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Memorial Day of the young anti-fascist hero - February 8

Thousands of boys and girls perished and stepped into immortality. Do not forget these names! Since 1964, the Day of the Young Anti-Fascist Hero has been celebrated throughout the world. It was approved by the UN Assembly in honor of two teenagers who died at an anti-fascist rally.

2019-12-08 11:45

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Formaldehyde. Preparation of Formaldehyde

Formic aldehyde, or formaldehyde, is a colorless gas with a pungent, unpleasant, specific odor. It is highly soluble in water, as well as in alcohols. Formaldehyde is very toxic and can cause pathological changes in the human body. In addition, it is considered a carcinogen.

2019-12-08 11:45

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The use of alkanes

The use of alkanes is quite diverse - they are used as fuel, as well as in mechanics, medicine, etc. The role of these chemical compounds in the life of modern man is difficult to overestimate.

2019-12-08 11:45

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Sensation Properties

Sensations are the simplest mental cognitive process. All of them can be divided into three types: interoceptive, proprioceptive and exteroceptive. The first group includes sensations arising from impulses reaching us from the internal environment of the human body.

2019-12-08 11:45

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Natural resource potential of Russia

Russia is a beautiful country with a large territory. It includes several time zones and climatic zones. The natural resource potential of Russia is also rich and diverse. Thanks to this, she can provide herself with all the resources necessary for domestic consumption and use them for export.

2019-12-08 11:45