The substance, is always produced when an active metal reactswith water. ( )A. H⏫B. H⏫OC. NaOHD. CO⏫E. O⏫ 相关知识点: 试题来源: 解析 A 活泼金属(如Na、K等)与水反应的典型产物是氢气与对应的碱。例如,钠与水反应生成NaOH和H₂,反应式为:2Na + 2H₂O → 2NaOH + H...
- lime used for making33 was absorbed - trees were unable to take in necessary iron through their roots (ii) 'Bell-miner Associated Die-back' · Cause -34 feed on eucalyptus leaves - they secrete a substance containing sugar - bell-miner birds are attracted by this and keep away other ...
waterproperties of watermodular condition of waterAt this lesson pupils get acquinted with water and its properties. Make experiments with this substance. Pupils together with the teacher prove presence of water at live organisms, its vital necessity for all objects of wildlife.Malova I. A...
A component which is present in large amount is called solvent while the one present in lesser amount is called solute. The solute present in soda water is ACO BH2O CCO2 DH2CO3Submit If one mole of a substance is present in 1kg of solvent then AIt shows molar concentration BIt ...
2英语翻译求将下面这段句子翻译成中文,专业词汇如果不知道直接打出即可,water hae been called the universal solvent beacuse so many different substances dissolve in it .however,there are maney liquid used as solvent in a wide range of products.substance that disslove in one solvent do not necessarily...
It's no small task to give waste fishing nets a second ac.The nets are typically made of a substance called nylon which tends to dramatically degrade(降解) the longer it sits in the ocean and is exposed to the sun. "This makes it nearly impossible to use abandoned fishing nets directly...
When water freezes into ice, it undergoes a phase change; it turns from a liquid into a solid. Physicists traditionally declare the phase of a substance when it's at equilibrium. This means the substance is in a stable state, and significant ...
英文:Activated carbon removes pollutants from water by means ofadsorption. 吸收(absorption):指物质穿透或进入另一物质内部的过程,典型应用包括液体被多孔物质吸收、光或能量的吸收等。例如: 中文:吸光剂为对可见光有较强吸收作用的深色物质。 英文:The lightabsorberis a dark substance having strongabsorptionof...
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1我想知道matter与substance在化学上意思的区别,我的书里面有这么几句"The world around us is made up of matter.Matter is anything that occupies space and has mass.Everthingwe see,touch,taste,or smell is matter.""One particular type of matter is called a substance .Iron,water and air are exam...