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水 + 氯化铁 =加热=氢氧化铁（胶体） +盐酸 ,氯化铁 +氢氧化钠 =氢氧化铁沉淀 + 氯化钠?为什么会产生一个胶体一个沉淀呢？ 信息化战争的基本内涵是什么? 哥哥姐姐们快帮帮忙吧 很急. 现有下列6种物质:a.纯碱,b.盐酸,c.稀硫酸,d.烧碱,e.二氧化硫,f.氢氧化铁 EPC项目怎么解释 Epc工程模式适合信息化项目建设吗 请解释EPC! EPC,PC、PMC、EM+PC等模式有些什么不同?谁能系统讲解一下这类项目管理模式? 哪位帮我做下化学作业者英文是在看不懂补充图片 谁懂得化工英语翻译啊?我看不懂啊. 信息化战争的作战方式有哪些? 某元素A的氧化物的化学式式量为m,氯化物的式量为n,求A的化合价? 化学类的英语,有一句看不懂……帮帮忙……各位大侠At the beginning of the 20th century there was a shortage of naturally occurring,nitrogen-rich fertilizers这句啥意思哇……哭了……就知道前面是‘在20世纪初’ 信息化战争与机械化战争相比较,作战空间扩大到五维空间对吗? 求这段英文的解释求英语达人解释下 do remeber your words.if you can make it here.you can make it anywhere. 这段英文怎么解释?I'd rather see us treat the confidence of the healthy players that have just shut down because they're scared,as opposed to keep trying to treat the impaired players - like trying to treat unemployment or foreclosures.The bes 战争时期英雄故事500字500字的,好词好句多用点. An electrical heater is used to supply 160.0 J of energy to a 30.0 g sample of water,originally at 300.0 K. Determine the final temperature in degrees Kelvin.(the specific heat capacity for water is 75.291 Jmol-1K-1)An electrical heater is used to a 英文化学题,求解A sample of an unknown biochemical compound is found to have a percent composition of 40.45 percent carbon, 7.92 percent hydrogen, 15.73 percent nitrogen and the balance oxygen. What is the simplest formula for this compound 求几道英文化学题的解答1.Draw all the structural formulae of C5H7Cl2.Explain,with the aid of a simple example,what is meant by the term structural isomer.3.State whether CH3CH2Cl is soluble in water or not,and explain why.回答也要用英 做化学实验要注重哪些事项?迷茫中! 解释这段英文Never forget say I was so thanks for all around mylife .They gives me a happy amusement!What's more ,I hope my good friends will be happy every day I'm very "love" them. 做化学实验有哪些注意事项? 英语翻译The resistors in the above circuit diagram are connectied in______. 化学英语提问.把下面的写为化学方程式1.硫在氧气中燃烧生成二氧化硫2.红磷同上3.铁同上4.镁同上5.过氧化氢同上6.氯化钾同上7.水桶直流电生成氢气和氧气英语花白 20:20:19 1.what does it____ you__ 【高一化学】在氮的单质和常见化合物中：（1）常用作保护气（如：填充灯泡、焊接保护等）的物质是：在氮的单质和常见化合物中：（1）常用作保护气（如：填充灯泡、焊接保护等）的 哪种气体可以作为焊接金属的保护气,又可以作为灯泡填充气 《高一化学》在氮的单质和常见化合物中：1.常用作保护气《如填充灯泡,焊接保护》的物质是?原因是?2.在通常情况下是晶体,易溶于水,可以做氮肥,遇碱放出带刺激性气味气体的一类物质是? 由a u e l t s o m这八个字母可以组成哪个英文单词?速度 在线等 常用作保护气(如填充灯泡)的物质是?理由? 由r e f t a组成的英文单词,中文是什么 1.He had a lat of friends,only a few of ( )invited to his wedding.A.whom B.them C.which D.who2.They put forward a lot of plans at the meeting,none of( )carried out in their work.A.which B.them C.what D.that3.On Sundays there were a lot of children pl 英语翻译8.Safety GuidelinesDo not submerse the bracelet in liquid or expose to a high amount of moisture or humidity .Do not use abrasive cleaning solvents to clean bracelet.Do not expose the bracelet to extreme temperatures high or low .Do not s