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No one knows, because it was in prehistory.

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14y ago

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Who experimented with chemical reactions and discovered that the mass of the reactants before a chemical reaction equals the mass of the products afterward?

Joseph proust


What is a chemical change also referred to as?

Chemical reaction


How does an engine have a chemical reaction?

Combustion is a chemical reaction.


Is chemical reaction alive?

No. A chemical reaction is not alive.


What chemical is formed in a chemical reaction?

A new chemical substance is formed during a chemical reaction by rearranging the atoms of the reactants. The products of a chemical reaction have different properties compared to the original reactants.


What is the characteristic of chemical equation?

A chemical reaction is a graphical representation of a chemical reaction.


How can the efficiency of a chemical reaction be expressed?

A chemical reaction is represented by a chemical equation.


How was meitnerium discovered?

Meitnerium is an artificial chemical element; the first nuclear reaction used to obtain meitnerium was: 20983Bi + 5826Fe → 266109Mt + n


A chemical reaction can be concisely represented by a chemical what?

A chemical reaction can be represented by a chemical equation.


How does a chemical equation show that a chemical reaction has occurred?

A chemical equation shows that chemical reaction has occurred as new substances have been formed from the reagents. A chemical equation has two sides before reaction and after reaction, if there is any change from the before reaction side to the after reaction side, it indicates that a chemical reaction has just occurred.


In a chemical reaction the reaction must do what?

The reaction must change the chemical nature of reactants.


What is cheamical reaction?

a chemical reaction is a reaction were the two chemicals change into a new chemical.