In a chemical change, the molecules in the reactants interact to form new substances. In a physical change, like a state change or dissolving, no new substance is formed. Explain that another way to say that no atoms are created or destroyed in a chemical reaction is to say, “Mass is conserved.”
Simply so, what quantities are conserved in a chemical reaction?
Chemistry Chapter 12.1-The Arithmetic of Equations
|12.1 What quantities are conserved in every chemical reaction?||Mass and atoms are conserved in every chemical reaction|
How matter is conserved in a chemical reaction?
Both the initial and final substances are composed of atoms because all matter is composed of atoms. According to the law of conservation of matter, matter is neither created nor destroyed, so we must have the same number and type of atoms after the chemical change as were present before the chemical change.
What stays the same when a chemical reaction takes place?
Chemical Reactions. Because atoms are neither created nor destroyed in a chemical reaction, the total mass of products in a reaction must be the same as the total mass of the reactants. Example: The reaction between hydrogen and oxygen to form water is represented by the following equation.