Both true and false.
Rusting is both a chemical reaction (converting iron to iron oxide) and a physical process (the iron oxide absorbs water and hydrates, causing it to expand and fracture the rusting metal into pieces).
The reactants
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
The reactants exist before a reaction begins, and also the products are the result of the reaction of the reactants.
for energy:) The major reason for chemical bonding is to produce energy. As a reaction occurs and begins to form products at a lower energy, energy must be released.
The combustion reaction begins with the rapid combination of a fuel and oxygen. This produces heat and light (fire).
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
reactants
The reactants
A chemical reaction begins with reactants and ends with products.
ikjhhmhj,kj,kj
true
Pure substances (or ELEMENTS) form COMPOUNDS after a chemical reaction. For example: Sodium and chlorine, when fused in a chemical reaction become the compound Sodium-Chloride The substance you have in the beginning of a chemical reaction are called reactants and the substance you have when chemical reaction is complete is called products.
No: the substances present at the beginning of reaction are the reactants or reagents.
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
This is a physical change. Chemical changes are changes in "what things are made out of".
Teeth themselves do not cause a chemical reaction. However, when food comes into contact with teeth, the process of digestion begins with enzymes in saliva breaking down the food molecules into smaller components. This can be considered a chemical reaction in the context of digestion.
The reactants exist before a reaction begins, and also the products are the result of the reaction of the reactants.