Why is a pencil not a system

en contreto podemos establecer emana del latin  y mas exacatamente de la palabra lapiz que puede traducirse como piedra , un lapiz es un instrumento de escritura o dibujo que precenta una barra de grafico  encerrada de un cilindro o otro material                        

adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

explanation: