In chemistry, the ___ point of a substance is the temperature at which it changes from a solid to a liquid. A. 现队通层处议织保形半论议天支观适养现队通层处议织保形半论议天支观适养melting现队通层处议织保形半论议天支观适养现队通层处议织保形半论议天支观适养 B. 信合信合meeting...
aRemember don’t leave so far away 记住不离开到目前为止[translate] aA base in chemistry is a substance that can accept hydrogen ions (protons) or more generally, donate electron pairs 在化学的一个基地是可能更加一般接受氢离子的物质(氢核)或,捐赠电子对[translate]...
A. The balance was not calibrated properly. B. The color of the substance was bright. C. The laboratory was too cold. D. The students were in a hurry. 相关知识点: 试题来源: 解析 A。解析:测量物质质量不一致可能是因为天平没有正确校准,A 选项正确。B 选项物质颜色亮不会影响质量测量。C 选...
In chemistry, a compound is a substance made up of two or more different chemicalelementscombined in a fixed ratio. When the elements come together, they react with each other and form chemical bonds that are difficult to break. These bonds form as a result of sharing or exchangingelectronsbe...
It is a compound that is made up of one sodium atom and one chlorine atom. It also has a uniform structure. What is a pure substance in chemistry? A pure substance is made up of one type of element or one type of compound. These substances also have a uniform structure to them with...
In the chemistry experiment, we saw a substance change color. This is called a(n) ___. A. 名干老示北规千特般观消并标名干老示北规千特般观消并标mixture名干老示北规千特般观消并标名干老示北规千特般观消并标 B. 级的水了达众得选满山级的水了达众得选满山reaction级的水了达众得选...
百度试题 结果1 题目8. A chemical change takes place in any substance when it burns. (chemistry) 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
In chemistry, concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio ofsolutein a solution to eithersolventor totalsolution. Concentration is usually expressed in terms ofmassper unitvolume. However, the solute concentration may al...
A pure substance is a classification of matter wherein its components cannot be broken down or separated by using physical methods. These methods... Learn more about this topic: Pure Substance in Chemistry | Definition, Properties & Examples ...
The greatest solvent in the world is What is a compound in chemistry? What is dissolution in chemistry? What property of water allows water to work as a universal solvent? What is molar in chemistry? What is chemistry? What is a dissolved substance called?