How do I find the formula for Phosphorus Tetroxide

Which of the following statements is not true? • a. covalent compounds have low melting and boiling points. • ob. covalent bonds between atoms of a compound are relatively weak compared to bonds between molecules. • c. covalent bonds occur between nonmetals. • d. covalent compounds are often gases or liquids.

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Can you me with this i really appreciate it