What information does a chemical equation give you?

the number of molecules in a certain substance

Answers:

A chemical equation will tell you the formulas and symbols of the reactants and products.

A chemical equation can show the physical state of a substance, whether it is a solid, liquid, gas, or in solution.

A chemical equation can show if special conditions are required for a reaction to take place, such as adding heat or using a catalyst.

And, if the equation is balanced: The coefficient numbers in the equation show the number of molecules, formula units, or atoms of the species involved in the reaction. The coefficients also equal the number of moles of each reactant and product.