Water is a compound that contains hydrogen and oxygen. 或者Water is a compound made up of two elements-- hydrogen and oxygen.又或者Water is composed of elements hydrogen and oxygen.这上面有几个词都可以拿出来灵活运用以省略引导词汇如“that”和“which”,让句子的语感更通顺。希望有帮到你^^ ...
题目Which substance is a compound? A. Oxygen B. Hydrogen C. Water D. Nitrogen 相关知识点: 试题来源: 解析 C。本题考查化合物的概念。A 选项氧气、B 选项氢气、D 选项氮气都是单质;C 选项水是由氢和氧两种元素组成的化合物。反馈 收藏
Which of the following is a chemical compound? A. Oxygen B. Hydrogen C. Water D. Nitrogen 相关知识点: 试题来源: 解析 C。本题考查化学化合物的概念。氧气(Oxygen)、氢气(Hydrogen)和氮气(Nitrogen)都是单质,水(Water)是由氢和氧两种元素组成的化合物。
higher, it includes the process which forms the suspensoid which includes water extract phase and the glycol ether raffinate phase which contain the portion of the hydrophilic organic compound and the process which separates this glycol ether raffinate phase, from water extract phase to this method....
Which compound has the best water solubility? ( ) A. 1-octanol B. ethanol C. ethyl chloride 如何将EXCEL生成题库手机刷题 如何制作自己的在线小题库 > 手机使用 分享 反馈 收藏 举报 参考答案: B 复制 纠错 举一反三 在φ244.48mm套管的回接过程中,紧扣扭矩应当是多少? A. 13kN B. 30...
Answer to: Decide whether the given compound is likely to be water-soluble. Indicate which ions are present in the solution for the water-soluble...
soluble. I had experience in the past with trying to improve the water solubility of some analogs. The solution ended up being to incorporate a trifluoromethyl group. I was simply copying a literature report that these compounds improved water solubility. I simply took this as an empirical fact...
What type of compounds always contain carbon and hydrogen? What is livermorium and hydrogen combined called? What kind of chemical compound do salt and water form? What is the formation of an ionic compound? Which compound has the strongest hydrogen bonding at STP? What charge does hydroge...
and any diolefinic compound which is soluble in the principal monomer and similarly resists decomposition by water may serve as a 通常,所有水溶monoolefinic化合物是适当的作为主要单体在发明过程中,如果他们不在水面前电离也不否则分解,并且是可溶解的在主要单体和相似地的所有diolefinic化合物由水抵抗分解也许...
Water-soluble monoazo compounds having fiber-reactive dyestuff properties which correspond to the general formula <IMAGE> (1) in which M is a hydrogen atom or an alkali metal, D is a group of the general formula (2a), (2b) or (2c) <IMAGE> (2a) <IMAGE> (2b) <IMAGE> (2c) in ...