A catalyst is a material which make possible a chemical reaction, improve the rate of reaction, increases the yield of the reaction; a catalyst doesn't react with reactants/products.
Sure! What are the following statements about centripetal force you would like to know if they are true or not?
A catalyst is a substance that speeds up the rate of a chemical reaction.
catalyst-by lowering activation energy
True. The three-second rule helps you maintain a safe following distance from the vehicle in front of you. To do this, pick an object on the road ahead and when the vehicle ahead passes it, count "one thousand one, one thousand two, one thousand three." If you pass the object before you finish counting, you are following too closely.
The effect occurs before the cause.
that is true
Yes, it's true.
Yes. it is true.
Metal
It is true that a catalyst is used in chemical reactions to help speed up the reaction by reducing activation energy.
No, it is not true that a catalyst raises the activation energy of a reaction. In fact, a catalyst lowers the activation energy, allowing the reaction to occur more easily and at a faster rate. By providing an alternative pathway for the reaction, catalysts facilitate the formation of products without being consumed in the process.
I think this refers to catalysts as these are considered not to be changed by a reaction-- sometimes this true when molecules react on the surface of a catalyst bu sometimes the catalyst does get involved in the chemical reaction- but is regenerated.
CFC's are catalysts. They fasten the rate of reaction.
The catalyst is not a reactant in a chemical reaction but contribute to the success of this reaction.
Yes, a catalyst can be re-used, because It is NOT actually used in a chemical reaction. A catalyst will increase the rate of reaction by attracting reactants, but the catalyst is not a reactant. However, the reuse cannot be done indefinitely then, depending on the severity of the reaction conditions, it can be occur a small, but accumulative deactivation of the catalys.
Hi
Reduces the activation energy of the reaction, which speeds up the progress of the reaction It increases the rate of a chemical reaction. However a true catalyst is not consumed in the reaction.