Chemistry 1A - Fall 2002 - Final Exam

Chemistry 1A - Fall 2002 - Final Exam - Chemistry 1A, Fall...

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Chemistry 1A, Fall 2002 Final Exam, Version A December 11, 2002 (3 hours, closed book) Name: TA: SID: Section: Please read this first: Write your name and that of your TA on all pages; On the Scantron TM , bubble in Form A. Test-taking Strategy This test consists of two parts: multiple choice ( answers to be circled and entered on the Scantron sheet ) and short answer. In order to maximize your score on the exam: Do the questions you know how to do first. Then, go back and spend more time on the questions you find more challenging. Budget your time carefully -- don't spend too much time on one problem. Show all work for which you want credit and don't forget to include units. Page Score 10 11 12 13 14 SA Total MC Total
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Name_______________________ TA _________________________ Potentially Useful Information E=h ν λν = c λ deBroglie = h / p = h / mv E kin (e - ) = h ν - Φ = h ν - h ν o E kin = ½mv 2 E kin = 3RT/2 v rms = ( 3 /) R TM E n = -R (Z 2 /n 2 ) E = -R 2 2 2 - Z 2 /n 1 2 R = 2.18 × 10 -18 J k B = 1.381 × 10 -23 J/K m e = 9.11 × 10 -31 kg h = 6.626 × 10 -34 J s c = 3.0 × 10 8 m/s 1 nm = 10 -9 m 1 kJ = 1000 J 1 Torr = 1 mmHg 1 atm = 760 mmHg J = (kg m 2 )/s 2 1 eV = 1.602 × 10 -19 J PV = nRT MM = mRT / (PV) T(K) = T(C) + 273.15 R = 0.0821 L·atm / (mol·K) R = 8.314 J / (mol K) A = elC P a = X a P tot P = F/A E = q + w G ° = H ° - T S ° G = G ° + RT ln Q G ° = -RT ln K q = mC s T w = -P ext V H ° = Σ∆ H ° f (products) - Σ∆ H ° f (reactants) N A = 6.022 × 10 23 1 cal = 4.18 J 101.3 J = 1 L atm K a K b = K w K w = 10 -14 pX = -log X pK a + pK b = pK w pH = pKa + log - [] A HA Bond Energies (kJ/mol) C-H 412 N-H 388 H-H 436 N N 944 C-C 348 C=C 612 C C 837 C N 89
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Name_______________________ TA _________________________ Part I-Multiple Choice (4 pts each, 160 pts total) Bubble in the correct answer on your Scantron TM form AND circle your answer on the exam. There is only one correct answer for each question, so you should circle and fill in one and only one answer for each question. There is no penalty for an incorrect response. 1.) Which neutral atom could have the configuration 1s 2 2s 2 2p 6 3s 2 3p 4 4s 1 ? A) K C) Na D) Rb E) S 2.) What wavelength of light (in nm) is emitted by a hydrogen atom that undergoes a transition from n=4 to n=1? A) B) 365 C) 823 D) 1460 E) 240 3.) Which would be the mass spectrum of the products when acetylene (C 2 H 2 ) is burned in oxygen? A) B) C) D) E) 4.) An expansion of the mass spectral region around 44 mass units for the products of acetylene combustion in oxygen shows the following. What is the likely explanation of the peak at mass number 46? Presence of 13 C in acetylene burned. Presence of 18 O in the water formed. Presence of O in oxygen burned. Presence of 2 H in the water formed. None of these. 18 44 48 44 46
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Name_______________________ TA _________________________ 5.) What is the maximum number of electrons with the same spin quantum number (m s ) for the principle quantum number 3? A) 4 B) 8 C) D) 14 E) 19 6.) A longer wavelength of light is required to break an oxygen-oxygen bond in ozone (O 3 ) than the oxygen-oxygen bond in diatomic oxygen (O 2 ). Which of the following is the best explanation for this.
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This note was uploaded on 04/01/2008 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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Chemistry 1A - Fall 2002 - Final Exam - Chemistry 1A, Fall...

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