CHEM 1004 Final Exam Fall 2010

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1 Name CHEM 1004 Final Exam Fall 2010 Circle the letter corresponding to the best choice for each of the following multiple choice questions. Each question is worth 2 points. 1. Which of the following would constitute a chemical change? a. the combustion of gasoline to drive your car b. the cutting of a piece of wood into two pieces c. the water in a pot on the stove boils and evaporates d. a balloon is inflated from a helium cylinder e. a nail is bent while hammering it into a piece of wood 2. A small amount of table salt is dissolved in water. The resulting solution is an example of: a. pure substance, element b. pure substance, compound c. homogeneous mixture d. heterogeneous mixture e. pure substance, homogeneous mixture 3. Which of the following is a method for expressing the prefix milli-? a b c d e cm = km a b c d e How many mm are in 1.0 cm? a b. 100 c. 10 d. 1 e How many mm 2 are in 1.0 cm 2? a b c. 100 d. 1 e Based upon your extensive research into the periodic table and the history of its development, the individual most associated with the development of the current periodic table is: a. Goldstein b. Rutherford c. Thomson d. Bohr e. Mendeleev Page 1 of 7

2 8. Again, based upon your extensive research into the periodic table and the history of its development, the time period most associated with the initial development of the current periodic table is: a s b s c s d s e s 9. An neutral atom of the isotope of phosphorous that has a mass number of 32 contains protons, neutrons, and electrons. a. 15, 32, 15 b. 15, 17, 15 c. 17, 15, 17 d. 15, 17, 20 e. 17, 32, An ion of an isotope of oxygen with a mass number of 18 has a charge of -2. The ion contains protons, neutrons, and electrons. a. 10, 8, 8 b. 8, 10, 10 c. 8, 10, 8 d. 8, 10, 6 e. 10, 8, The electron configuration for Si is given as: a. 1s 2 2s 2 2p 6 3s 2 b. 1s 2 2s 2 2p 6 3s 2 3p 1 c. 1s 2 2s 2 2p 6 3s 2 3p 3 d. 1s 2 2s 2 2p 6 3s 1 3p 2 e. 1s 2 2s 2 2p 6 3s 2 3p How many valence electrons are in an atom of Sn? a. 0 b. 1 c. 2 d. 3 e Which of the following is the halogen family on the periodic chart? a. Group 1 b. Group 2 c. Group 6 d. Group 17 e. Group Which of the following is a transition metal? a. Ru b. As c. Ba d. In Po Page 2 of 7

3 15. The nitrate ion has the following formula: a. NO 2 2- b. N 3- c. NH 3 d. NO 3 - e. NO The compound Mg 3 (PO 4 ) 2 is named: a. magnesium phosphide b. trimagnesium diphosphide c. magnesium diphosphate d. magnesium phosphate e. manganese phosphate 17. The compound SO 3 is named: a. sulfur trioxide b. sulfur oxide c. sulfur tetroxide d. sulfite e. trisulfur oxide 18. When the following equation is balanced, the coefficient of Li(s) is: Li (s) + N 2 (g) Li 3 N (s) a. 1 b. 2 c. 3 d. 5 e When the following equation is balanced, the coefficient of O 2 (g) is: C 5 H 10 O 2 (l) + O 2 (g) CO 2 (g) + H 2 O (g) a. 1 b. 3 c. 5 d. 10 e Molecules moving rapidly in random directions, separated by a relatively distance, and not experiencing any forces between them except at collision is a description of which state of matter? a. gas b. liquid c. solid d. plasma e. gel Page 3 of 7

4 21. Which of the intermolecular forces are important the compound CH 3 F? a. dispersion b. dispersion and dipole-dipole c. dispersion and hydrogen bonding d. dispersion, dipole-dipole, and hydrogen bonding e. dipole-dipole and hydrogen bonding 22. Which of the following oxides would produce an acid when dissolved in water? a. tin (IV) oxide b. aluminum oxide c. carbon dioxide d. magnesium oxide e. barium oxide 23. If the ph of a solution is 3.5, the closest value to the hydrogen ion concentration is: a M b M c M d M e M 24. Which of the following is NOT a definition of an oxidation process? a. a gain of oxygen b. a loss of hydrogen c. a gain of electrons d. a loss of electrons e. an increase in ion charge 25. Pentane has several isomers. The structure for pentane where all of the carbons are in a line is: a. CH 3 CH 3 b. CH 3 CH 2 CH 3 c. CH 3 CH 2 CH 2 CH 3 d. CH 3 CH 2 CH 2 CH 2 CH 3 e. CH 3 CH 2 CH 2 CH 2 CH 2 CH 3 Page 4 of 7

5 Short answer and problems. Show your work to receive partial credit. Point totals are indicated in parentheses to the right of each problem number. 26. (6 points) Answer each of the following questions. Show your work. a. How many grams are in 3.45-mol of H 2 O? b. How many atoms of Cl are in 500 molecules of CH 2 Cl 2? c. How many moles of CH 4 are in g of CH 4? 27. (5 points) Fill in the missing information on the underlines in the table below. Formula CuNO 3 P 2 O 5 Name sodium chloride iron (III) oxide sulfur hexafluoride 28. (4 points) What is the pressure of 2.0-mol of He gas confined to a volume of 45.0-L at a temperature of 350 K? Important equations are available toward the back of the test. Page 5 of 7

6 29. (6 points) Draw Lewis structures for the following molecules. a. CHF 3 b. NCl 3 c. NO ( 4 points) Complete each of the following nuclear reactions by filling in the missing particle. Au Ir U n Y 3 n (2 points) A piece of wood from an Egyptian tomb has carbon-14 activity of 490 counts/hour. A piece of new wood of the same size gave 3920 counts/hour. What is the age of the wood from the tomb? The half-life of 14 C is 5730 years. Page 6 of 7

7 Potentially useful information: PV = nrt R = L atm/mol K Page 7 of 7

CP Chemistry Final Exam Review

I. Matter and Measurement 1) Chemical or physical property? CP Chemistry Final Exam Review Diamond is a very hard substance. The density of aluminum is 2.7 g/cm 3. Zinc reacts with acid. Copper melts at