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Exam 1-2.3 - B I,II C I IV D II III E all are true 11 The...

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EXAM I Sample Exam 1-2 Dr. V. Williamson © Vickie M. Williamson 2007, All Rights Reserved 2 9. How many significant figures should there be in the answer to the following problem? (29.2 — 20.0) (1.79 x 10 5 ) 1.39 A.2 B.3 C.1 D.5 E.4 10. Which of the following is (are) FALSE? I. Dalton was NOT the first person to describe atoms. II. The Thomson model of the atom contained negative electrons embedded in a positive mass. III. Rutherford’s positive particles were deflected by gold foil, showing that the gold atoms had a small dense negative center. IV. One mole of water contains more particles than one mole of magnesium. A. III, IV B. I,II C. I, IV
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Unformatted text preview: B. I,II C. I, IV D. II, III E. all are true 11. The table shown below lists the naturally occurring isotopes of element X. Use this data to calculate the average atomic mass of element X. Mass of Isotope Isotopic Abundance 15.33 amu 28.6% 17.26 amu 13.3% 18.11 amu 58.1% A. 17.65 B. 16.90 C. 17.20 D. 17.11 E. 15.33 12. What is the mass percentage of hydrogen in aspirin, C 9 H 8 4 ? A. 8.96% B. 0.555% C. 80.0% D. 38.1% E. 4.48% 13. Select the smallest atom from the following list. A. Rb B. Cl C. Fe D. P E. Na 14. Element G reacts with sodium to form an ionic compound with the formula Na 2 G. Element G is a member of group? A.X B.S C.R D.Y E.Z...
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