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物料供应商（）、（）、和()等可能影响质量的关键因素发生变更时，应按企业变更管理程序进行管理，结合《已上市化学药品药学变更研究技术指导原则(试行)》和《已上市中药药学变更研究技术指导原则(试行)》对供应商的变更进行评估，并根据评估结果，确定是否进行相关的验证及稳定性考察并要求供应商提前通知(一般在实施变更...
To produce iron sulfide and hydrochloric acid, the reactants iron chloride and hydrogen sulfide react together. In this reaction, 100.0 g of iron (iii) chloride (FeCl3) reacts with 54 g hydrogen sulfide. What is the balanced equation for this?
Question: What is the correct name ofFe2O3? Compounds: A compound is made up of two or more elements and can be classified as either ionic or covalent. An ionic compound is formed by a cation and anion which are positively and negatively charged, respectively. On the other hand, a cova...
The same coagulants are generally not called coagulants in the treatment of excess sludge, but are collectively referred to as conditioners or dehydrating agents. When using a flocculant, since the amount of suspended solids in the water is limited, in order to achieve full co...
C.2Fe+6HCl=2FeCl3+3H2↑D.Fe+2HCl=FeCl2+H2↑ 免费查看参考答案及解析 题目: 将水蒸气通过灼热的铁丝网,生成的物质除氢气外还有A.Fe(OH)3B.Fe(OH)2C.Fe2O3D.Fe3O4 免费查看参考答案及解析 题目: 能与酸发生置换反应的一组物质是A.Fe和CuB.Fe2O3和CuOC.Mg和ZnD.Al和Al2O3 免费查看...
C. 与FeCl3反应有络离子生成,则证明有过氧化物存在 D. 在储存醚时,可在醚中加入少许金属钠或铁屑,以避免过氧化物形成 查看完整题目与答案 沙箱工具可以进行()操作。 A. 曲面平整 B. 曲面起伏 C. 曲面投影 D. 添加细部 查看完整题目与答案 以下哪一种定量输油器通常用于向液压系统输送油液(...
What substance is present if the FeCl3 test gives a purple color? Which sample is the most impure? Unlabeled test tubes contain solid AlCl3 cdot 6H2O in one, Ba(OH)2 cdot 8H2O in another, and MgSO4 cdot 7H2O in the other. How could you find out what is in eac...
Why is FeCl3 solution used as the calibration blank rather than distilled water? What is polystyrene? What is the difference between a line spectrum and a continuous spectrum? What are the solvent distance values? Where are they measuring from? (1) Would the measured absorbance of an FeNCS^2...
李老师和朋友在回家的路上，遇到了几名向路人卖花的儿童，李老师趁机询问这些儿童的信息，但被朋友劝阻，并让她不要多管闲事，李老师回答：“这些都是应该上学的适龄儿童，我一定要了解情况，因为我是教师！”李老师的言行表明她( )