H2 + O2 → H2O

Why does his teacher ask him to balance the equation by including the correct coefficients?

A. to show that most molecules exist in pairs

b. to show that most compounds exist in pairs

c. to show that atoms are conserved in chemical reactions

d. to show that atoms are created in chemical reactions

C. to show that atoms are conserved in chemical reactions.

Explanation:

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.