Which of the following is a postulate of the kinetic-molecular theory of gases? (1) The distance between gas molecules is large in comparison to their size. (2) At a given temperature, all gases have the same average velocity. (3) Gas molecules are in constant, random motion.

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.

How many atoms are in 2 moles of phosphorus