Practice Exam1 (1-4) - CHEM 1411 Practice Exam #1 (Ch. 1-4)...

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CHEM 1411 Practice Exam #1 (Ch. 1-4) Name: Score Part I. Multiple choice questions. ( 2 points each) Direction- Please write your correct choice in space provide. ____1. The distance between carbon atoms in ethylene is 134 picometers. Which of the following express the distance in meters? A. 1.34x10 -13 m B. 1.34x10 -10 m C. 1.34x10 -7 m D. 1.34x10 -6 m ____ 2. Acetic acid boils at 244.2 0 F. What is boiling point in degrees celsius? A. 167.7 0 C B. 153.4 0 C C. 117.8 0 C D. 103.7 0 C ____ 3. Which of the following expressed measurement 52,030.2 m in correct scientific notation? A. 5.20302x10 4 m B. 5.203x10 4 m C. 5.20x10 4 m D. 5.2x10 4 m ____ 4. Select the answer with correct number of decimal places for the following sum. 4.65 g + 2.0 g + 19.6442 g = A. 26.2942 g B. 26.29 g C. 26 g D. 26.3 g ____ 5. Which of the following is a non-metal? A. Li B. Be C. Os D. I ____ 6. Bromine is the only non-metal that is liquid at room temperature. Consider the isotope bromine-81, 35 81 Br. Select the combination which list the correct atomic number, neutron number , and mass number respectively. A. 35,46,81 B. 35,81,46 C. 81,46,35 D. 46,81,35 ____ 7. Which of the following name is correct for given chemical formula? A. I 2 O 5 , iodine pentoxide B. LiNO 3 , lithium nitrate C. PbO , lead(I) oxide D. H 2 SO4 , hydrosulfuric acid ____ 8. Which of the following chemical formula is not correct for given chemical name? A. ferric oxide , Fe 2 O 3 B. calcium hydroxide , Ca(OH) 2 C. tetrasulfur dinitride , S 4 N 2 D. potassium chlorite , KClO 3 ------9. What is sthe coefficient on H 2 O when the following equation is correctly balanced 1
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NH 4 NO 2 ----> N 2 + H 2 O A. 1 B. 2 C. 3 D. 5 -----10. Which one of the following reactions is not balanced? A. 2C 6 H 6(l) + 15O 2(g) 12CO 2(g) + 6H 2 O (g) B. B 2 O 3(s) + 6HF (l) 2BF 3(g) + 3H 2 O (l) C. UO 2(g) + 4HF (l) UF 4(s) + 4H 2 O (l) D. 2B 5 H 9(l) + 12O 2(g) 5B 2 O 3(s) + 9 H 2 O (g) ____11. Which identification is INCORRECT for the element? A. Na, sodium
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This note was uploaded on 05/05/2010 for the course CHEM 22726 taught by Professor Shaikh during the Spring '10 term at University of Houston - Downtown.

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Practice Exam1 (1-4) - CHEM 1411 Practice Exam #1 (Ch. 1-4)...

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