Definition. The partial pressure of a given gas is defined as the pressure exerted by that gas alone. For example, consider the gaseous mixture of oxygen, nitrogen, carbon dioxide, and water vapor, the typical mixture found in alveolar gas.
From Wikipedia, the free encyclopedia. Philadelphia County is a county located in the commonwealth of Pennsylvania. At the 2010 census, the population was 1,526,006, making it the most populous county in the state, despite being the second smallest county in the state by land area.
Hummelstown is a borough in Dauphin County, Pennsylvania, United States. The population was 4,520 as of 2013. It is part of the HarrisburgâCarlisle Metropolitan Statistical Area. Originally named Fredrickstown, the village was established in 1762. The borough's mayor is Bradley Miller.