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Hace 10 horas · Pennsylvania (/ ˌ p ɛ n s ɪ l ˈ v eɪ n i ə / ⓘ, lit. ' Penn's forest country '), officially the Commonwealth of Pennsylvania (Pennsylvania Dutch: Pennsylvanie), is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States.Pennsylvania borders Delaware to its southeast, Maryland to its south, West Virginia to its southwest, Ohio and the ...
Hace 10 horas · Ammonia is an inorganic chemical compound of nitrogen and hydrogen with the formula N H 3.A stable binary hydride and the simplest pnictogen hydride, ammonia is a colourless gas with a distinctive pungent smell. Biologically, it is a common nitrogenous waste, and it contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to fertilisers.
