Which of the following is not true about Chemical Equations?

a
Chemical equations represent chemical reactions
b
The reactants are separated from the products in a chemical equation by an arrow.
c
One arrow is used in a chemical equation if the reaction can only proceed in one direction.
d
If the reaction can occur in the opposite direction, two arrows are used in the equation.
e
Chemical equations do not show the number of reactant molecules involved in the reaction