What are the names of the structures in the lungs where gas exchange accuse ?

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

Temperature is _related to the average kinetic energy of a gas. inversely directly not disproportionally

According to each substances heat of fusion, which of the items below requires more heat to be added per gram of substance to go from solid to liquid? silver sulfur water lead