Describe a chemical equation with an example.

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Solution

A chemical reaction represents a chemical change from one or more substances to a new substance.
These chemical reactions are represented using symbols and formulae of the substances involved in the reaction. Such representation is known as the Chemical equation.
For writing a chemical equation at first skeletal equation is written.
A skeleton chemical equation represents a chemical reaction by employing chemical equations for reactants and products.
For example - $H_{2} + {Cl}_{2} \to HCl$
Now, balance the given reaction -
A chemical equation is said to be balanced if the number of atoms of each element on the left-hand side is equal to the number of atoms present on the right-hand side.
For example - $H_{2} + {Cl}_{2} \to 2 HCl$

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