23What are 2 methods that scientists use to understand the history of the Earth. Why is it important for us to understand the history of the
Earth?

Which other elements contain the same number of outer electrons as sodium

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.

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon