Any chemical reaction creates a new substance.
no
The majority of chemicals can react.
In any chemical equation you start with reactants and end up with products.
A reaction has two components with the reactant as an "ingredient," and the product is the end result. A combustion reaction as the reactants of O2 (oxygen) and CH4 (methane). Their product through the reaction CH4 + 2O2 is 2H2 (water) and C02 (carbon dioxide).
The products
A chemical reaction begins with reactants and ends with products.
The products. Reactants -----> product
Enzyme or catalyst
No, that is a catalyst. An enzyme is a type of catalyst, though.
no
These chemicals are called reactants.
The majority of chemicals can react.
The act of mixing chemicals is a physical process, not a chemical reaction. Mixing chemicals together may, or may not, allow a chemical reaction to proceed, depending on the nature of the chemicals being mixed.
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.