CHEM31EX2FormulaSheet2011

CHEM31EX2FormulaSheet2011 - electrons) Bond Order: B.O. =...

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CONSTANTS AND CONVERSIONS Avogadro’s number: N A = 6.02214 x 10 23 mol -1 Gas Constant: R = 0.08206 L atm K -1 mol -1 = 8.314 J K -1 mol -1 Planck’s constant: h = 6.62608 x 10 -34 J s Speed of light: c = 2.9979 x 10 8 m s -1 Rydberg constant: R H = 2.178 x 10 -18 J 0 o C = 273.15 K 1 L atm = 101.325 J 1 atm = 760 mm Hg = 760 torr = 1.01325 x 10 5 Pa 1 amu = 1 g mol -1 = 1.6605 x 10 -27 kg FORMULAS Lattice Energy = k Q 1 Q 2 r " # $ % ' " H = D # (bonds broken) $ D # (bonds formed) Formal Charge: FC = (# valence electrons in free atom) – (# nonbonding electrons) – 1/2(# bonding
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Unformatted text preview: electrons) Bond Order: B.O. = 1/2(# electrons in bonding MOs - # electrons in antibonding MOs) = Qr Order of MO energy levels for 2 nd row homonuclear diatomics (including core electrons): Li 2 through N 2 : ! 1 s < 1 s * < 2 s < 2 s * < " 2 p < 2 p < 2 p * < 2 p * O 2 through F 2 : 1 s < 1 s * < 2 s < 2 s * < 2 p < 2 p < 2 p * < 2 p *...
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