Which of the following pairs of compounds have the same empirical formula? a. acetylene, C2H2, and benzene, C6H6 b. ethane, C2H6, and butane, C4H10 c. nitrogen dioxide, NO2, and dinitrogen tetroxide, N2O4 d. diphenyl ether, C12H10O, and phenol, C6H5OH

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mauvellama96Lv1

6 Oct 2020

Which of the following pairs of compounds have the same empirical formula?

a. acetylene, C₂H₂, and benzene, C₆H₆

b. ethane, C₂H₆, and butane, C₄H₁₀

c. nitrogen dioxide, NO₂, and dinitrogen tetroxide, N₂O₄

d. diphenyl ether, C₁₂H₁₀O, and phenol, C₆H₅OH

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Kenneth DuqueLv10

26 Oct 2020

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The hydrocarbons acetylene (C₂H₂) and benzene (C₆H₆) have the same empirical formula. Benzene is an “aromatic” hydrocarbon, one that is unusually stable because of its structure. (a) By using data in Appendix C, determine the standard enthalpy change for the reaction 3 C₂H₂(g) C₆H₆(l). (b) Which has greater enthalpy, 3 mol of acetylene gas or 1 mol of liquid benzene? (c) Determine the fuel value, in kJ/g, for acetylene and benzene.

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(a) Draw Lewis structures for ethane (C₂H₆), ethylene (C₂H₄), and acetylene (C₂H₂).

(b) What is the hybridization of the carbon atoms in each molecule?

(c) Predict which molecules, if any, are planar.

(d) How many σ and π bonds are there in each molecule?

(e) Suppose that silicon could form molecules that are precisely the analogs of ethane, ethylene, and acetylene. How would you describe the bonding about Si in terms of hybrid orbitals? Silicon does not readily form some of the analogous compounds containing π bonds. Why might this be the case?