Sample Chemistry 115 Placement Exam
Transcription
Sample Chemistry 115 Placement Exam
Sample Chemistry 115 Placement Exam Please note that the sample exam is designed to illustrate the type and degree of difficulty of the exam questions; it does not include questions from all of the topics that will be on the actual placement exam. Simply studying the sample exam questions will not prepare you for the placement exam. Instructions: To use this exam as an indication of readiness for the placement exam, give yourself 11 minutes to take the exam. If you can get 6 or more questions correct in 11 minutes, you are on track to get a passing grade on the Chem 115 placement exam. Answers are on page three of this document, so just print the first two pages to take the sample exam! PERIODIC TABLE OF THE ELEMENTS PERIOD GROUP IA 1 1 H 1 HYDROGEN 3 6.941 Li 2 LITHIUM 11 3 22.990 SODIUM 39.098 MAGNESIUM 20 40.078 3 21 IIIB 4 22 44.956 Sc SCANDIUM 38 87.62 39 88.906 Sr Y RUBIDIUM STRONTIUM YTTRIUM Cs CAESIUM 87 (223) 56 137.33 Ba BARIUM 88 (226) Fr Ra FRANCIUM RADIUM 57-71 La-Lu Lanthanide ZIRCONIUM 72 Ac-Lr Actinide HAFNIUM (261) VANADIUM 41 92.906 Cr Mn NIOBIUM 180.95 Ta TANTALUM 105 (262) 6 Fe IRON CHROMIUM MANGANESE 42 95.94 Nb Mo 73 55.845 51.996 43 (98) Tc 44 101.07 Ru MOLYBDENUM TECHNETIUM RUTHENIUM 74 183.84 W TUNGSTEN 106 (266) 75 186.21 Re RHENIUM 107 (264) 76 190.23 OSMIUM 108 (277) Rf Db Sg Bh Hs DUBNIUM SEABORGIUM BOHRIUM HASSIUM La Ce LANTHANUM CERIUM ACTINIDE 89 (227) 90 232.04 Co COBALT 45 102.91 Rh RHODIUM 77 192.22 Ir IRIDIUM 109 (268) 58.693 Ni NICKEL 46 106.42 Pd PALLADIUM 78 195.08 Pt PLATINUM 110 (281) IIB IB 12 30 11 29 65.39 63.546 Cu Zn ZINC COPPER 47 107.87 Ag SILVER 79 196.97 48 112.41 Cd CADMIUM 80 200.59 Au Hg GOLD 111 (272) MERCURY 112 ALUMINIUM 31 28.086 GERMANIUM 50 118.71 Sn TIN INDIUM 81 82 204.38 Tl THALLIUM 207.2 30.974 33 74.922 As ARSENIC 51 121.76 Sb OXYGEN 16 32.065 S SULPHUR 34 78.96 Se SELENIUM 52 127.60 18.998 F ANTIMONY TELLURIUM 84 (209) HELIUM 10 35.453 Cl CHLORINE 35 79.904 Br BROMINE 53 126.90 I IODINE 85 (210) 20.180 Ne NEON FLUORINE 17 Te 83 208.98 VIIA 18 39.948 Ar ARGON 36 83.80 Kr KRYPTON 54 131.29 Xe XENON 86 (222) Pb Bi Po At Rn LEAD BISMUTH POLONIUM ASTATINE RADON 114 (285) NITROGEN 15 PHOSPHORUS 72.64 GALLIUM In O SILICON Ge 114.82 N P Ga 49 VIA 17 15.999 9 Si 32 69.723 (289) Uuq Mt Uun Uuu Uub MEITNERIUM UNUNNILIUM UNUNUNIUM UNUNQUADIUM UNUNBIUM Copyright © 1998-2002 EniG. ([email protected]) 140.91 Pr 60 144.24 61 (145) 62 150.36 231.04 63 151.96 Nd Pm Sm Eu PRASEODYMIUM NEODYMIUM PROMETHIUM SAMARIUM 91 14 26.982 Al VIIIB 10 9 27 58.933 28 Os RUTHERFORDIUM LANTHANIDE 57 138.91 58 140.12 59 7 Editor: Aditya Vardhan ([email protected]) 178.49 Hf 89-103 104 (1) Pure Appl. Chem., 73, No. 4, 667-683 (2001) Relative atomic mass is shown with five significant figures. For elements have no stable nuclides, the value enclosed in brackets indicates the mass number of the longest-lived isotope of the element. However three such elements (Th, Pa, and U) do have a characteristic terrestrial isotopic composition, and for these an atomic weight is tabulated. 