A catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This is called catalysis.A catalyst is not consumed by the reaction and it may participate in multiple reactions at a time.The only difference between a catalyzed reaction and an uncatalyzed reaction is that the activation energy is different. There is no effect on the energy of the reactants or the products. catalyst is a chemical substance that affects the rate of a chemical reaction by altering the activation energy required for the reaction to proceed. This is called catalysis.
A boater hat, also known as a sennit, basher, skimmer, or sailor, is a distinct type of straw hat. This piece of headwear has a stiff flat top and brim. A wide ribbon or piece of material is often wound around the crown of the hat.
A Panama hat (toquilla straw hat) is a traditional brimmed straw hat of Ecuadorian origin. Traditionally, hats were made from the plaited leaves of the Carludovica palmata plant, known locally as the toquilla palm or jipijapa palm, although it is a palm-like plant rather than a true palm.