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一道中考题的解法比较江苏省海门市东洲中学周宇飞１９９７年南通市中考化学试卷第３２题是：有一包ＦｅＳＯ４和Ｆｅ２（ＳＯ４）３的固体混合物，已测得含铁元素的质量分数为３１％，则混合物中硫元素的质量分数是。根据我市的试卷抽样分析，本题在所有考题中是得分率最...
A solution to the problem of a middle school entrance exam Dongshu Middle School in Haimen City, Jiangsu Province Zhou Yufei 1997 Nantong City College Chemistry Examination Paper Item 32 is: There is a solid mixture of FeSO4 and Fe2(SO4)3. The mass fraction of iron is measured as 31 %, then the mass fraction of sulfur in the mixture is. According to the sample analysis of the city’s examination papers, this question is the highest score in all questions...