A substance that speeds up a chemical reaction without being consumed is called___. A. reactant B. product C. catalyst D. solute 相关知识点: 试题来源: 解析 C。解析:加快化学反应但自身不被消耗的物质叫催化剂。选项 A 反应物会被消耗;选项 B 产物是反应生成的;选项 D 溶质不是起这个作用。反...
In any chemical reaction, what is the name of the substances formed? What is the starting material in a chemical reaction? A chemical substance that results from the combination of two or more atoms is called? What is the starting material in a chemical reaction called?
a对...起到重要作用 To….Plays the vital role[translate] aa substance that increases the rate of a chemical reaction without being permanently changed consumed is called 增加一个化学反应的率,不用永久被改变被消耗的物质叫[translate]
In a chemical reaction, the amount of substance G is twice that of substance H. If there are 8 grams of substance H, how many grams of substance G are there? A. 4 grams B. 8 grams C. 16 grams D. 32 grams 相关知识点:
Disclosed is a method for carrying out a chemical reaction in a reactor, at least one substance is present in a container that is closed in a gas-tight manner, is introduced into the reactor in said container and is released by breaking open the container. The container is designed such ...
解析 C。本题主要考查摩尔的概念。摩尔是物质的量的单位,1 摩尔物质含有阿伏伽德罗常数个微粒。选项 A 克是质量单位;选项 B 升是体积单位;选项 C 微粒,1 摩尔物质含有阿伏伽德罗常数个微粒,所以与摩尔有对应关系;选项 D 千克是质量单位。反馈 收藏
A chemical reaction is a process that involves rearrangement of the ionic or molecular structure of a substance. The reaction caused by the mento dissolving in the diet coke can be classified as a physical change due to the process of nucleation. Nucleation is the the initial process that ...
How does new substance form in a chemical reaction? 03:02 Define combination reaction 02:30 What is the use of slaked lime? 00:53 Write chemical formula for marble 00:46 What do we get on the combustion of natural gas? 00:53 Write formula for ferrous sulphate 01:01 What is formed of...
Combustion reaction is a chemical reaction that occurs when a substance reacts with oxygen to produce heat and light. Combustion reactions are very important in our daily lives. For example, when we burn wood or coal, a combustion reaction takes place. The conditions for a combustion reaction ...
One or more new substances are formed in a chemical change. View Solution A substance is transformed after a chemical change. View Solution Select the correct answer from the choice in bracket to complete each sentence. A change in which matter undergoes a change but the total mass of substanc...