Can someone please help me i will marl brainliest

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What two categories of toxins were present in the air at dish, texas as a result of the gas pipelines that pass through the area