Question

WHAT IS A CHEMICAL FORMULA


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Answer 1

Answer:

The chemical formula of a substance is based on the composition of the substance. It indicates the type and number of atoms of each kind present in that substance.

For example :-

Chemical Formula of water $H_2 O$

Answer 2

AnSwEr :

Each chemical compound is known by a specific name. Writing the full name of a compound repeatedly is time consuming. Therefore, in chemistry each substance is denoted by its chemical formula.

There are two types of chemical formulae :-

• Molecular formula
• Empirical formula

⊃ A shorthand notation of a molecule in terms of symbols and the number of atoms of each element present in it is called molecular formula.

• For example:- The molecular formula of water is H20. Thus, one molecule of water contains two atoms of hydrogen and one atom of oxygen.

⊃ Empirical formula of a substance is the simplest formula which gives the lowest whole number ratio between the number of atoms of different elements present in the substance.