水(化学式:H2O)是由氢、氧两种元素组成的无机物,在常温常压下为无色无味的透明液体。水是地球上最常见的物质之一,是包括人类在内所有生命生存的重要资源,也是生物体最重要的组成部分。水在生命演化中起到了重要的作用。人类很早就开始对水产生了认识,东西方古代朴素的物质观中都把水视为一种基本的组成元素,水是...
百度试题 结果1 题目What is the chemical symbol for water? A. H2O. B. CO2. C. O2. D. N2. 相关知识点: 试题来源: 解析 A。水的化学符号是 H2O,B 选项是二氧化碳,C 选项是氧气,D 选项是氮气。
Question: Given: H2O(l)→H2O(g),ΔH°=40.7K at 373 KWhat is the entropy change in the system ( ΔS ) when one mole of water vaporizes at 100°C and a pressure of one atmosphere?Hint ΔSsystem+ΔSsurrounding =Δ...
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【H2O】Guess what is this 只看楼主收藏回复 cccplzw 配位化学 8 送TA礼物 1楼2012-08-04 11:53回复 gh28qs 量子化学 12 固体加这么多。。 来自Android客户端2楼2012-08-04 11:59 收起回复 永恒丶一秒天堂 地球化学 7 步步高化学实验室 来自Android客户端3楼2012-08-04 12:03 收起回复 ...
夏季在低洼积水草滩放牧的羊群，放牧数天后急性发病并出现死亡，死后剖检见胆管如绳索状凸出于肝脏表面，有出血性肝炎，肝脏肿大，肝包膜上有纤维素沉积，出血，肝实质内有暗红色“虫道”，虫道内有凝血块和幼小的虫体。调查发现放牧的草滩上有大量淡水螺滋生。该羊最可能患的疾病是 ...
百度试题 结果1 题目H2O是水的化学符号 H2O is the ( )( )( )water 把What made you give up 相关知识点: 试题来源: 解析 1.chemical symbol of 2.what is made to give up English by you (改为被动后不定式省略的to要加上) 反馈 收藏
What is the formula for the hydroxide ion? What are bases that dissolve in water called? What is the result of dissociation of water? What is the formula for water? What is the conjugate base of H2O? What is the polarity of water? What is the chemical formula for carbonated water? What...
• Option A, which is Acetal, is actually a functional group. They are germinal-diether derivatives of aldehydes or ketones. Although, ketone derivatives of this kind are called Ketals. • Option B here which is Methanal, here in the case of methanal, ...
We are we being told that every parent who lost a child in the incident is sequestered by specially-appointed state troopers so that they will not be ‘bothered’ by journalists and that any contact would be prosecuted as “criminal harassment.” “It’s a time of mourning,” is the excus...