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.
The Hispanic Center of Reading and Berks County has been serving the city of Reading and the county of Berks in Pennsylvania since 1977. It has been the principal agency serving the needs of the rapidly growing Latino population in this area which, according to the 2000 Census represents 37% of the city population and over 58% of the population of the School District of Reading. This represents one of the most densely Latino populated areas in the northeast of the United States.