27. Gasoline has a chemical formula of C8H18. If burned with air, it converts to water and carbon dioxide. How many oxygen molecules (O₂) are needed in this chemical reaction? a. 16 b. 18 28. Which is not considered as a hydorcarbon? a. Methane b. Acetylene C. 25 d. C. d. Answer is not among the choices C. d. Benzene Methanol 29. Detetrmine the formula mass, in amu, of diesel, C12H23. a. 147.31 b. 157.31 167.31 Answer is not among the choices

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Alkanes and Cycloalkanes

Alkanes are saturated organic compounds which are made up of C and H atoms. Alkanes have the general formula of CnH2n+2. Alkane contains sp3 hybridized carbon atoms with four sigmas (σ) bonds & every hydrogen atom is connected with one of the carbon atoms. The size of the alkane could be determined by the number of carbon atoms located in it.