91.224 Zr Rb 132.91 TITANIUM 40 CARBON BORON 13 ELEMENT NAME VIB 7 VIIB 8 25 54.938 26 VB 6 24 50.942 V Ti Ca 85.468 IVB 5 23 47.867 C B RELATIVE ATOMIC MASS (1) B BORON 24.305 CALCIUM 55 7 10.811 VA 16 14.007 8 IVA 15 12.011 7 IIIA 14 10.811 6 13 5 IIIA 13 5 SYMBOL BERYLLIUM 12 K 37 6 ATOMIC NUMBER POTASSIUM 4 5 9.0122 Be He GROUP NUMBERS CHEMICAL ABSTRACT SERVICE (1986) GROUP NUMBERS IUPAC RECOMMENDATION (1985) IIA 2 4 Na Mg 19 18 VIIIA 2 4.0026 http://www.ktf-split.hr/periodni/en/ 1.0079 92 238.03 Ac Th Pa U ACTINIUM THORIUM PROTACTINIUM URANIUM 93 (237) Np 94 (244) 64 157.25 Gd EUROPIUM GADOLINIUM 95 (243) 96 (247) 65 158.93 AMERICIUM CURIUM 162.50 67 164.93 Tb Dy Ho TERBIUM DYSPROSIUM HOLMIUM 97 (247) Pu Am Cm Bk NEPTUNIUM PLUTONIUM 66 98 (251) Cf 99 (252) Es BERKELIUM CALIFORNIUM EINSTEINIUM 1. A substance releases heat when it changes from a. liquid to solid b. solid to gas c. liquid to gas 68 167.26 69 168.93 70 173.04 Er Tm Yb ERBIUM 100 (257) THULIUM 101 (258) YTTERBIUM 102 (259) Fm Md No FERMIUM MENDELEVIUM 71 174.97 Lu LUTETIUM 103 (262) Lr NOBELIUM LAWRENCIUM d. solid to liquid 2. Which element has exactly five electrons in the highest principal energy level (the outer shell)? a. B b. Ba c. P d. Mn 3. For a chemical reaction it is often found that the rate of reaction increases significantly as the temperature is increased. The occurs because a. the concentrations of the reactants increase b. more reactants collide with energy equal to or greater than the activation energy c. the concentrations of the products decrease d. the volume expands and there is more room for the products to form 4. Which substance does not obey the Lewis octet rule? a. O2 b. NO c. CO d. N2 5. For a calcium ion, Ca2+, with a mass number of 42, the number of protons, neutrons, and electrons is a. 20 protons, 22 neutrons, and 18 electrons. b. 20 protons, 42 neutrons, and 22 electrons. c. 20 protons, 42 neutrons, and 18 electrons. d. 22 protons, 20 neutrons, and 22 electrons. 6. Which of the following pairs of elements would have the most similar chemical properties? a. H and He b. F and He c. O and S d. Li and Mg 7. Which of the following tends to form a cation (positive ion) with a charge of 2+? a. Na b. O c. He d. Mg 8. Methane (CH4) can react with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). The balanced chemical reaction shows that, for every mole of methane reacted, the number of moles of water formed is: a. 1/2 b. 1 c. 2 d. 4 e. 8 9. The correct formula for Nitric Acid is: a. HNO b. H2NO3 c. HNO2 d. HNO3 10. Titanaium reacts with element X to form a compound with the formula TiX2. Element X exists as a solid at normal temperature and pressure. Element X must be a. Oxygen b. Sulfur c. Aluminum d. Calcium 11. How many moles of chloride ions are there in 1.0 L of 1.5 M MgCl2 (aq)? a. 1.0 moles b. 1.5 moles c. 2.0 moles d. 3.0 moles 12. What is the mass of 10 moles of CO2? a. 440 g b. 280 g c. 44 g Answers are on the following page Answers: 1a, 2c, 3b, 4b, 5a, 6c, 7d, 8c, 9d, 10b, 11d, 12a. d. 28 g The url for this document is http://www.chemistry.sfsu.edu/sample-chem-placement.html First published: 14 June 2005. Department of Chemistry & Biochemistry / contact us / revised 16 April 2012