(通用版)2019版高考化学二轮复习选择题命题区间2物质的量课件.ppt

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选择题命题区间2 物质的量,NO.1 历年真题集中研究 明考情,考向二 以物质的量为中心的计算,考情 考法,分析,NO.2 两大考点重点攻坚补短板,考点一 阿伏加德罗常数(NA)的正误判断,必备知识要,清,解题思路要,明,(一),高考考什么3大考查角度,审题看什么研究对象 及状态,(二),解题怎么办3步解题流程,(三),对点训练,考点二 以物质的量为中心的计算,化学方程式计算的基本步骤,(一),写出简明答案,六答,根据比例式求出n,再求m、V或c,五解,将有关的四个量列出比例式,四列,找出相关物质对应的化学计量数,从而找出相关物质的物质的量之比,三找,写出有关的化学方程式,二写,设所求物质的物质的量为n,一设,化学计算的2种常用技法,(二),对点训练,对点训练,

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