The letter n may be used in front of pentane in order to differentiate the normal straight-chain pentane from its isomers.
"n-pentane." YourDictionary, n.d. Web. 21 June 2018. <http://www.yourdictionary.com/n-pentane>.
n-pentane. (n.d.). Retrieved June 21st, 2018, from http://www.yourdictionary.com/n-pentane
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