chem1A-fall03-mt1-Head_Gordon-soln

chem1A-fall03-mt1-Head_Gordon-soln - Chemistry 1A, Fall...

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Page 1 Chemistry 1A, Fall 2003 Midterm 1 Sept 16, 2003 (90 min, closed book) Name:___________________ SID:_____________________ TA Name:________________ This exam has 38 multiple choice questions. Fill in the Scantron form AND circle your answer on the exam. Each question is worth 4 points. Note: The questions on this exam do not depend on each other. They may be answered in any order. All the questions are equally weighted. Answer those you can quickly and go back to those that require more thought. Some questions may seem obvious or too simple. They are. There are no ‘trick’ questions. Questions that contain ‘mark all that apply’ may require you to mark more than one answer to get credit for that question.
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Page 2 Potentially useful relations: 800 600 400 200 IR Visible 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 J 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 p = mv E kin = ½ mv 2 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: S TOICHIOMETRY 1.) What is the coefficient of oxygen in the balanced combustion reaction of one (1) mole of acetone (C 3 H 6 O)? C 3 H 6 O + O 2 CO 2 + H 2 O A) 1 B) 2 C) 3 D) 4 E) 5 For the next four questions consider a gaseous hydrocarbon X which contains only carbon and hydrogen. It has a relative molar mass 2.25 times greater than molecular oxygen.
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chem1A-fall03-mt1-Head_Gordon-soln - Chemistry 1A, Fall...

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