Water, substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. It is one of the most plentiful of compounds and has the important ability to dissolve many other substances, which was essential to
2) chemical bond water 化学结合水 1. Studies on hydration heat, breakage strength and content of chemical bond water in cement-gangue compound neat mortar show that amount of gangue blended in cement mortar and its activation degree play important role in hydration process of cement/gangue ...
water itself chemical compound, their production method and their use in catalyst support systems for the production of polyolefinsA salt-like chemical compound of the formula (I),(C6R<1>5)3MR<2> (I)where R<1 >are identical or different and are each a hydrogen atom, a halogen atom, ...
1.Studies on hydration heat, breakage strength and content of chemical bond water in cement-gangue compound neat mortar show that amount of gangue blended in cement mortar and its activation degree play important role in hydration process of cement/gangue compound system.通过对掺煤矸石水泥复合净浆...
Chemical formula: Expression of the composition or structure of a chemical compound. 化学式: 化合物的组成或结构的任何一种表达式的总称. 互联网 Thechemical formulafor water is H 0? 水的化学分子式是H0? 互联网 Fructose fruIt'sugar : Organic compound, one of the simple sugars ( monosaccharides )...
Theresultshowsathinlayerofchemicalcompoundwithmanyholesonthesurface. 分析结果表明,在工件表面上形成一层很薄的多孔化合物层。 www.chemyq.com 10. Themostfrequentlydetectedchemicalcompoundiswater(HOH)withoxygen(O)asoneofitsatoms. 最常检测到的化学化合物是(HOH),氧(O)是它的一个原子。
Chemical compound, any substance composed of identical molecules consisting of atoms of two or more chemical elements. All the matter in the universe is composed of the atoms of more than 100 different chemical elements, which are found both in pure form
题目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。
英['kemɪk(ə)l] n.化学品;化学制品 adj.与化学有关的;化学的;用化学方法制造的;化学作用的 网络化工;化学药品;化学物质 复数:chemicals 搭配 同义词 adj.+n. chemical composition,chemical fertilizer,chemical agent,chemical pollution,chemical weapon ...
But even a“common”element such as calcium Ca that is normally the main cation of surface-and shallow groundwater can be harmful.As an element of biologic importance it is an essential compound e.g.in bones and teeth.Drinking water should not have concentrations below 25mg/L in order to ...