final-09A - SCC Chemistry 110/ UCD Workload 41C Fall 2009...

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SCC Chemistry 110/ UCD Workload 41C Name _____________________ Fall 2009 Section Number _____ Final Exam Form A Instructions: 1. You will need a Scantron, pencil, and calculator for this exam. Sharing of calculators is not permitted. A phone may NOT be used as a calculator. 2. Please write your name and test form on your Scantron. Please write your name on this exam 3. Look through the attached pages and notice that the last pages of the exam include scratch paper, a page of constants and formulas, and a periodic table. You may remove these sheets while you are taking the exam. No other notes, tables, or memory aids may be used on the exam. 4. You may write on this exam. 5. When you are finished, please turn in your exam, Scantron, and scratch paper. Good Luck and Good Skill
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1 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1. What type of pure substance can be decomposed chemically into other pure substances? A. A compound B. An element C. A mixture D. A solution E. Heterogeneous matter 2. A sample of an experimental medication was calculated to contain 0.392 g of active drug. How many μ g is this? A. 392 μ g B. 0.000392 μ g C. 3.92 x 10 4 μ g D. 3.92 x 10 5 μ g E. 3.92 x 10 6 μ g 3. Which characteristics correctly describe a proton? A. approximate mass 1 amu; charge +1; inside nucleus B. approximate mass 5 x 10 -4 amu; charge -1; outside nucleus C. approximate mass 5 x 10 -4 amu; charge +1; inside nucleus D. approximate mass 1 amu; charge 0; inside nucleus E. approximate mass 1 amu; charge +1; outside nucleus 4. Add 2.33x10 3 to 4.16 x 10 2 and express the answer in scientific notation. A. 2.75 x 10 2 B. 2.75 x 10 3 C. 27.5 x 10 2 D. 4.39 x 10 2 E. 4.39 x 10 3 5. Magnesium is one of the least dense elements ( d = 1.74 g/cm 3 ). What is the volume of a 10.0 g sample of the metal? A. 5.75 cm 3 B. 10.0 cm 3 C. 17.4 cm 3 D. 57.5 cm 3 E. 174 cm 3 6. Atoms of Cl 35 17 contain ____ protons and _____ electrons. A. 17,17 B. 17,18 C. 18,17 D. 35,18 E. 35,17
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2 7. Which of the following statements is false ? A. The proton and the neutron are primarily responsible for the mass of an atom B. The charge on electrons and protons are equal in magnitude but opposite in sign C. The mass of a proton and a neutron are approximately the same D. The mass of a proton is approximately one gram E. A neutron, as its name suggests, is electrically neutral 8. The nuclear symbol of an isotope of beryllium is 4 10 Be . Indicate the number of protons, number of neutrons, atomic number, and mass number of the isotope. Number of protons
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final-09A - SCC Chemistry 110/ UCD Workload 41C Fall 2009...

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