根据化学式的计算是初中化学计算的基础知识,也是中考的热点内容。新课改实施后,各省市大多以科技、生活、时事为背景对这部分内容进行命题,题型新颖有趣,学生在解题的同时能够开拓 Calculated according to the chemical formula is the basic knowledge of junior high school chemistry calculation, is also a hot spot in the examination. After the implementation of the new curriculum reform, most provinces and cities propositions on this part of the contents of science and technology, life, current events, new and interesting questions, students solve problems at the same time to open up