Suppose the apparatus shown in the figure accompanying Problem 5.129 contains H2 at 0.500 atm in the

Question:

Suppose the apparatus shown in the figure accompanying Problem 5.129 contains H2 at 0.500 atm in the left vessel separated from O2 at 1.00 atm in the other vessel. The valve is then opened. If H2 and O2 react to give H2O when the temperature is fixed at 300 K, what substances remain and what are their partial pressures after reaction?