Which of the following compounds forms a covalent network solid? A)C₈H₁₈ B)NO₂ C)SiO₂ D)SnCl₄

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Covalent network solids are characterized by a network of covalent bonds, resulting in a very large macromolecule or lattice structure. The compound that fits this description is SiO2 (silicon dioxide), represented by choice C. The other compounds are not covalent network solids. Choice A seems to be a made-up compound, and choices B and D are molecular compounds with relatively low melting/boiling points.

Which of the Following Compounds Forms a Covalent Network Solid