chem1A-spring03-mt2-Kubinec-exam

chem1A-spring03-mt2-Kubinec-exam - Chemistry 1A, Spring...

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Page 1 Chemistry 1A, Spring 2003 Midterm 2, KUBINEC March 10, 2003 (90 min, closed book) Name:___________________ SID:_____________________ TA Name:________________ section number This exam has 45 multiple choice questions. Fill in the Scantron form AND circle your answer on the exam. Each question is worth 3.33 points. Note: THE QUESTIONS ON THIS EXAM MAY BE ANSWERED IN ANY ORDER. QUESTIONS THAT CONTAIN ‘(MARK ALL THAT APPLY)’ MAY REQUIRE MORE THAN ONE ANSWER TO BE BUBBLED IN TO RECIEVE CREDIT.
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Page 2 Potentially useful relations: 800 600 400 200 IR Red Green Blue UV Wavelength (nm) Color and Wavelength of Light compound G° (kJ / mol) CO 2 -394.36 H 2 O (g) -228.57 C 6 H 12 O 6 -910 O 2 0 G° of Formation N 0 = 6.02214 x 10 23 mol -1 R = 2.179874 x 10 -18 J R = 3.28984 x 10 15 Hz k = 1.38066 x 10 -23 J K -1 h = 6.62608 x 10 -34 J s m e = 9.101939 x 10 -31 kg c = 2.99792 x 10 8 m s -1 Gas Constant: R = 8.31451 J K -1 mol -1 R = 8.20578 x 10 -2 L atm K -1 mol -1 T (K) = T (C) + 273.15 F = 96,485 C / mol 1 V = 1 J / C 1 nm = 10 -9 m 1kJ = 1000 G ° = H ° - T S ° H ° = Σ H ° f (products) - Σ H ° f (reactants) S ° = Σ S ° (products) - Σ S ° (reactants) G ° = Σ G ° f (products) - Σ G ° f (reactants) S = k B lnW for aA + bB cC + dD b a d c B A D C Q ] [ ] [ ] [ ] [ = At equilibrium, Q = K G ° = - RTln K R S T R H K ° + ° = 1 ln G ° = - nF Є º pX = - log X ] [ ] [ log HA A pK pH a + = E = h ν λν = c λ deBroglie = h / p = h / mv E kin (e-) = h ν - Φ = h ν - h ν 0 = R n Z E n 2 2 PV = nRT RT E kin 2 3 = M 3RT v rms = E = q + w w = - P ext V T nR E = 2 3
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Page 3 S ECTION 1: P ERIODIC P ROPERTIES 1.) Which is the proper ordering of the following elements from lowest ionization energy to highest? A) Na, Mg, Si, S, Ar B) Ar, Na, Si, S, Mg C) Ar, S, Si, Mg, Na D) Mg, Na, Si, Ar, S E) Si, S, Ar, Na, Mg 2.) Which is the proper ordering of the following elements from smallest atomic radius to largest? A) Na, Mg, Si, S, Ar B) Ar, Na, Si, S, Mg C) Ar, S, Si, Mg, Na D) Mg, Na, Si, Ar, S E) Si, S, Ar, Na, Mg 3.) Which species has the highest ionization energy? A) Br 1- B) Kr C) Sr 2+ D) Rb + E) Se 2- 4.) From which orbital must an electron be removed from the Sr 2+ ion in its ground state to form Sr 3+ ? A) 5s B) 4s C) 5p D) 4p E) 3d S ECTION 2: M OLECULAR S TRUCTURE AND B ONDING The following eight questions refer to the complete Lewis structure for the cyanide ion (CN 1- ). 5.) What is the formal charge on the carbon? A) -3 B) -1 C) 0 D) 1 E) 2 6.) What is the formal charge on the nitrogen?
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chem1A-spring03-mt2-Kubinec-exam - Chemistry 1A, Spring...

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