Observed in Illinois on the first Monday of March every year, the holiday ostensibly honors Polish-born Revolutionary War cavalry officer Casimir Pulaski, though for most school kids with a four-day week, itâs probably just another sweet, sweet sleep-in day.
Yes, in chemistry a pure substance means either an element or a compound. Thus, hydrogen, oxygen, sodium, iron, copper etc. are pure substances; and so are compounds such as water, sugar, ammonia, sodium chloride, methane, ethanol etc. A compound is composed of two or more elements combined in a fixed ratio by mass. Like an element, a compound also has a distinct chemical identity. A mixture is not a pure substance as it is a collection of two or more elements/compounds in varying ratio. Air, sea water, gasoline, vegetable oils, steel etc. are mixtures.
The chemical formula for ammonia is NH3. When ammonia is manufactured, it is primarily used to make fertilizer. It is used to manufacture synthetic fibers, textiles, pulp and paper, pesticides, explosives, smelling salts, cleaning products, rocket fuel, fuel cells, and some foods and beverages.Ammonia is also used to make other chemicals, including nitric acid and cyanide.t home, you can be exposed if you use products that contain ammonia, including window cleaners, floor waxes, and smelling salts. If you work on or live near a farm, you can breathe ammonia in the air if the farm uses ammonia fertilizers.