A chemical equation is shown below. KNO3 → KNO2 + O2 What are the coefficients that should be added to balance this equation? Use complete sentences to explain your answer. (like, what do the coefficients mean, why do we need them, etc) Explain how this chemical reaction demonstrates the conservation of mass. (10 points) I know the balanced equation I just need an explanation like what do the coefficients mean and why do we need them