Some kinds of acids react on metals to cause ___ (化学的) changes. (根据汉语意思填空) 相关知识点: 试题来源: 解析 chemical [解析] [分析] [详解] 考查形容词。句意:有些酸对金属起反应,引起化学变化。根据名词changes可知此处要用形容词,且由汉语“化学的”可知chemical符合题意。故填chemical。反馈...
解析 答案是chemical.本题考查语境中选用恰当的词或短语;chemistry n. 化学;chemical adj. 化学的;题干中需要形容词充当changes 的定语;chemical changes化学变化;故答案是:chemical.结果一 题目 【题目】Some kinds of acids react on metalsto cause__(chemistry)changes . 答案 【解析】答案是chemical.本题考查...
How-do-acids-react-on-metals网络酸如何对金属起反应 网络释义 1. 酸如何对金属起反应 翻译词典... ... How do acids react on metals? 酸如何对金属起反应? Plants react to light. 植物对光照起反应. ... www.tdict.com|基于1 个网页
用介词to,on,against填空? (1)Plants react light.? (2)Certain acids react metals to cause chemical changes.? (3)They reacted strongly the unreasonable rules.
Recent work has raised interest in the use of a LIX®63/Versatic 10/tributylphosphate (TBP) synergistic system to separate nickel and cobalt from gangue metals. However, accelerated and undesirable degradation of LIX®63 oxime has previously been reported in the presence of strong organic acids...
网络酸和硷;酸与碱;酸硷 网络释义 1. 酸和硷 eTVonline.tv ... The Eye 眼睛Acids and Alkalis酸和硷Living Things and Air 空气与燃烧 (英文版) ... www.etvonline.ai-sol.com|基于5个网页 2. 酸与碱 书飞网英语书单“学科英... ... Chemical Reactions 化学反应(自然科学基础——化学)Acids and ...
In contrast, the formation of 3aa was largely suppressed under reaction conditions including N-heteroaromatic moieties such as an imidazole (A5) and an indole (A19), as these heteroaromatic units can react with B4b to form Lewis adducts and/or with aldehydes to complicate the system. In the...
5d). Combining the above results with the absolute S conformation of product 4a, a possible reaction mechanism was proposed in Fig. 5e. Chiral aldehyde 3i reacted with amino acid ester 1a in the promotion of Lewis acid ZnCl2, leading to the stable Schiff base-Zn complex I. Then this ...
to 0.15 equivalent of chlorine per equivalent of (A) until of the chlorine has reacted to provide a first intermediate product, (ii) continuing the reaction in the absence of chlorine at a temperature of from about 180o-250oC until a conversion of 0.4 to 1.1 equivalents of (B) per ...
metals. This approach also merges nitrene-mediated C(sp3)–H functionalization with directed C(sp3)–H functionalization without the requirement for an intermediate cyclometalation. Upon deprotonation, the carboxylic acid substrate coordinates to the iron centre and serves as the directing group, which...