Question

a word written over the arrow in a chemical reaction equation indicates (1 point)
○ that the substance provides heat for the reaction
○ that the substance provides energy for the reaction
● that the substance is a product of the reaction
○ that the substance is a reactant of the reaction

Explanation:

In a chemical - reaction equation, reactants are written on the left - hand side, products on the right - hand side, and substances like catalysts or reaction conditions are written over the arrow. It is not a product or reactant indication. Heat or energy provision is also not what it generally means.

Answer:

None of the above options are correct.