2. List the following in order of increasing ionization energy: Ca, N, Cs, F, and K.

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1 hemistry 11 Fall 2011 Examination #1 ANSWER KEY For the first portion of this exam, select the best answer choice for the questions below and mark the answers on your scantron. Pay attention to significant figures. Then answer the free response questions that follow (100 pts. total; multiple choice 2 pts. each). 1. Determine the expected electronic configuration for Ac +3 (Z = 89) A. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 4d 10 4p 6 5s 2 5d 10 5p 6 6s 2 6f 14 6d 10 6p 4 B. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 6 7s 1 D. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 10 5p 6 6s 2 4f 14 5d 10 6p 5 E. 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 4d 10 4p 6 5s 2 5d 10 5p 6 6s 2 6f 14 6d 10 6p 6 2. List the following in order of increasing ionization energy: a, N, s, F, and K. A. F < N < a < K < s B. N < F < K < a < s. s < K < a < N < F D. s < a < K < F < N E. K < s < a < N < F 3. Now rank the species in #2 above in order of increasing electronegativity. A. F < N < a < K < s B. N < F < K < a < s. s < K < a < N < F D. s < a < K < F < N E. K < s < a < N < F 4. ow many protons, neutrons, and electrons present in 186 W 3+? A. 183 protons; 186 neutrons; 74 electrons B. 183 protons; 74 neutrons; 186 electrons. 186 protons; 74 neutrons; 183 electrons D. 74 protons; 112 neutron; 77 electrons E. 74 protons; 112 neutrons; 71 electrons 5. What is the name of the following compound: u 2 S? A. copper sulfide B. copper(i) sulfide. copper(ii) sulfide D. copper(iv) sulfide E. dicopper monosulfide

2 6. The density of acetic acid is 1.05 g/ml. ow many ml are contained in 327 g of acetic acid? A x 10-3 ml B x 10-3 ml x 10 2 ml D x 10 2 ml E x 10 2 ml 7. The temperature required to melt Nal is 528. What is this temperature converted to Fahrenheit and Kelvin? A. -44 F and 231 K B. -0 F and 255 K. 491 F and 528 K D. 982 F and 801 K E F and 977 K 8. Two electronic balances are tested using a standard weight. The true mass of the standard is g. The results of 5 individual measurements on each balance are recorded below: Balance A: g, g, g, g, and g; average = g Balance B: g, g, g, g, and g; average = g Which statement best describes the results? A. A: good precision, good accuracy. B: good precision, good accuracy. B. A: good precision, good accuracy. B: poor precision, poor accuracy.. A: poor precision, good accuracy. B: good precision, good accuracy. D. A: poor precision, poor accuracy. B: good precision, good accuracy. E. A: poor precision, poor accuracy. B: good precision, poor accuracy. 9. Which of the following is/are chemical properties of iodine? I. Iodine is a purple solid at 25. II. Iodine reacts with sodium metal to form sodium iodide. III. The density of iodine is 4.93 g/cm 3. A. I only B. II only. III only D. I and II E. I and III

3 For Questions 10-13, consider the structure of Fluoxetine (or Prozac) below, a drug approved for the treatment of major depression, obsessive-compulsive disorder, bulimia nervosa, panic disorder, and premenstrual dysphoric disorder: F N 3 Fluoxetine (Prozac) 10. Select A for True R B for False regarding the following statement: Fluoxetine possesses resonance. 11. Select A for True R B for False regarding the following statement: Fluoxetine is considered an overall nonpolar molecule. 12. What is the molecular geometry around the oxygen atom? A. linear B. trigonal planar. bent D. trigonal pyramidal E. tetrahedral 13. Determine the approximate bond angle around the -N- bond? A. 90 B D. 180 E. annot be approximated

4 14. If the fuel efficiency of an automobile is 27 miles per gallon, what is its fuel efficiency in kilometers per liter? (1 km = mile, L = quarts, 4 quarts = 1 gallon) A. 11 km/l B. 14 km/l. 17 km/l D. 63 km/l E. 180 km/l 15. Which of the species below has the smallest radii? A. Mg B. Mg +. Mg 2+ D. Mg - E. Mg If 46.0 g of ethanol, 3 2, at 22.0 absorbs 1.45 kj of heat, what is the final temperature of the ethanol? The specific heat of ethanol is 2.44 J/g. A. 9.1 B D E ow many lone pair set of electrons, if any, surround the central atom in S 2? (Lone pairs on terminal oxygen atoms omitted for clarity) A. 0 B D. 3 E. 4 S S 18. Which statement concerning solid Nal (i.e., table salt) is expected to be TRUE? A. Nal is a chemical compound. B. Nal is a homogeneous mixture.. Nal is a heterogeneous mixture. D. Nal has properties identical to its component elements, sodium metal and chorine gas. E. Both A and B

5 19. Determine the correct answer to the following expression: 2.97 x x 10-3 A. 6.1 x 10-3 B x x 10-3 D x 10-3 E x 10-3 For Questions 20-25, match the vocabulary terms to their respective definitions/descriptions. A. sublimation B. atomic number (#25) B. deposition (#23) D. atomic mass. condensation DE. heat (#21) D. pure substance AB. metal E. element (#22) BD. nonmetal AB. mass number (#24) DE. metalloid (#20) 20. malleable, ductile, oxidizes, poor conductor of heat and electricity, and low melting point 21. energy that flows into or out of a system because of a difference in temperature between the system and its surrounding 22. a specific substance which cannot be decomposed into simpler substances by ordinary chemical means 23. conversion of matter from a gas into a solid with bypassing the liquid phase 24. the number of protons and neutrons in the nucleus of an atom 25. the number of protons in the nucleus of an atom 26. (6 pts.) Your physician orders 125 mg of medication per hour. The label on the IV bag reads 5 g/1000 ml. The set delivers 15 gtts/ml, where the unit "gtts" stands for drops of liquid. ow many ml should infuse each hour? The current flow rate is 10 gtts/min. Is this correct? If not, what is the correct flow rate?? = x x = 25 ml/hr Use the current flow rate provided in the problem, 10 gtts/min, to determine if equal to 25 ml/hr:? = x x = 40 ml/hr; since this is NT equal to 25 ml/hr, work backwards to determine what the flow rate should be:

6 = x x ; X = 6.25 gtts/min (or 6 gtts/min in a clinical setting) 27. (16 pts. total; 2 pts. each) Write the name/chemical formula for each of the following listed below: A. chromium(iii) sulfite r 2 (S 3 ) 3 B. aluminum phosphate AlP 4. PF 5 phosphorus tetrafluoride D. Ag 2 3 silver carbonate E. strontium hydroxide Sr() 2 F. ammonium acetate N G. zinc nitrate Zn(N 3 ) 2. N 2 dinitrogen monoxide (Exam ontinued on Next Page)

7 28. (28 pts. total) onsider each of the following ions/molecules shown below and write your final structures in the boxes provided: A. Beginning with the best Lewis dot structure, use VSEPR theory to draw each of the listed species, including resonance where appropriate. Don t forget to include lone pairs! B. Describe the geometry about EA central atom. Include both electronic and molecular geometries.. Give the approximate bond angle(s) around each central atom. D. Determine whether the overall species is ionic, polar, and/or nonpolar.

8 N 2 electronic geometries: (N) tetrahedral; (1) tetrahedral (2) trigonal planar; () tetrahedral molecular geometries: (N) trigonal pyramidal; (1) tetrahedral; (2) trigonal planar; () bent approx. bond angles: (N) 109.5; (1) 109.5; (2) 120; () polar or nonpolar? polar 1 Structure #1 l Structure #2 electronic geometry: tetrahedral molecular geometry: trigonal pyramidal approx. bond angle: polar or nonpolar? ionic; polar Structure #3 electronic geometry: trigonal planar molecular geometry: trigonal planar approx. bond angle: 120 polar or nonpolar? ionic; polar