Final answer:
Surface area of tank, ambient temperature, gas temperature, liquid level, relative humidity, and location primarily affect gas pressure and solubility, with temperature and volume being major factors.
Step-by-step explanation:
Surface area of tank, ambient temperature, temperature of gas, liquid level, relative humidity, and location are important factors affecting gas pressure and solubility. Factors such as temperature, volume, and the amount of gas influence the pressure of an enclosed gas. The kinetic-molecular theory explains that gas molecules move randomly and collisions with the walls of the container determine gas pressure. As temperature increases, gas solubility typically decreases, which is also significant when considering thermal pollution in natural bodies of water. Furthermore, pressure is affected by the volume of the container; a smaller volume causes an increase in pressure due to the gas molecules having less space to move.