If a flask initially contains 1.0 atm of A and 1.2 atm of B, what is the pressure in the flask if the reaction proceeds to completion? (Assume constant volume and temperature.) If a flask initially contains 1.0 of and 1.2 of , what is the pressure in the flask if the reaction proceeds to completion? (Assume constant volume and temperature.) 3.2 atm 2.2 atm 1.7 atm 1.2 atm