pls explain the use of molecularity - Chemistry -

Question

pls explain the use of molecularity

Ap · Accepted Answer

A chemical reaction that takes place in one and only one step i
e , all that occurs in a single step is called elementary reaction
while a chemical reaction occurring in the sequence of two or more
steps is called complicated reaction The sequence of steps through
which a complicated reaction takes place is called reaction –
mechanism Each step in a mechanism is an elementary step
reaction
The molecularity of an elementary reaction is defined as the
minimum number of molecules, atoms or ions of the reactants(s)
required for the reaction to occur and is equal to the sum of the
stoichiometric coefficients of the reactants in the chemical
equation of the reaction
In general, molecularity of simple reactions is equal to the sum
of the number of molecules of reactants involved in the balanced
stoichiometric equation