Which conjunction about whole numbers is true?

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

What happens to the temperature of a substance when the average kinetic energy of its particles increases?

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?