Final answer:
The subject of this question is Physics, and it relates to pressure and temperature changes in a closed system. By using the combined gas law, we can find the final pressure in the tank. Cooling the tank is a practical solution to reduce the pressure.
Step-by-step explanation:
The given question relates to pressure and temperature changes in a closed system, which falls under the subject of Physics.
To find the final pressure in the tank, we can use the combined gas law. Since the problem involves a negligible amount of gas leakage and no phase change, we can assume the number of moles of gas remains constant. By rearranging the combined gas law equation and plugging in the given values, we can solve for the final pressure.
Cooling the tank is a practical solution to reduce the pressure, as it lowers the temperature of the gas and therefore decreases its pressure.