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一、质量守恒定律的概念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.这个规律叫作质量守恒定律.二、质量守恒定律的解释从原子、分子的观点来看,化学反应的过程,就是参加反应的各物质(反应物)的原子重新组合生成其他物质(生成物)的过程.在化学反应中,反应前后原子种类不变,原子数目不变,原子的质量不变.从宏观上和微观上理解质量守恒定律,可归纳为以下3点.1.五个不改变:宏观方面,化学反应前后,反应物和生成物的总质量不变,元素的种类不变;微观方面,化学反应前后,原子种
First, the concept of the law of conservation of mass The total mass of each substance that participates in the chemical reaction is equal to the sum of the masses of the substances produced after the reaction. This law is called the law of conservation of mass. Second, the explanation of the law of mass conservation From the viewpoint of atoms and molecules Look, the chemical reaction process, is to participate in the reaction of the various substances (reactants) atoms recombined to generate other substances (products) in the chemical reaction, the reaction before and after the same atomic species, the same number of atoms, the atomic The same quality.Macroscopically and microscopically understand the law of conservation of mass, can be summarized as the following three points: 1. Five do not change: macroscopically, before and after the chemical reaction, the total mass of the reactants and products unchanged, the type of element Unchanged; microscopic aspects, before and after the chemical reaction, atomic species