Quiz3 A05 - # of bonding PAIRS of electrons:_____2____ # of...

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QUIZ 3 NAME (Last, First): __________________________ Chemistry 6A Fall 2008 UCSD PID: |A|__|__|__|__|__|__|__|__| Section A/E05 Your signature: _____________________________ Total Points: _______ / 20 You have 10 minutes 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. 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 ν E= ½ mv 2 1. Draw Lewis structures for the following compounds and indicate the correct number of bonding and lone PAIRS of electrons. (10pts.) OF 2 NH 2 CF 3 # of valence electrons: __20_______
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Unformatted text preview: # of bonding PAIRS of electrons:_____2____ # of lone PAIRS of electrons:______8______ # of valence electrons: ___32_____ # of bonding PAIRS of electrons:_____6____ # of lone PAIRS of electrons:______10______ 2. Name the following ions. (3 points) NO 2-: _____nitrite____________ ClO 3-: _______chlorate__________ CO 3-2 : _______carbonate__________ 3. Order the following compounds according to their expected lattice energies: LiCl, KCl, KBr, and MgCl 2 (2pt) ______KBr, KCl, LiCl, MgCl 2 _________________________ 4. Give the correct oxidation states: (3pt) Fe in FeCl 3 : _______3___________ C in CS2 _______4___________ B in BF 3 _______3___________ 5. Give the chemical formulas for for: (2pt) Potassium sulfide ________K 2 S_______________________________ Ammonium sulfate __________(NH 4 ) 2 SO 4 _____________________________...
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Quiz3 A05 - # of bonding PAIRS of electrons:_____2____ # of...

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