初中化学课本中研究质量守恒定律的实验有两个。[实验4-1]:在底部铺有细砂的锥形瓶中,放入一粒火柴头大小的白磷。在锥形瓶口的橡皮塞上安装一根玻璃棒,并使玻璃棒能与白磷接触。将锥形瓶放在托盘天平上,用砝码平衡。然后,取下锥形瓶。将橡皮塞上的玻璃棒放在酒精灯火焰上灼烧 There are two experiments in the study of conservation of mass in junior high school chemistry textbooks. [Experiment 4-1]: In a conical flask with fine sand on the bottom, put a match-sized white phosphor. A glass rod is mounted on the rubber stopper of the conical bottle mouth, and the glass rod can come into contact with white phosphorus. Place the flask on a pallet balance and balance it with a weight. Then remove the Erlenmeyer flask. Put the glass rod on the rubber stopper on the flame of the alcohol lamp to burn