How to receive ethane from acetylene

How to receive ethane from acetylene

Acetylene belongs to unsaturated hydrocarbons. Its chemical properties are defined by threefold communication. It is capable to react oxidations, replacements, accessions and polymerizations. Ethane is saturated hydrocarbon for which the natures of reaction of replacement on radical type, dehydrogenations and oxidations. At a temperature about 600 degrees Celsius it decays on hydrogen and eten.

What are the natural sciences

What are the natural sciences

All set of knowledge of the person of the environment surrounding him, the world, the earth, water, the nature and other things has to take accurate place in a complex of other sciences and disciplines. To reunite all knowledge of this world accumulated by mankind, the special discipline - natural sciences was created.

How to find the rotating moment

How to find the rotating moment

Correctly to calculate action of force rotating a body, define a point of its application and distance from this point to a rotation axis. It is important for definition of technical characteristics of various mechanisms. Torque of the engine can be calculated if its power and frequency of rotation is known.

Chemical elements: all about sulfur

Chemical elements: all about sulfur

Sulfur — chemical element VI of group of a periodic system, it is carried to chalcogens. The average content of sulfur in earth crust is 0.05% of all weight, and in the seas and oceans — 0.09%. In the form of connections it is present at slates, oil and natural gases, is a part of vitamins and proteins.

How to raise and lower tension

How to raise and lower tension

In Russia an overwhelming part of electric devices works from the alternating current main of 220 volts. But in certain cases there is a need for increase or decrease in this tension.