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江苏“小高考”化学计算考查热点包括关于NA的计算;三守恒(质量守恒、得失电子守恒和电荷守恒)的应用;多步反应的计算(连续反应和平行反应)寻找量的关系.一、关于NA的计算关于NA的计算是“小高考”选择题中的一种常见的题型,虽然原理不复杂,但出题者在设置问题时,在一些细节上设置了障碍,学生稍不注意就会失分.常见的陷阱如下.1.条件(1)只要看到体积就用22.4 L/mol,也不管是否为标准状
Jiangsu “Small College Entrance Examination ” hot spots for chemical calculation examination include the calculation of NA; three conservation (conservation of mass, conservation of electronic gains and losses and conservation of charge); multi-step reaction calculation (continuous reaction and parallel reaction) to find the relationship. First, the calculation of NA NA calculation is a common type of question in the “multiple entrance” multiple choice questions, although the principle is not complicated, but the question maker in setting the problem, set some obstacles in some details, The students lose a little if they do not pay attention. Common pitfalls are as follows: 1. Conditions (1) Use 22.4 L / mol as long as the volume is seen,