Draw the product formed from a Michael reaction with the below starting materials using -OEt, EtOH. What is the starting material in the reaction shown below? a) I b) II c) III d) IV What is the starting material for this reaction? Show all intermediates. ...
The substance that speeds up a chemical reaction without being consumed itself is a ___. A. product B. reactant C. catalyst D. solvent 相关知识点: 试题来源: 解析 C。catalyst 是催化剂,能加快化学反应速度但自身不被消耗;product 是产物;reactant 是反应物;solvent 是溶剂。所以选催化剂。反馈...
The substance that speeds up a chemical reaction without being consumed in the reaction is called a ___. A. catalyst B. reactant C. product D. solvent 相关知识点: 试题来源: 解析 A。解析:“catalyst”是催化剂,能加快化学反应速率而自身在反应中不被消耗;“reactant”是反应物;“product...
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
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: 试题来源: 解析 C。G 的量是 H 的两倍,H 有 8 克,所以 G 有 16 克。反馈 收藏
In a chemical reaction, a substance that participates in the reaction and is consumed is called a ___. A. product B. reactant C. catalyst D. solvent 相关知识点: 试题来源: 解析 B。reactant 是反应物,在化学反应中参与反应并被消耗;product 是产物;catalyst 是催化剂;solvent 是溶剂。根据题...
The substance that speeds up a chemical reaction without being consumed in the reaction is called a ___. A. catalyst B. reactant C. product D. solute 相关知识点: 试题来源: 解析 A。catalyst 是催化剂,能加快化学反应速率但自身在反应前后不被消耗;reactant 是反应物;product 是产物;solute...
The substance that can speed up a chemical reaction without being consumed is called ___. A. reactant B. product C. catalyst D. solvent 相关知识点: 试题来源: 解析 C。解析:能加快化学反应速率而自身在反应前后不发生变化的物质叫做催化剂(catalyst)。反应物是(reactant),产物是(product),溶剂是(...
The substance that speeds up a chemical reaction without being consumed itself is called: A. Reactant B. Product C. Catalyst D. Substrate 相关知识点: 试题来源: 解析 C。加快化学反应速率但自身不被消耗的物质称为催化剂(Catalyst)。“Reactant”是反应物;“Product”是产物;“Substrate”在酶促反应...
In a certain chemical reaction, the amount of a substance increases by a factor of 4 every 5 minutes. If the initial amount was 10 grams, how much will there be after 15 minutes? A. 160 B. 640 C. 40 D. 1600 相关知识点: