What is the chemical symbol for water?A) H2OB) CO2C) NaClD) O2 相关知识点: 试题来源: 解析 A) H2O 1. **选项A分析**:水(H₂O)由两个氢原子(H)和一个氧原子(O)组成,符合水的分子结构,选项正确。2. **选项B分析**:CO₂是二氧化碳的化学式,与水的组成无关,错误。3. **选项C分析**...
H2O是水的化学符号 H2O is the ( )( )( )water 把What made you give up learning english改为被动 答案 1.chemical symbol of2.what is made to give up English by you (改为被动后不定式省略的to要加上)相关推荐 1H2O是水的化学符号 H2O is the ( )( )( )water 把What made you give up ...
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...
What is the so-called Disorder Energy? Degree of disorder:- The law of thermodynamic states that as one goes forward in time the degree of disorder of an isolated system will always increase and if affects all aspects of our daily lives. ...
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It is the tallest water feature in the Grand Canyon, rising 190 feet above the surface. Named after an explorer in the 1800s, Mooney Falls is accessible only by crawling(爬) through 2 underground passages and then climbing down sheer cliff(峭壁)face with just a couple of chains to hold ...
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What is the correct name for CaSO4⋅2H2O? a. none of these b. calcium sulfate dihydrate c. calcium sulfide dihydrate d. calcium sulfur hydrate Naming Ionic Compounds: Ionic compounds are named for the ions that ma...
These are much weaker than the chemical bonds but are essential in determining the overall property of the compound. For instance, the fact that water has a higher boiling point than methanol even though methanol has a higher molar mass is explained by the IMFA present....