Oxygen gas reacts with hydrogen gas according to the following reaction O2(g) + 2H2(g) - 2H20 (1) If the enthalpy of formation for oxygen gas and hydogen gas are both 0 kJ/mol and the enthalpy of formation for water is -286 kJ/mol. What is the enthalpy of the reaction?
ΔΗrxη = ΣηΔΗ(products) - ΣηΔΗ(reactants)

a. 0 kJ

B. not enough information to determine.

C. - 286 kJ

D. -572 kJ

The compound methyl butanoate smells like apples. its percent composition is 58.8% c, 9.9% h, and 31.4% o. what’s the empirical formula ?

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.

The student repeated the experiment using a higher concentration of acid. the same volume of acid and the same mass of magnesium ribbon were used. what volume of hydrogen gas would have been produced after 60 seconds?