3.2g of magnesium reacts with hydrochloric acid, generating hydrogen gas according to the reaction below. The hydrogen gas is collected over water. Mg(s) + 2HCl(aq) --> MgCl2(aq) + H2(g)
If 2.97L of hydrogen gas is collected at 760 mmHg and 20C what was the percent yield of the reaction?

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.