Question

how did margie's reaction to the printed book differ from Tommy's?​

Answer 1

the book is too old, it's not good like this reactions are given by Margie

Answer 2

Conservation of matter is the law. You can also call it the conservation of mass. When we balance an equation, we determine the ratio of reactants to products which allows for the total number of atoms of reactants to match the number of atoms of the products.