Two compounds with the same formula, S2F2, have been isolated. The structures are shown below. Molecule A Molecule B

Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. (Be sure your answers are consistent with the formal charges on the formulas.) The number of unshared pairs at atom a is со b The number of unshared pairs at atom b is H3C CH3 The number of unshared pairs at atom c is The number of unshared pairs at atom a is b H3C- The number of unshared pairs at atom b is CCH2 The number of unshared pairs at atom c is

Calculate the Enthalpy Change (ΔH) from average bond energies, which have been listed below in KJ/mol, for the following reaction and identify the nature of the reaction: CH3COOH + CH3OH → CH3COOCH3 + H2O [C‒H: 413; C‒C: 347; C=O: 745; C=C: 614; Cl‒Cl: 239, C‒O: 358; O‒H: 467]

How many different structural isomers are there for octahedral molecules with the general formula  AX2Y3 if A is the inner atom and there are no X-Y, X-X and Y-Y bonds?

Write the names of the molecules whose explicit structures are given below, according to the naming system. Write the open structures of the named compounds NH2 NO2 "Br O,N d) соон CH3 a) COOH b)

The partial Lewis structure that follows is for a hydrocarbonmolecule. In the full Lewis structure, each carbon atomsatisfies the octet rule, and there are no unshared electronpairs in the molecule. The carbon—carbon bondsare labeled 1, 2, and 3. (a) How many hydrogen atomsare in the molecule? (b) Rank the carbon–carbonbonds in order of increasing bond length. (c) Whichcarbon—carbon bond is the strongest one?

Empirical formulas for: C2H6 N2O4 C4H6O2 NH3

What is the skeletal structure for the following molecule: (CH3)2C═CH(CH2)4CH3

Unshared, or lone, electron pairs play an important role in determining the chermical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. Be sure your answers are consistent with the formal charges on the formulas. The number of unshared pairs at atom a is The number of unshared pairs at atom b is HyC CH The number of unshared pairs at atom e is The number of unshared pairs at atom a is The number of unshared pairs at atom b is HC CH The number of unshared pairs at atom e is

(a) Determine the formal charge of oxygen in the following structure. If the atom is formally neutral, indicate a charge of zero. (b) Draw an alternative Lewis (resonance) structure for the compound given in part (a). Show the unshared pairs and nonzero formal charges in your structure. Don't use radicals. Formal charge on O 0