Provide a neatly drawn plot of energy versus dihedral angle for rotation around the C2-C3 bond of butane. 
Definitions:
Club Mosses
A phylum of seedless vascular plants with a life cycle similar to that of ferns.
Horsetails
Fern relatives with hollow, jointed stems, to which tiny leaves (reduced megaphylls) are attached in whorls.
Haploid
A term referring to a cell that contains a single set of chromosomes, typical of gametes.
Gametophyte Generation
The n, gamete-producing stage in the life cycle of a plant. Compare with Sporophyte Generation.
Q10: The most stable conformation of an alkane
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Q72: Provide a Newman projection of the most
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Q82: Conformation B is represented by Roman numeral
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