,hemistry 12 1 Final Exam Fall 2007 December 4,2007 Oregon State University Dr. Richard Nafshun Instructions: You should have with you several number two pencils, an eraser, your 3" x 5" note card, a calculator, and your University ID Card. If you have notes with you, place them in a sealed backpack and place the backpack OUT OF SIGHT or place the notes directly on the table at the fi-ont of the room. Fill in the front page of the Scantron answer sheet with your test form number (listed above), last name, first name, middle initial, and student identification number. Leave the class section number and the test form number blank. This exam consists of 40 multiple-choice questions. Each question has four points associated with it. Select the best multiple-choice answer by filling in the corresponding circle on the rear page of the answer sheet. If you have any questions before the exam, please ask. If you have any questions during the exam, please ask the proctor. Open and start this exam when instructed. When finished, place your Scantron form and note card in the appropriate stacks. You may keep the exam packet, so please show your work and mark the answers you selected on it. Rule 1 :All nitrates, group 1A metal salts and ammonium salts are soluble; Rule 2:All carbonates, hydroxides, phosphates and sulfides are insoluble. Rule 3 : Rule 1 always takes precedent. 0 0 1 Nitrate NO3- Phosphate ~04~- centi (c) = 1 / 1 00 1 inch = 2.54 cm (exact) Hydronium H~O+ K = 273.15 + "C Hydroxide OH- Acetate CH3COO- 1 atm = 760 rnm Hg = 760 Torr Cyanide CN- Carbonate ~0~~- Abbreviated Solubility Rules: Ammonium NH~+ MIVl = M2V2 Sulfate SO$ L atm R = 0.0821 kg m2 R = 8.314 mol K Molar Mass s2 .mol.K Macidvacid = Mbasevbase 4y -- - n,T, n2T21 2 H He Hydrogen Helium 1.0079 IIIA n7A VA VIA VIM 4,0026 3 4 5 6 7 8 9 10 Li Be B CNO F Ne Lithium Beryllium Boron Carbon Ninogen Oxygcn Fluorine , Neon 6.941 9.01218 10.81 12.01 1 14.0067 15.9994 18.9984 20.179 I1 12 13 14 15 16 17 18 . . Na Mg A1 Si. P S Cl Ar Sodium Magnesium vu Aluminum . Silicon Phosphorus Sulfur Chlodne Argon 22.98977 24.305 IILB VB vlB MIB < 1B 26.9815 28.08% 30.97376 32.06 35.453 39.948 . 19 20 21' 22 . 23 24 25 26 27 28 29 30 3 1 32 33 34 35 36 K Ca Sc Ti V. Cr Mn . Fe Co Ni. Cu Zn Ga Ge As , Se Br Kr Porarnium 39.0983 37 Rb Rubidium 85.4678 55 Cs Cuium I329054 87 Fr Francium (223) 57 "La Lanthanium 138.9055 89 Ac Actinium 727.0278 Calcium 40.08 38 Sr Suonrium 87.62 56 Ba Barium 137.33 88 Ra Radium 226.0254 58 Ce Cerium 140.12 90 Th Tl!orium 232.0381 Scandium 44.9559 39 Y Ylmum 88.9059' 57-71 *hcanhs 89-103 '~crinides 59 & Rasedpium 140.~7 91 Pa Rotactinium 231.0359 Titanium 47.88 40 Zr Zinium 91.22 72 Hf Hafnium 178.49 104 Rf Ruthehcrfordium (261) 60 Nd Neodymium 144.24 92 U Uranium 238.029 61 Pm Pmmethium - 145 93 Np Neptunium 237.W82 Vanadium 50.6415 41 Nb Niobium 92.9061 n Ta Tantalum 180.9479 105 Ha Hahnium (262) 68 Er Erbium ' . 