Some chemical tasks demand performance of standard actions therefore their knowledge often is useful. The algorithm of finding of amount of substance is rather simple, it can be useful for simplification of the course of the decision.
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?