I think you are talking about a chemical change,
I think you are talking about a chemical change,
A substance that undergoes change in a chemical reaction is called a reactant.
Catalyst: a substance which speeds up a chemical change or enables the change to take place at a lower tempature, and is not changed or used up in the reaction.
The reactants are changed in products having new chemical composition.
During a physical change the chemical formula is not changed.
During a physical change the chemical formula is not changed.
Physical change because the molecules have not changed to form a new substance.
The composition of a chemical compound is not changed during a physical change.
chemical
This is a physical change.
The statement is false: A chemical change of a substance is defined as a change in which the substance is not the same substance after the change as it was before.
Any instance in which the chemical formula of a given substance is changed, resulting in the formation of a new substance.