Hydrogen – the first element of the table of Mendeleyev, colourless gas. In the nature there is in the form of three isotopes, a most widespread of them – protium. It is widely applied in the different fields of the industry and also as a component of rocket fuel. It is very perspective also as automobile fuel as products of combustion of hydrogen do not do harm to the environment. Often there is a need to define what volume of hydrogen will be required for reaction with any given substance. How it can be done?

Extent of dissociation is the size equal to the relation of quantity of the molecules of substance which broke up to ions to total number of molecules of this substance in solution or fusion.

Force of electrostatic interaction represents force with which charged particles work at each other. Expression was open for it by the physicist Charles Coulon in honor of whom this force also was called.

Butane is the organic matter belonging to the class of saturated hydrocarbons. Its chemical formula C4H10. It is mainly used as a component of high-octane gasolines and as raw materials for production of butene. Butene — unsaturated hydrocarbon, gas, has formula C4H8. Differs from butane in existence of one double communication in a molecule. It is widely used at synthesis of butadiene, butyl alcohol, isooctane and polyisobutylene. Besides, butylene is applied as one of mix components to cutting and welding of metals.