# Charlie is balancing an equation. She has identified the atoms and counted the nurmber of each in the reactarts and products. What would Charlie adjust to make the number of atoms in the reactants the same as the atoms in the products?

Chemical reactions conserve MASS and CHARGE absolutely. A given mass of reactants, from all sources, $1 \cdot g , 10 \cdot g , 1 , 000 , 000 \cdot g$, gives AT MOST the SAME MASS of products...$1 \cdot g , 10 \cdot g , 1 , 000 , 000 \cdot g$.