La Nomenclatura química que emplea diversos sufijos y prefijos, según la valencia de los elementos químicos que se encuentran en la fórmula se denomina:

Why is it often difficult to get funding for local parks? a. state governments do not like to grant permits for local parks. b. federal regulations prohibit most fund raising. c. there is often a small tax base. d. federal funding cuts have all but stopped local construction of parks.