201F10Dex3 - Chem 201-01, 201-04 EXAM III November 9, 2010...

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Unformatted text preview: Chem 201-01, 201-04 EXAM III November 9, 2010 PRINT NAME SIGN NAME CIRCLE your recitation section in the list below. 201-01 A: W 9:00 NS 30 B: W 10:00 CB 16 C: W 12:00 CB 16 D: W 4:00 CB 16 201-04 A: M 8:00 NS 128 B: M 9:00 EH 112 C: M 12:00 NS 30 E: R 1:00 DO 202 SCORED GRADE: All answers should be with the correct significant figures. Atomic weights are provided in the Periodic Table. Those values must be used. The Periodic Table will not be collected. It may be used as scratch paper or as cover paper. PLEASE KEEP YOUR WORK COVERED. Be certain your answers are clear. If an answer is not clear, it can be considered wrong. Problems marked with ** in the margin are directly from the assigned homework. These total 39 points. Place your name in the space provided at the top of each question page. This helps to identify the pages if they are accidentally separated during grading and processing. Work promptly. Use your time effectively. SOME THINGS WHICH MAY OR MAY NOT BE USEFUL Electromagnetic Radiation c = IV = 3.00 X 108 m/s h = 6.626 x 10‘34J-s E = hv = hc/A . . -18 1 1 Trans1t10n Energy AE = —2.18 X 10 J ( 2 - 2) nfin nim't *‘k *9: 1. last name: (30 pts) Indicate whether each statement is true (T) or false (F). Be certain T or F is clearly indicated. A cold object can have more heat energy than a warm object. The standard reference elemental form for mercury is Hg(l). UV light has longer wavelengths than visible light. It takes more energy to remove the electron from the ground state of H than from the ground state of He+. Fluorescent lights involve electron excitation and relaxation. l = 0 is the only subshell type which is present in all shells. s orbitals are spherical. A d subshell can hold up to 14 electrons. 2. 3. It is easier to remove an electron from 23 than from 63. The valence electron in a potassium atom is held more strongly than the valence electron in a sodium atom. (5 pts) Circle the value for Aern (in kJ) for 2 NOCl(g) -. N2(g) + 02(g) + 012(3) given the following set of reactions: 1/2 N2(g) + 1/2 02(g) —o NO(g) AH = 90.3 kJ NO(g) + 1/2 Cl2(g) —> NOCl(g) AH = —38.6 kJ 116.2 97.5 70.8 55.9 36.1 17.4 ~23.1 —46.3 —62.9 —86.8 «103.4 —126.9 (3 pts) Rank the following photons in terms of decreasing energy. (You can enter the letters a, b, and c.) a. IR (v = 6.5 X 1013 s‘l) b. microwave (v = 9.8 X 1011 s"1) 0. UV (v = 8.0 x 1015 8—1) > > ** last name: 4. (2 pts) What (neutral) element's configuration ends in 4d3? (2 pts) Give the formula of one anion with [Ar] configuration. (2 pts) What element forms a 3+ cation which is isoelectronic with Br‘? (2 pts) What element in Period 6 forms a 3+ cation with pseudo-noble gas configuration? 5. (6 pts) Acetylene burns in air according to the following equation: + _. 2 + AHO : l'XIl Given AH ‘; of C02(g) = —393.5 kJ/mol and AH; of H20(g) = —241.8 kJ/mol, circle the value for AH ‘ti (in kJ/mol) for C2H2(g). 227.0 273.9 301.8 367.2 458.5 490.3 539.6 572.6 663.9 698.1 804.6 837.0 6. (6 pts) Give the box configuration for the valence electrons for P0 (Z = 84). (Valence only!) Be sure to include subshell labels. 7. (6 pts) Write the formation equation for CuSO4(s). ** *‘k ** last name: 8. (5 pts) Circle all of the following which are paramagnetic. Ca Ti2+ Zn Ga+ Se Br‘ 9. (7 pts) One of the inactive ingredients in Head & Shoulders Dandruff Shampoo is a compound with a zinc cation and an oxyanion. The molar mass of this compound is 125.39. What is the formula of this compound? (Another compound of zinc is listed as the active ingredient to fight dandruff; that's not the one for this question.) 10. (9 pts) Write the condensed (abbreviated) ground-state electron configuration of these transition metal ions. 003+ [ ] Hf2+ [ 1 11. (6 pts) Consider the transition in a hydrogen atom from n = 6 to n = 3. Circle the wavelength (in nm) of the photon which would be emitted. 227 293 308 362 454 477 547 616 724 908 1090 1 140 12. (3 pts) Arrange the atoms Cl, K and S in order of increasing atomic size: < < (3 pts) Arrange the atoms Be, F and C in order of decreasing IE 1: > > (3 pts) Arrange the ions Sr2+, Ba2+ and Cs+ in order of decreasing size: > > ...
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201F10Dex3 - Chem 201-01, 201-04 EXAM III November 9, 2010...

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