The book will serve as a flat surface on which you will later place additional weights. it has its own mass, which you need to measure. zero the balance. place the book on the balance. measure the mass to the nearest gram (1 g).

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

Needs for population