Question

What do mean by a chemical formula ?

Answer 1

it is a symbolic representation of an element.and it shows the number of atoms of element. we find chemical formula by multiplying the valency of elements.
for example-water,it's formula is H2o

Answer 2

Hi friend, Here's the required answer:-

CHEMICAL FORMULA is the symbolic representation of all the elements present in the compound.

For example:-

1. The chemical formula of water-. H2O.
Hydrogen and oxygen are present in water.

2. The chemical formula of Magnesium oxide -
MgO
Magnesium and oxygen are present in Ma-
gnesium oxide.

3. The chemical formula of Sodium Chloride (c-
common salt)- NaCl

Hope this helps you...