Your cart is empty
Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.
Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride
The dissolution of zinc in hydrochloric acid produces hydrogen gas.
The solution of hydrogen chloride in water is called hydrochloric acid.
Knallgas is the mixture of hydrogen and oxygen. It will explode when ignited.
Polymerized ethylene is known as polyethylene, a type of plastic.
An entertaining animation to practice orientation using a map.
Common salt is dissolved by water: polar water molecules form a coat around the ions.
During freezing hydrogen bonds are formed between water molecules resulting in a crystal structure.
The cathedral named after the Assumption of Mary into Heaven is one of the gems of French Gothic architecture.
The length of the metal frameworks of bridges change when the temperature changes.
The most important Neoclassicist building in France, completed in 1791, became the final resting place of many of France´s greats.
The first indoor theater in modern history to be constructed according to the theater-building codes of Antiquity was inaugurated in 1585.
High speed generates a lift on airplane wings due to their asymmetrical profile.
Submarines submerge and surface by changing the average density of the hull.
Geothermal power stations convert energy of hot, high-pressure water found in deeper layers of the Earth into electricity.
Thermal power stations convert energy released during the combustion of fossil fuels or renewable resources into electricity.
During its orbit around the Earth, the visibility of the Moon's illuminated part constantly changes.
Neptune is the outermost planet of the Solar System, the smallest of the giant planets
The palace of the Frankish Emperor, Charlemagne, was not only the center of the Empire, but also a center of culture