Identify each part of this chemical equation, which describes the burning of methane and oxygen. A (the entire green box):

B (the blue box):

C (the arrow):

D (the number):

E (the purple box):

Referring to the attached picture, A (the entire green box) represents the balanced chemical equation, B (the blue box) represents the reactants, C (the arrow) represents the irreversibility of the reaction, D (the number) represents the stoichiometric coefficient for oxygen and E (the purple box) represents the products.

We have the combustion reaction of methane.

CH₄ + O₂ ⇒ CO₂ + H₂O

A (the entire green box) represents the balanced chemical equation.

B (the blue box) represents the reactants (substances that react).

C (the arrow) represents the irreversibility of the reaction (it only occurs from left to right).

D (the number) represents the stoichiometric coefficient for oxygen.

E (the purple box) represents the products (substances that are formed).

Referring to the attached picture, A (the entire green box) represents the balanced chemical equation, B (the blue box) represents the reactants, C (the arrow) represents the irreversibility of the reaction, D (the number) represents the stoichiometric coefficient for oxygen and E (the purple box) represents the products.

You can learn more about chemical equations here:

grav potential energy