changed from one form to another.
This statement is based on the law of conservation of mass, which states that in a closed system, the total mass of the reactants must be equal to the total mass of the products in a chemical reaction. In other words, no atoms are created or destroyed during a chemical reaction, they are rearranged to form new substances.
For example, when wood is burned, it undergoes a chemical reaction with oxygen in the air to form carbon dioxide, water vapor, and other byproducts. The mass of the wood before burning is equal to the mass of the carbon dioxide, water vapor, and ash produced. Although the wood has changed its form, the total mass remains the same.
Similarly, in the process of photosynthesis, carbon dioxide and water react to form glucose and oxygen. Again, the mass of the reactants (carbon dioxide and water) is equal to the mass of the products (glucose and oxygen). The atoms from the reactants are rearranged to form the products, but none are lost or gained in the process.
This principle applies not only to chemical reactions but also to physical changes. For example, when ice melts, the water molecules rearrange themselves to form liquid water. The mass of the ice is equal to the mass of the liquid water.
In summary, matter cannot be created or destroyed, only transformed or rearranged in chemical and physical processes. This fundamental principle is the basis for many calculations and experiments in chemistry.