Barium Sulphate
Barium sulphate is an inorganic compound with the chemical formula BaSO4.
- Composition:
- Barium (Ba) is a heavy alkaline earth metal.
- Sulphate (SO4) is a polyatomic ion consisting of one sulfur atom and four oxygen atoms.
- Properties:
- Barium sulphate is a white, crystalline solid that is insoluble in water.
- It is commonly used in medical imaging, particularly in X-ray imaging of the digestive system.
Ammonium Nitrate
Ammonium nitrate is an inorganic compound represented by the formula NH4NO3.
- Composition:
- It consists of the ammonium ion (NH4+) and the nitrate ion (NO3-).
- Properties:
- Ammonium nitrate is a white, crystalline solid that is highly soluble in water.
- It is widely used as a fertilizer in agriculture due to its high nitrogen content and is also used in explosives.
Limestone
Limestone is a sedimentary rock primarily composed of calcium carbonate, with the chemical formula CaCO3.
- Composition:
- Calcium (Ca) is a metal that forms the basis of the compound.
- Carbonate (CO3) is a polyatomic ion comprising one carbon atom and three oxygen atoms.
- Properties:
- Limestone appears as a grayish or whitish rock and is commonly used in construction, as a soil conditioner, and in the production of lime for various industrial processes.
In conclusion, the chemical formulas for the compounds discussed are BaSO4 for barium sulphate, NH4NO3 for ammonium nitrate, and CaCO3 for limestone. Understanding these compounds and their formulas is crucial in various scientific and industrial applications.

Ammonium nitrate - (NH 4)(No3)
Barium sulphate - BaSo 4
limestone - CaCo 3