An experiment requires feeding a reactor with ammonia. One of the proposed solutions is to supply ammonia from containers filled from the plant's tanks. The volume of the containers is 100 ft3. The full circle emptying and filling the containers are as follows: 1. Initially the container is in warehouse A at temperature TA, where it remains for a very long time. The percentage of ammonia in the gas phase is Y. 2. The vessel to be used is transferred from storage A and immediately connected to the reactor. No heat is transferred during transport. Ammonia exits the top of the vessel and the flow is stopped when the pressure in the vessel becomes P1. Due to the short duration of the experiment it can be considered that it is done without heat. 3. The empty container is placed in storage B at temperature TB, where it remains for a long time. 4. The container to be filled is transferred from storage B to the compressor area, without any significant heat flow. Filling is done by connecting the container to an ammonia compressor. Ammonia flows nonheated, with pressure P2 and temperature T2, until the pressure inside the vessel becomes equal to P2. Next, the container is transferred to warehouse A and the cycle repeats. Find the percentage of ammonia remaining in the container after the third discharge.