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प्रश्न
What is the significance of the formula of a substance ?
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उत्तर
The significance of the chemical formula of any substance is as follows:
- A chemical formula of a substance (element or compound) represents its name.
- A chemical formula provides important information on the chemical makeup of any substance (element or compound). It names all the elements present in the molecule.
- A chemical formula also provides important information on the number of atoms of each constituent element of the molecule of the substance.
- A chemical formula represents one mole of molecules of the substance (element or compound), which is 6.022 × 1023 molecules of the substance.
- Since, a chemical formula represents one mole of molecules of a substance, it also represents the definite mass of that substance, which is expressed as gram molecular mass.
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संबंधित प्रश्न
What is meant by the term chemical formula?
Name the element in the compound and give the formula of the following compound:
Nitric acid
Write the formula of the following compound:
Potassium aluminate
Write the formula of the following compound:
Sodium sulphite
Write the formula of the following compound:
Sodium permanganate
Write the formula of the following compound:
Aluminium nitrate
Write the formula of the following compound:
Aluminium hydroxide
Write the formula of the following compound:
Copper [II] nitrate
Write the formula of the following compound:
Tetra amine copper [II] sulphate
Play a game for writing formula.
Example 1: Make placards with symbols and valencies of the elements separately. Each student should hold two placards, one with the symbol in the right hand and the other with the valency in the left hand. Keeping the symbols in place, students should criss-cross their valencies to form the formula of a compound.
