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质量守恒定律是初中化学很重要的定律。是书写化学化学方程式的原则之一,是进行化学方程式计算的依据。何谓质量守恒定律?指的是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的质量总和。同学们在理解质量守恒定律时,可从化学反应的实质去理解质量守恒定律。即分子破裂成原子,原子重新组合成新的分子。然后得出质量守恒的微观原因:化学反应前后原子的种类、数目、质
The law of conservation of mass is a very important law of junior high school chemistry. Is one of the principles of writing chemical chemical equations, chemical formula calculation basis. What is the law of conservation of mass? It means that the total mass of each substance participating in a chemical reaction is equal to the sum of the masses of the substances produced after the reaction. Students understand the law of conservation of mass from the essence of the chemical reaction to understand the law of conservation of mass. That is, molecules break into atoms and atoms recombine into new molecules. And then come to the micro-reasons for the conservation of mass: the type of chemical atoms before and after the reaction, the number of qualitative