CHM 113 Midterm: Exam 3

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31 Jan 2019
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Multiple choice (4 points each): answer on blue form; be sure to code in your name and id: the bohr model of the atom works reasonably well in the calculation of energy levels in hydrogen. Sample exam 3: which of the following electronic configurations represents a diamagnetic atom, c. What is the charge on this chromium ion: a, 2, 3, 3, 2, 4, manganese is in the 2+ state. Sample exam 3: which one of the following molecules violates the octet rule for electron distribution around the central atom, b, sih4, sf4, cof2, s2cl2, pbr3, polarity of a bond depends on the electronegativity difference between atom centers. Which one of the following molecules has the bond with the greatest polarity: d, icl, ibr, iat, if, i2, using bond energies, calculate the heat of reaction, d. Bond energies: ch (414 kj/mol), f2 (155 kj/mol), cf (439kj/mol), hf (565 kj/mol: 510, -510, 1740, -1740, 435.

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