What do the coefficients of a balanced equation represent

Coefficients of a balanced equation represent the amount of moles, that has each reactant and the products that are made

Explanation:

In the reaction:

2H₂ (g) + O₂ (g)  → 2H₂O (g)

2 moles of hydrogen react with 1 mol of oxygen to produce 2 moles of water.

If there is no coefficient, you assume a value of 1.

You can also say, 1 mol of oxygen reacts with 2 moles of hydrogen to produce 2 moles of water.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.