Question

explain how the chemical equation in forms about the nature of the elements and the direction of the reaction?

Answer 1

A chemical equation give information of what is happening in the change .
It give Information about changes that occurs due to interaction of the reactants.
U have asked about nature

Consider a rxn
N2(g) +3H2(g) -------->2NH3 ( g)
<--------
here (g) indicates the nature of the reactants and product .
in Above equation it is gas

And double arrows shows that the rxn is reversible means we can again get nitrogen and hydrogen from the ammonia.
CH4(g) +2O2(g)------>CO2(g) +2H2O(l)
Combustion of methane is not reversible process.

We get this information from equation

hope this helps