Question

write the uses of
1- nitrogen
2- stratosphere
3- air pressure
4- argon

Answer 1

nitrogen are absorberb by plants and nitrogen fixation takes place.
Nitrogen is used for nitrogen fixation in leguminous plants.

Answer 2

Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia. This is done by the Haber process.

Discovered by:

Daniel Rutherford

Origin of the name:

The name is derived from the Greek 'nitron' and 'genes' meaning nitre forming

Discovery date:

1772
2) stratosphere The stratosphere the atmosphere's second layer, and is located right above the troposphere and right below the mesosphere. ... The stratosphereis abundant in ozone, a type of oxygen molecule that absorbs the sun's ultraviolet radiation anduses it to heat this layer in the atmosphere.

3) air pressure Air pressure is also known as atmospheric pressure. ... Some common use of air pressure in daily life is inflating tires, playing musical wind instruments, drinking through straw, flushing toilet, drawing water from well, operating barometer, blowing up balloon, breathing, maintaining body shape especially abdomen.

4) argon It is used to fill incandescent and fluorescent light bulbs to prevent oxygen from corroding the hot filament. Argon is also used to form inert atmospheres for arc welding, growing semiconductor crystals and processes that require shielding from other atmospheric gases.

Symbol:

Ar (18)

Atomic Weight:

39.948

Atomic Number:

18

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