A chemical reaction begins with reactants and ends with products.
The products. Reactants -----> product
Any chemical reaction creates a new substance.
Enzyme or catalyst
Because the process of producing the flame is a chemical reaction. The reaction can only exist if there are unused chemicals to fuel the change. Once all the chemicals are used up - the reaction stops.
No, that is a catalyst. An enzyme is a type of catalyst, though.
no
A catalyst must change the rate of a chemical reaction. It must be unchanged at the end of the reaction.
In any chemical equation you start with reactants and end up with products.
Batteries produce electricity by chemical reaction. When all the chemicals in the battery are used up, the reaction can't continue and the battery dies.
A catalyst is a substance that speeds up other chemical reactions but is not consumed or permanently altered in that reaction. Basically the catalyst just makes it easier for the other chemicals to react with each other so that the reaction will proceed faster. Enzymes are biological catalysts(catalysts that are created by living organisms). So an enzyme catalyzed reaction is when chemicals are reacting with each other and an enzyme is used to catalyze(speed up) the reaction.
The products
The products