A lot of homework questions, today. I wouldn't answer but the questions are always written poorly due to teachers not understanding their subject matter.
Your teacher probably wants you to say "An enzyme."
http://en.wikipedia.org/wiki/Enzyme
A catalyst is a substance that helps a chemical reaction happen faster without suffering any change. An example sentence is: Because of the catalyst, the project ending early.
Enzymes are biological catalysts. This means they speed up a chemical reaction, but are not broken down or changed by it. They lower the amount of energy required for a chemical reaction to tack place.
A catalyst affects a reaction by speeding it up. A catalyst, remember, does not participate as a reactant or product in the reaction. It facilitates the reaction by lowering its activation energy, making the reaction easier to happen.
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process, while a reactant is a substance that participates in a chemical reaction and is consumed. Essentially, a catalyst speeds up a reaction without being changed itself, while a reactant is consumed during the reaction.
A biological catalyst is a substance, typically a protein (such as an enzyme), that increases the rate of a chemical reaction within a living organism. Biological catalysts work by lowering the activation energy required for a reaction to occur, thus speeding up the process. This enables essential biological processes to occur efficiently in cells and organisms.
Enzyme - Logan
It's called a catalyst. A catalyst is present during a chemical reaction but does not participate as a reactant or product. A catalyst lowers the reaction's activation energy, making the reaction easier to happen. In the equation for a chemical reaction, the catalyst's formula appears in small notation above the "yield" arrow (format won't let me show you an example.) An example of a catalyst is potassium iodide (KI) speeding up the decomposition of hydrogen peroxide (H2O2).
I don't know what a catalyst is. (That's my sentence XD)
A catalyst is a substance that helps a chemical reaction happen faster without suffering any change. An example sentence is: Because of the catalyst, the project ending early.
The catalytic efficiency formula is calculated by dividing the rate of the reaction with the catalyst by the rate of the reaction without the catalyst. This ratio helps determine how effective the catalyst is in speeding up the reaction.
Enzymes are biological catalysts. This means they speed up a chemical reaction, but are not broken down or changed by it. They lower the amount of energy required for a chemical reaction to tack place.
A substance that changes the rate of a chemical reaction without being consumed is called a catalyst. Catalysts work by lowering the activation energy required for the reaction to occur, thereby speeding up the reaction process.
A catalyst affects a reaction by speeding it up. A catalyst, remember, does not participate as a reactant or product in the reaction. It facilitates the reaction by lowering its activation energy, making the reaction easier to happen.
Lowers the activation energy of a reaction, therefore speeding the reaction up.Catalysts speed up chemical reactions. They do not change the products or reactants of the reaction, and are not used up or consumed in the reaction. Biological catalysts are called enzymes. Catalysts lower the activation energy (or energy needed to start a reaction), and cause the reaction to occur more quickly.
A catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process, while a reactant is a substance that participates in a chemical reaction and is consumed. Essentially, a catalyst speeds up a reaction without being changed itself, while a reactant is consumed during the reaction.
if at the end of the chemical THAT substance is unchanged .That substance is a catalyst. If it slows donw the reaction, it is called an inhibitor.
An enzyme is a type of protein that acts as a biological catalyst, speeding up chemical reactions in living organisms.