law of conservation of mass

• Principe fondamental en physique et en chimie selon lequel la masse ne peut être ni créée ni détruite dans un système fermé au cours de transformations chimiques ou physiques ordinaires ; la masse totale reste constante pendant une réaction ou une transformation.

A fundamental principle in physics and chemistry stating that mass cannot be created or destroyed in a closed system through ordinary chemical or physical changes; the total mass remains constant during a reaction or transformation.

1. Fundamental principle of chemistryB2formal

   A scientific law stating that mass is neither created nor destroyed in a closed system during a chemical reaction.

   loi de conservation de la masse

   • According to the law of conservation of mass, the total mass of reactants equals the total mass of products.
   • In a closed flask, the law of conservation of mass ensures that the mass remains constant after a reaction.
   • Students learn the law of conservation of mass in introductory chemistry classes.