2.0 L of gas A at 1.0 atm and 1.0 L of gas B at 1.0 atm are combined in a 3.0 L flask. The flask is sealed and over time they react to completely to give gas C according to the following chemical equation:
2A(g) + B(g) → C(g)
Assuming the temperature stays constant, what will be the pressure after the reaction goes to completion?
◦ 0.33 atm
◦ 0.50 atm
◦ 0.67 atm
◦ 0.75 atm
◦ 1.0 atm