine Ii. the solidification of mercury by cooling III. the reaction of hydrochloric acid with calcium carbonate IV. the mixing of water with ethyl alcohol V. cutting an iron bar into small pieces a. I and III 1}. 11, IV, and V c. I and [V d. 11, III, and V e. IV 3. The element whose symbol is C1 is a. carbon. b. chlorine. c. cobalt. 6.. calcium. c. californiurn. 4. What is 16.? cubic feet expressed in cubic centimeters? a. 1.55 x 10* cm’ b. 510 cm3 c. (3.159 cm3 d. lfl'fix “)3ch e. 4.?3x105cm3 Name: ID; A . A gold ring has a mass of‘ 15.37 g. lfthis ring is pure gold (density = 16.lgl’mL), what would the volume of the ring he? a, 15.3? 111]. b. 1.04 mL c. 0.955 mL (1. 16.] In]. B. 3.05 mL [1°50 g ofcopper cools from 350°C to 226°C and loses 23.6joules of heat, what is the specific heat of copper? a. 0.076 Jig-W3 b. 3.3 x 102 Jig-WC C. 0.38 Jfg‘°C d. 0.62 Jr’g‘°C e. 76 Jig-“C Choose the name—formula pair that does not correctly match, a. aluminum phosphate 3111304 U. calcium acetate CaCH3COO C. ammonium sulfide (NI-Id) 25 d. magnesium hydroxide Mg{OH)2 e. zinc carbonate 2211(3);a How many moles of POCI; are there in 10.0 grams ofPOCIJ‘? a. 6.51 x 10'2 mol b. 3.68 x10"mol c. 4.09 x 10': mol d. l.21x10"mol c. 1.17x 10411101 A compound contains carbon, oxygen, and hydrogen. Analysis of a sample showed that it contained by mass 53.4% carbOn and 11.1% hydrogen. What is the simplest formula. for this compound? a. CHO h. CZH50 c. C2H40 d. CH402 C . 502 Name: ID: A 10. A compound contains only carbon, hydrogen, and oxygen. Analysis of a sample showed that it contained 54.53% C and 9.15% H. Its molecular weight was dctemn'ned to be approximately 88 gimol. What is its molecular fonnula? a. €311.10 b. C4H30 C. CaHg d. CaHgoz e. Cafl I 202 11. What mass of ccrussitc, FIJI-:03, would contain 25.0 grams of lead? a 19.4 g b. 32.2 g c. 29.3 g d 25.4 g c 36.9 3 IE. What is the sum of all coefficiems when the foll0wing equation is balanced, using the smallest whole number coefficients? Do not forget cotfficicnts of "one". Ag+HQS+024AgES+H30 a. 9 b. 10 c. 11 d. 12 e. 14 13. If sufficient acid is used to react r.)om1:i1etel}r with 7‘23 3 of magnesium, how much hydrogen will be produced? ZHCI + Mg —)- MgClg + Hz 4.5 g 3.0 11101 1.5 mol 9.0 g 6.0 mol 509.0571.” Name: 1]): A M. If 25.0 g of each reactant were used in performing the following reaction, which would be thc limiting reactant? 3Pb0; + CrfiSOfl; + K2304 + ligfl —> 31.313304 + K2Cr30? + H2304 El P130; b . H10 C . K2504 (1 131330.. e Cr2(S 04); 15- What is the percent yield of elemental sulfur if 154 grams of sulfur are obtained from the reaction inf-5.16 grams of $0; with an excess of I'igS? EH23 + $02 —) 214110 + 35 a 72.6% b. 40.8% C. 81.5% d 83.4% c 91.4% 16. Calculate the molal'ity of the resulting Solution prepared by diluting 25.0 mL of 18.0% ammonium chloride, NH..C], (density = 1.05 gme) to a final volume of 80.0 1111.. a. 0.292 M b. 0.059M c. 1.10 M :1 0.0536 M 6 0.00105 M I? Wl'lat volume of 0.130 M HCl solution will just react with 0.424 gram of Ba(OH)-i? 2I-IC1 + BaiOI-I): —> BaClz + 21-120 3 38.] mL h. 32.6 mL 0. 