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质量守恒定律是初中化学惟一学到的基本定律 ,是一切化学反应所必须遵循的规律 ,是正确书写化学方程式和根据化学方程式进行计算的依据 .一、定律内容剖析定律内容 :参加化学反应的各物质的质量总和等于反应后生成的各物质质量总和 .(1)参加反应 :指实际参加反应的物质及其质量
The law of conservation of mass is the only law that junior high school chemistry learns. It is the law that all chemical reactions must follow. It is the basis for the correct writing of chemical equations and calculations based on chemical equations. I. Contents of the law for the analysis of laws: The contents of the participating chemical reactions The sum of the mass of the material is equal to the sum of the mass of each material produced after the reaction. (1) Participation in the reaction: refers to the substance actually participating in the reaction and its quality.