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.
User submitted facts and corrections: 1  Whitehall (Whitehall Township), PA is in Lehigh County and not near Pittsburgh. Only about 1 hour north of Philadelphia. 2  There is a Whitehall, PA near Pittsburgh and near Philly. This listing is for the one near Pittsburgh. Whitehall PA 18052 is located in the eastern part of PA close to allentown and not too far from philly....Your map is showing it western near pittsburg??