24.1mL d 18.6 mL 6 96.? mL 18. Which one of the following salts is insoluble in water? a . Rb; 30-1. b. (NE-lihS c. Kl d. Grim.)1 e. Ni(COgj2 Name: 19. What is the net ionic equation for the following fern-Lula unit equation? Cu[NO;)1(aq) + stflaq) -> [3113(5) + 2HN03Caq} Cu2'(aq) + HESIIaq) —> Gusts) + 2H*(aq) [Cu2‘(aq_)+2NOy(aq)] + H;S(aq) —) CuS(s) + 2[Hi‘(aq)+2N05'(aq)] Cul'flaq] + 2H"{aqj + Sz‘qu) —r CuS(s) + 2H‘{aq) (3119:1311) + Sziaq) —) CuS{s) Cui‘faq) + 2NO3'(anI + ZH‘fiaq) + 32134;) —> CuS(s) + 2H*'(aq) + 2N03'(aq) 99515:?!» 20. Determine the oxidation number of the underlined element in H220; --1 +2 +3 -w4 +5 09151.5?“ 21. Which of the following matched pairs of name and formula has an error? Formula Name 3 H3901 phosphoric acid '3 H3503 sulfurous acid C. HClO hypochlorous acid d H5104 perchloric acid. c H1403 nitrous acid 22. ]n the following reaction NaClO; is SNaC|03(aq) + mom + 312(5) —> 6H103{aq) + 5NaCi(aq) a. the oxidizing agent and is oxidized. b the oxidizing agent and is reduced. :2. the reducing agent and is oxidized. d the reducing agent and is reduced. 6 neither an oxidizing agent nor a reducing agent. Name: ID: A 23. Classify the following reaction by giving all of these reaction typefi.) that apply. I. tedox I1. combination LII. decomposition 1V. displacement V. metathesis 2Pb0(s) + oztg) —) 2Pb02(s) a I and V b. 01-113,r II c. I and I! d only.r III e onlyr V 24. Give the number of protons. neutrons, and electrons in the S2 ' ion. a. 16p, 1811, 16: b. 16p, 18 n, 14:: c. 16p,16n.196 d 16p,18 n, 135: o 34p,16n,18e 25. Gallium has two naturally ocoun‘ing isotopes. E"’Ga (68.925? amu) is the more abundant isotope, at 60.4%. If the atomic mass of gallium is 69.723 amu. what is the mass of the other isotope,“Ga? a. 71 arm 13. 11.512 mm c. 39.60 amu d. 69.985 amu c. ?0.925 amu 26. What is the velocity ofa neutron of mass 1.6? x lO'ZF kg that has a de Broglie wavelength of2.05 A? a. 19 mils b. 1.94 X 103 W5 c. 8.13 x10J mi's d. 1.93 x 10“ mfs e. 5.16 x 10“ W5 Name: ID: A 27. Which response lists all the true statements about the four quantum numbers? I. n = principal quantum number, n = 1,2,3, ‘ . . II. I= angular momentum quantum number, I= 0,1,2,3, . . ., (n+1) 111. m i = magnetic quantum number, m ;= (—1), .1 .,0,. . ,, (+0 IV. m5: spin quantum number, m 2 ti ’ 2 a. I, II, and 111 b. I, III, and IV c. 1, E1, and N d. I and II c. I and IV _ 28. The electron configuration 15 2.9 2;) 33 31) 43 I} Ll l‘ ll H i ll T ll ll l. “1, represents the element a. Rh 1), Ca c. Ge (1. Ti c. 31' 29. If the following set of quanium numbers represents the "last" electron added to complete the gronnd state electron configuration of an element according to the Aufbau Principle, which one of the following could be the symbol for the element? :1 = 3.,l= Lmi =0.m,=i-;- a. b. c. Zn :1. e. 30. Which one ofthc following is an inner transition (f—transiiion) element? a. Rb b. Ho 0. C0 C1. Ru :3. Bi Name: ID: A 31. Which element has the largest atomic radius? a. b. [1N3 Cy 37Rb d. 9F 8. 