Asample of gas has an intial volume of 22.8 l at a pressure of 1.65 atm. if the sample is compressed to a volume of 10.7 l, what is its pressure? (assume constant temperature.)

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.

How are elements arranged in a periodic table

How does science use models to gain a better understanding of concepts?