Exam 1-1.3 - radiation that has a wavelength of 0.0095...

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EXAM I Sample Exam 1-1 Dr. V. Williamson © Vickie M. Williamson 2007, All Rights Reserved 2 8. Which of the following are FALSE in whole or in Part? I. According to Dalton, who was the first person to describe atoms, atoms are only rearranged in chemical reactions. II. According to Bohr, the electrons moved only in precise paths around the nucleus, so that the Bohr configuration for potassium is 2)8)9). III. Bohr believed that electrons are in different energy levels surrounding the nucleus, because light of different colors was given off after the electrons of an excited hydrogen atom returned to ground state. IV. According to Rutherford since some positive particles bounced back when shot at gold foil, most of the mass of an atom is concentrated in its positively-charged nucleus. A. II and IV B. I and II C. III and IV D. II and III E. I and III 9. What is the energy (in J) of a photon of electromagnetic
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Unformatted text preview: radiation that has a wavelength of 0.0095 kilometers? A. 2.1 x 10-26 B. 2.0 x 10-23 C. 4.5 x 10 25 D. 2.7 x 10 9 E. 6.0 x 10-23 10. Which one of the following polyatomic ions has the same charge as the ion formed by sulfur? A. hydroxide B. phosphate C. acetate D. ammonium E. carbonate 11. The density of gold is 19.3 g/mL. Calculate the volume of 155 g of gold. A. 19.3 mL B. 136 mL C. 0.125 mL D. 8.03 mL E. 2.99 x 10 3 mL 12. The symbols for fluorine, silver, and sodium are: A. F, Ag, and Na B. F, Si, and So C. F, Ag, and So D. F, Si, and Na E. Fl, Sr, and Na 13. What is the empirical formula for a compound that is 29% by weight Na, 41% S, and 30% 0? A. NaSO 3 B. NaSO 2 C. Na 2 S 2 3 D. Na 3 S 4 O 3 E. NaSO 14. How many molecules of CH 4 are in 48.2 g of this compound? A. 2.00 X 10 23 B. 48.2 C. 3.01 D. 1.81 x 10 24 E. 5.00 x 10 —24...
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This note was uploaded on 02/18/2012 for the course CHEM 101 taught by Professor Williamson during the Fall '08 term at Texas A&M.

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