Ch.7 - Covalent Bonding and Electron-Dot Structures
Chapter 7, Problem 134
What is the difference between a covalent bond and an ionic bond?
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Related Practice
Textbook Question
The dichromate ion, Cr2O72-, has neither Cr¬Cr nor
O¬O bonds.
(a) Taking both 4s and 3d electrons into account, draw an
electron-dot structure that minimizes the formal charges
on the atoms.
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Textbook Question
Calculate an approximate heat of combustion for ethane (C2H6) in kilojoules by using the bond dissocation energies in Table 9.3. (The strength of the O'O bond is 498 kJ/ mol, and that of a C ' O bond in CO2 is 804 kJ/mol.)
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Textbook Question
Use the data in Table 9.3 to calculate an approximate ∆H° in kilojoules for the synthesis of hydrazine from ammonia: 2 NH3(g) + Cl2(g) → N2H4(g) + 2 HCl(g)
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Textbook Question
The reaction S81g2 S 4 S21g2 has ΔH° = + 237 kJ
(b) The average S ¬ S bond dissociation energy is 225 kJ/mol. Using the value of ΔH° given above, what is the S ' S double bond energy in S21g2?
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Textbook Question
When 0.500 mol of N2O4 is placed in a 4.00-L reaction vessel and heated at 400 K, 79.3% of the N2O4 decom- poses to NO2.
(b) Draw an electron-dot structure for NO2, and rational- ize the structure of N2O4.
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