1.利用“原子守恒关系”配平方程式对于简单的化学反应,通过观察反应物、生成物之间的关系,借助原子守恒关系即可配平。例1汽车尾气中通常含有CO、NO等污染气体,在一定条件下,使二者反应转化为无毒气体,写出该反应的化学方程式。解析由组成元素及物质性质可知,CO与NO反应生成的无染污气体为CO_2与N_2。由原子守恒关系,该反应的化学方程式为2CO+2NO2CO_2+N_2 1. Using the “atomic conservation relationship” formula for simple chemical reactions, by observing the relationship between reactants, products, with the atomic conservation can be balanced. Example 1 Vehicle exhaust usually contains CO, NO and other pollutants, under certain conditions, the two reactions into non-toxic gases, write down the chemical equation of the reaction. Analyzed by the composition of the elements and material properties can be seen, CO and NO generated by the reaction of non-pollutant gases CO_2 and N_2. By the atomic conservation relationship, the reaction of the chemical equation 2CO +2 NO  2CO_2 + N_2