167.26 100 Fm hiurn (2.57) 62 sm Samarium 150.4 94 . Pu Plulonium (244) Chromium 51.996 42 Mo Molybdenum 95.94 74 W 7bngsren 183.85 106 Sg Scaborgium (263) 69 Tm Thulium 168.9342 101 Md Mcndclevium (258) 63 Eu Europium 151.96 95 Am Americium (243) Manganese 54.9380 43 Tc Technetium 98.906 ' 75 Re Rhenium 186.207 107 Ns Ncilsbohrium (262) 70 Yb Ytlerbium 173.04 102 No N&lium 259 7 1 _Lu Luutium 174.967 103 Lr Lawrencium 262 64 Gd Gadolinium 157.25 96 Cm Curium (247) Imn 55.847 44 Ru Ruthenium 101.07 76 0s Osmium 190.2 108 Hs Hassium (265) 65 Tb Terbium 158.9254 97 Bk Berkelium (247) Cobalt 58.9332 45 Rh Rhodium 102.9055 77 Ir Iridium 192.72 109 Mt Mciulerium (266) 66 Dy Dyspmium 162.50 98 Cf Californium (251) Nickel 58.70 46 Pd Palladium 106.4 78 Pt Plarinum 195.09 110 * (269) 67 Ho Holmium 164.9304 99 Es. Einsteinium (254) Copper 63.546 47 Ag Silva 107.868 79 Au Gold 196.9665 Ill * Zinc 65.38 Gallium 69.72 Germanium 72.59 48 Cd Cadmium 112.41 50 Sn lin 118.69 82 Pb Lead 207.2 49 In Indium 114.82 henic 74.5216 51 Sb Antimony 121.75 83 Bi Bisnuth 208.9804 80 Hg Mercury 2W.59 Selenium 78.96 81 .11 Thallium 204.37 114 52 Te Tellurium 127.60 84 Po Polonium (209) - >Stable region? Bmmine 79.904 Wpmn 83.80 53 I. Iodine 126.9045 54 Xe Xenon 131.30 85 At Astatine (210) 86 Rn Ridon (222)1 Unit 1 (Material Assessed on Exam 1) 1 1. A student measures a sample of sodium chloride to be 45.233 g. Another student measures a sample of lithium fluoride to be 123 1.43 g. Added together, the sum of these samples is (with the proper number of significant figures): I (A) 1276.663 g (B) (C) 1276.7 g (D) 1277. g (E) 1.28x103g 2 ,*,*at ., neutrons 2. Fill in the blank. The ratio of - as the atomic number increases. protons (A) (B) decreases (C) stays the same For ararnplc'~ \s\ q~e+ Xe 2 5Y I' 3. Which of the following chemical formulae is incorrect? ) A\ ,a, (D) Na2S 4 (E) CaC03 4 4. 208~b2+ has: (A) 208 protons, 206 neutrons, 208 electrons (B) (C) (Dl (E) 126 protons, 126 neutrons, 124 electrons5. The mass percent composition of oxygen in A12(S04)3 is: (D) 14.03 % (E) 18.71% 6. The two stable isotopes of bowlium are Bl-323 (mass = 323.045 amu and a percent abundance of 67.22 %) and B1-325 (mass = 325.01 1 amu and a percent abundance of 32.78 %). What is the average mass of bowlium? (A) (B) 324 amu (C) 324.03 amu (D) 2203 amu (E) 315.1 amu 7. The chemical formula of ammonium sulfide is: (A) AmS04 b \I8. Which of these pairs of elements would be most likely to form an ionic compound? (A) P and Br (B) Cr and K (C) C and 0 (D) CC-) (E) A1 and Rb ; ,P,* s 6 9. The names of Mg(N03)2 and CC14 are: __ ,..- -1,. ..--1.--1- ..-=-. -- ..-. x.s-.*.K'.-~.,. (A) iharmesium nitrate-and carbon tetracm \/ u .----r--..- -,.->--<----- --4 (B) magnesium nitride and carbon tetracli'loride (c) magnesium dinitrate and carbon tetrachloride (D) magnesium dinitride and carbon tetrachloride (E) monomagnesium dinitride and carbon tetrachloride 10. Provide the coefficients needed to balance the following combustion equation: (A) a= 1 b= 14 c = 9. d=20 (B) a=2 b = 9 c= 18 d=40 (C) a= 1 b = 9 c= 18 d = 2011. A student obtains 450.4 grams of ribose, C5H1()O5 (s). HOW many ribose molecules are present? (A) 7.226 x -. ribose molecules b (B) 2.408 x 10" ribose molecules ~XC=D 5xr2,a!t9/~4\ 60.6s ef-! \&,w 9 [Or ~~OOT~'/,.\Z 10.0% 3/~*\ 0; ~x\b.o~g/wai = 80.00J/w.l -I__R 12. A student reacts 309.74 grams of P4 (s) in an excess amount of oxygen. How many grams of P205