531 32, Arrange the following elements. in order ofincreasing first ionization energy. Mg, AI, Si, P, S a. AI<Mg<Si<s<P b. Mg<A1<Si<P<S c. AI<Mg<Si<P<S d. Mg<A1<Si~CS<P e. A1<Mg<P<Si<S 33. Which of the lists of increasing ionic radii is not Correct? a. Cl' «1 Br '< I" b. A}3+ < Mg2+ C Ne‘ c. Ca2+ < Sr2+ c 13:5121 d. 52' < 0' ‘1’ K1 3. NT < 03' < N} 34. What would be the general balanced equation for the reaction of the ionic hydride MHz with excess water? a. Mice) + H200) a MOHfaq) + 1mg) 1:. MH2(5) -- H;0(l) —> MOLS) + 2Hz(g) C- Lil—12(5) “ —> Nil—12(3) + d. MHQG) -- QHEOU) —> M(OH)2(aq) + 2Hg(g} e. Mllfls) -- 3H20(1) -+ MO(s} + 41—11(3) + 02m]. 35‘ Write the balanced formula unit equation for the reaction of the complete combustion of‘ethane, C2116. What is the sum of {he coefficients? 19 16 ' 1'? 4 5 EDD-PF“? Name: ID: A 36. Which Lewis clot notation for atoms and ions is correct for the reaction for the ton-nation of aluminum oxide? 3A'I- + 2 4;: -w 3A13+,2[:§:]2c a. 211- + 3-6: - AI3+,3[=5=]2_ b. . .. zAt- + 3-6: —a- 2A13+,3|:5:]2‘ C. H 2211- + 3~E§z —» 2A13+,3[:§:]?" it + 3C}: —=+ A122 [fin]?— e. .. 3?. Which of the following is the correct Lewis do: formula for £125? H33 3. F1 H:§: b- H H::s:: c. H {1- H:I—I:§: H+ H=§:] e. 38. How many rosonance structures does the nitrate ion, N05 have? on.ch nonprofi- 39. Which response includes all the molecules below that violate the octet rule and only those? H20, Spa, NF}, Etc]; 3. H20 and SFG b. SFa, NF3, and Ber 0. H20 and NF; d. SEC.r c. SR, and BeCIz 40. Which one of the following compounds contains both ionic and covalent bonding? a. LiF b. KNO; 0. M30 d. CaClz c. Rb 5N Name: 41. 42. 43. 45. 1]):A The valence shell is a. b. c. d. e the highest eriergg,I level occupied by electrons. the set of orbitals used to make triple bonds. the orbitals belonging to the entire molecule. the lewest energy level occupied by electrons. the hard covering on crustaceans. Draw the dot formula for the HNO: molecule. The nitrogen atom is the central atom and the hydrogen atom is attached to an oxygen atom. On the basis of the number of regions ofhr'gh electron density about the nitrogen atom, predict the nitrogen atom hybridization- 8.. 599.057 3P .s'pz 51pi sp-ld 3:93:32 A neutral molecule having the general formula AB: has one lone (unshared) pair of electrons on A. What is the hybridization at A? a. Sp h. 3.152 c . SP3 d. Syd e, 5153:? Which response contains all the characteristics listed that should apply to silicon tetrafluoride, SiFi, and no other characteristics? 1. II III. IV. V. 951.0?!“ tetrahedral |20° bond angles 3;: hybridized at C polar molecule one unshared pair of electrons on Si 11 and III I I and V ll, 1V, and V none of these Which statement for NH; and NF; is false? Electronegativities: N = 3.0, H = 2.1, F = 4.0. a. b. c. d. (1. Both are 3133 hybridized at nitrogen. The bond angles in NF; are smaller than those in ma. "he NF; molecule is more polar than the NH; molecule. Both molecules have one unshared pair ofoleeh'ons in the outer shell of nitrogen. "he bond dipoles ofNF; are directed toward fluorine, whereas those in NH; are directed toward nitrogen. 