Shown here is the chemical formula for ammonia. N H
NH,
The 3 in the chemical formula for ammonia means that there are
three-
А
atoms of ammonia
B
molecules of ammonia.
с
atoms of hydrogen in each molecule.
D
atoms of nitrogen in each molecule.

Explanation: Ammonia is made out of one nitrogen and three hydrogen atoms. Its structure is tetrahedral. Ammonia is used in nitric acid production, as a fertilizer, and a cleaning solution.

NH3, normally found as a gas, it is caustic and harmful in longterm exposure. NH3 has a boiling point of -33 Celsius, and must be stored under pressure, or at low temperatures.

Ammonia is regulated in the United States as a substance that is a non-flamable gas. However, it still meets the definition of a material that is toxic by inhalation and requires a hazardous safety permit.

Ammonia is usually a gas with a pungent odor. Ammonia used commercially is usually named anhydrous ammonia. An exposure to a very high concentration of ammonia could result in lung damage and death

Ammonia is a gas with a strong smell. Its chemical formula is NH3. If exposed to a very high concentration of ammonia, it can cause lung damage and death.

Ammonia, NH3, is a compound that is has a strong smell. Even though the gas helps the nutrition of our planet, it can cause serious problems to our health.

Ammonia, NH3, is a pungent gas. It is colorless, and used to manufacture fertilizers and

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure  

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.