質しつ量りょう保ほ存ぞんの法ほう則そく

noun

law of conservation of mass

Scientific term used in physics and chemistry. States that mass is neither created nor destroyed in a closed system.

• 化か学がく反はん応のうでは、質しつ量りょう保ほ存ぞんの法ほう則そくが成なり立たつ。

  In chemical reactions, the law of conservation of mass holds true.