a-) In 1954 Linus Pauling was awarded the Chemistry Nobel Prize for his work on the nature of the chemical bond. Covalent bonds are one example of intramolecular bonding. Explain the formation of the following: i) [tex] \sigma [/tex] (sigma) bonding ii) [tex] \pi [/tex] (pi) bonding iii) double bonds iv) triple bonds b-) Atomic orbitals can mix by hybridization to form new orbitals for bonding. Identify the type of hybridization present in each of the three following molecules Deduce and explain their shapes: i) [tex] OF_2 [/tex] ii) [tex] H_2 CO [/tex] iii) C_2 H_2 c-) Three scientists shared the Chemistry Nobel Prize in 1996 for the discovery of the fullerenes. Fullerenes, like diamond and graphite, are allotropes of the element carbon. i) State the structures of and the bonding in diamond and graphite ii) Compare and explain the hardness and electrical conductivity of diamond and graphite iii) Predict and explain how the hardness and electrical conductivity of C60 fullerene would compare with that of diamond and graphite. I have already solved a-) i and ii but not iii and iv I have solved b-) i and ii but not iii and I couldn't solve c-) at all. I ask members for full solutions so I can learn how to write complete proper chemistry solutions. Of course, that doesn't mean that I ask you to solve each i, ii and iii for each question. Your help will be appreciated.