“The total weight of the substances entering into a chemical change is equal to the total weight of the substances produced.
Law of Conservation of Mass
“When elements combine to form a compound, they do so in a definite proportion by mass.”
Law of Definite Proportions
“The masses of one element combined with a fixed mass of another element in a different compound of the two elements are in the ratio of small whole numbers.”
Law of Multiple Proportions
Looking at a reaction tells us how much of something you need to react with something else to get a product
Chemistry Recipes