Which material is structurally distinct: graphite; silicon dioxide; or propane?

1 Answer
anor277
Dec 8, 2015

Graphite!

Explanation:

Graphite is a non-molecular structure, that features C-CC−C bond angles of 120""^@120∘. While there are 120""^@120∘ bonds in acetic acid, there are 2 rather than 3 such bonds. Propane and silicon dioxide are base on tetrahedra. Of course propane is MOLECULAR, whereas the other materials are NON-MOLECULAR.

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