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Unformatted text preview: CHE 131 Exam 1 Fall 2007 Multiple Choice, 4 points each Bubble in the letter of the one choice that best completes the statement or answers the question. No credit will be given for multiple answers. ____ 1. How many of the following name/formula combinations are both proper and unambiguous? Name Formula sodium chlorite NaCl aluminum(III) nitrate Al(NO 3 ) 3 carbon monoxide CO 2 iron(III) phosphate FePO 4 copper oxide Cu 2 O sulfur hexafluorine SF 6 A. 0 B. 1 C. 2 D. 3 E. 4 ____ 2. What is the molar mass of nitric acid? A. 48 g/mol B. 79 g/mol C. 31 g/mol D. 63 g/mol E. 47 g/mol ____ 3. What is the best chemical name of Cl 2 O 7 ? A. chlorine oxide B. dichlorine oxide C. dichlorine pentoxide D. chlorine heptoxide E. dichlorine heptoxide Form A, Page 1 of 7 ____ 4. All of the following have 36 electrons except A. 85 Rb + B. 80 Br – C. 84 Kr 2+ D. 87 Sr 2+ E. 79 Se 2– ____ 5. Which of the following is an alkaline earth metal? A. Rb B. Cs C. Ba D. V E. Y ____ 6. What is the proper value of the following expression written with the correct number of significant figures? (1.703 + 0.0021)/0.450 A. 3.77432 B. 3.78 C. 3.79 D. 3.80 E. 3.789111 ____ 7. Which of the following statements is true about ozone? A. Ozone is an allotrope of the element oxygen B. Ozone is an isotope of the element oxygen C. Ozone is an isomer of water D. Ozone is a mixture of dioxygen and trioxygen E. Ozone is a mixture of all known isotopes of the element oxygen Form A, Page 2 of 7 ____...
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- Fall '08
- Chemistry, d., A., B., c., E.