Draw the structures of cyclohexane and benzene. Show all hydrogen atoms. Cyclohexane, C6H12 (six C in a ring) Benzene, C6H6 (six C in a ring)

See attached picture.

Explanation:

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In this case, considering that the cyclohexane has six carbon atoms and therefore twelve hydrogen atoms in its structure because it has no double bonds unlike benzene which actually has three and therefore it has six carbon atoms but six hydrogen atoms, on the attached picture, you will see the structure of both hydrocarbons as required, considering that each carbon atom must have four bonds in order to complete the corresponding octets.

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.