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Quiz4 A05 - ν E= ½ mv 2 1 Rank in order of increasing...

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Chemistry 6A Fall 2008, Discussion Section A 09 QUIZ 3 UCSD PID: |A|__|__|__|__|__|__|__|__| E-mail: [email protected] Printed Last Name: ________________________________ Printed First Name: ________________________________ Signature: ________________________________________ Total Points: _______________ / 20 You have 10 mins to complete this quiz. Please show all your work, but write the answers in the designated spaces. The points allotted for each question are indicated in parenthesis. Include all units where appropriate! Potentially Helpful Constants: Mass of electron, m e = 9.10938 x 10 -31 kg Mass of proton, m p = 1.67262 x 10 -27 kg Mass of neutron, m n = 1.67493 x 10 -27 kg Fundamental charge, e = 1.60218 x 10 -19 C g = 9.80665 m s -2 c = 2.99792 x 10 8 m s -1 h = 6.62608 x 10 -34 J s Potentially Helpful Conversion Factors: 1 J = 1 N•m 1 N = 1 kg m s -2 1 L = 10 3 cm 3 Potentially Helpful Equations: E K = 1/2mv 2 E p = q 1 q 2 4 πε 0 r E p = mgh c = νλ E= h
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Unformatted text preview: ν E= ½ mv 2 1. Rank in order of increasing property. (2 points) Bond length (H-Br, H-F, H-I, H-Cl): ____HF, HCl, HBr, HI_____________ Polarity (H-Br, H-F, H-I, H-Cl): ____HI, HBr, HCl, HF_____________ 2. Fill in the chart. (7 points) VESPR formula Molecular geometry Molecular angle(s) AX 2 Linear 180 AX 4 Tetrahedral 109.5 AX 3 Trigonal Planar 120 What’s the VESPR formula of CH 3 Cl: AX 4 What’s the VESPR formula of CO 2 : AX 2 3. There are 3 Lewis structures for NCS-. Please complete these structures by drawing the correct number of electrons for each atom and the correct number of bonds between atoms, if necessary. (6 pts.) Which structure would be the most important and why? (2 pts)-Minimize formal charge on each atom. (3 rd is eliminated)-Negative formal charge prefers the atom with the highest ionization energy (N) PERIODIC TABLE OF THE ELEMENTS...
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