10 Name: ID: A 46. How many sigma ((3) bonds and how many pi (1:) bonds does the ethane molecule contain? {WP-PET!” u. 9 .— :at 4?. Choose the species that is incorrectly matched with the electronic geometry about the central atom. Molecule Electronic: Geometry a. CF; tetrahedral b. Bear: linear c, H20 tetrahedral (1. NH; tetrahedral e. PF; pyramidal 48. Which molecule is incorrectly matched with the molecular geornehy‘? Molecule Molecular Geometfl a. I; — l inear b. BrFJ T—shaped GI BHr tetrahedral d. sbcls trigonal bipyramidal 5. N02— tetrahedral 49. Which species is incorrectly matched with the hybridization at the central: atom? SEecies Hybridization at: Central Atom :1. SEF5 sp3d 1). C02 5P c. Nag 5;? :1. Bell esp? 6. BeBrz Sp ll Name: SCI. 5]. .52. 53. 54‘ 55. Which species is incorrectly matched with bond angles? Molecule Bond Angles a. SiCl+ 109.5“ b. Bel; slightly less than 109° c. SFG 90° (and 180°) :1. Pist 90°, :LzoG {and 190°} e. BF3 120° Which one of the following molecules is polar? a. Sin b. SF‘5 Cy H2 61. I‘Cls 6, SF4 Which one of the following is a no npolar molecule with polar hon do? 3. H20 11. NH ; C. PF5 d. CHCI; 8. none of these The following describe properties of substances, Which one is not a property of acids? They have a sour taste, They react with metal oxides to form salts and water. They react with other acids to form salts and water. Their aqueous solutions conduct an electric current. They react with active metals to liberate H3. FDD‘E‘G‘P According to the Arrhenius theory, which. of the following is an acid? 21. NH; b, CH4 c. HCl d. H; e. NaOI-l Which of the following can be a Bronsted—Lo'wry acid? a. MCI3 b. CH4 c. NaOH d. H; O C. H; 12 ID n Name: ID: A 56. In the equation HF + H30 -—- P130" + F' 3. H30 is a base, and HF is its conjugate acid. b. H20 is an acid, and HF is the conjugate base. c. HF is an acid, and F is its conjugate base. (1. HF is a base, and H3O” is its conjugate acids e. HP is a base, and F" is its conjugate acid. 57. Which one of the following is a weak acid? 3. H2504 b. HF C. HC] d. HBi e. H] 58. Which one of the following pairs of acids is incorrectly listed? Stronger Acid Weaker Acid. 3. HClO HClO; b, HN03 111102 c. r1250fl H3303 d. H3503 H2560; Ei HClO; H104I 59. In the reaction BF] + NH; —) FngNI-I}, the BF3 functions as 3(an) a. Breasted—[om acid b. Bransted-Lowry base d Arrhenius base cl. Lewis acid e. Lewis ba 56 ISO. Based on the reactions we have studied, ammonia can be considered as a an Arrhenius base (only) b a Lewis base (only) c. a BIBDStEd-LOWIY base (only) {1. both an Arrhenius base and a Lewis base 8 both a Bransted-Lowry base and a Leuris base 13 ...
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This note was uploaded on 08/26/2008 for the course CHEM 1211 taught by Professor Atwood during the Spring '07 term at University of Georgia Athens.

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1211 Practice Final - Name: Class: Date: 1211 Practice...

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