A4 The table below shows the melting and boiling polnts of four pure substances.Which substance is a liquid at room temperature and would rapidly evaporate if left exposed to the air?B substance melting point / C boiling point/C合-100-35758S-622544280 相关知识点: 试题来源: 解析 B 反...
解析 CA compound is made up of 2 or more elements chemically combined. It has different properties from the elements it is made of. It is a pure substance with fixed melting and boiling points. It can only be separated by chemical means. ...
Yes,gold is a pure substance. It is composed of just the element Gold, and there are no other substances required for it to exist. Is Salt a mineral? salt (NaCl),sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. The mineral form...
It has a bulb at one end which contains shining liquid mercury. Outside the bulb, a small thread can be seen in which mercury can flow. It has a scale marked from 35°C to 42°C. What are thermometric materials? The thermometric substance is the material used in the thermometer, whose...
aFuck Japan爱装逼的ese..You are bitch..The future is in cancer patients Fuck Japan loves ese which the attire compels. You are bitch. The future is in cancer patients[translate] aDiamond is the hardest natural substance which is known 金刚石是知道的最坚硬的自然物质[translate]...
Which substance has dipole-dipole forces? a. CO_2 b. NCl_3 c. CBr_4 d. CS_2Which of the following pure substances exhibits dipole-dipole attraction between molecules? a. XeF4 b. AsH3 c. CO2 d. BCl3 e. Cl2Which of these has dispersion forces and ...
然而西药解决了这个问题 The pure natural raw material as well as the plant, do not have the chemical substance as well as to the human body harmful material, does not have the side effect to the human body, but some plants are not even very are very generally precious, meets the too ...
aAs was pointed above,this substance can be used as a substitute. 象针对性的上述,这种物质可以使用作为替补。 [translate] aradioactive sodium 22 was an important "tool" in working out the chaeacteristics of the sodium chloride metabolism 正在翻译,请等待... [translate] a告诉我正确的 正在...
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…doi:EP0397550 A1HAINAUT LAURENTEPEP0397550A1 1990年5月4日 1990年11月14日 Raison Pure S.A. Case for a stick of non-liquid substance which is applied to a surface by means of rubbing