Geodesic
The chemical formula C_{n}h_{2n+2) and its mathematical background
The Teaching of Mathematics, XI (2008) no. 2, p. 53 Cet article a éte moissonné depuis la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

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Already in the elementary school, on the chemistry classes, students are told that the general formula of alkanes is $C_nH_{2n+2}$. No proof of this claim is offered, either then or at any higher level. We now show how this formula can be proven in a mathematically satisfactory manner. To do this we have to establish a number of elementary properties of the mathematical objects called trees.
Classification : 05C05 05C90 K34
Keywords: Graph Theory, Trees, Chemistry, Alkanes. 
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     author = {Ivan Gutman},
     title = {The chemical formula {C_{n}h_{2n+2)} and its mathematical background},
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Ivan Gutman. The chemical formula C_{n}h_{2n+2) and its mathematical background. The Teaching of Mathematics, XI (2008) no. 2, p. 53 . http://geodesic.mathdoc.fr/item/TM2_2008_XI_2_a0/