A chemical reaction begins with reactants and ends with products.
The products. Reactants -----> product
Any chemical reaction creates a new substance.
Enzyme or catalyst
No, that is a catalyst. An enzyme is a type of catalyst, though.
no
The products
In any chemical equation you start with reactants and end up with products.
A catalyst must change the rate of a chemical reaction. It must be unchanged at the end of the reaction.
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.
The products
The products of a burning reaction is absorbed into the atmosphere. Hope this helps :)
They lower the activation energy required to perform the reaction.