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利用质量守恒定律的内涵和外延,解决初中化学的有关问题,会显得简单明了.本文就如何利用质量守恒定律解决初中化学问题归纳如下.一、解释有关的化学现象例1镁在空气中燃烧,为什么生成的固体质量比镁带质量增加了.解析:镁在空气中燃烧发生反应的化学方程式为2Mg+O_2(?)2MgO,根据质
Using the connotation and extension of the law of conservation of mass to solve the problems related to junior high school chemistry will appear simple and clear. This article summarizes how to use the law of conservation of mass to solve junior high school chemistry problems. I. Explain the relevant chemical phenomena Example 1 Magnesium burns in the air, Why the mass of solid produced is higher than that of magnesium strip. Analytical: The chemical equation for the reaction of magnesium burning in air is 2Mg+O2(?)2MgO.