In a chemical reaction, we need to find a catalyst. Which of the following is often used as a catalyst? A. Platinum B. Gold C. Silver D. Copper 相关知识点: 试题来源: 解析 A。解析:Gold(黄金)、Silver(白银)、Copper(铜)虽然都是金属,但它们在一般情况下不作为常见的催化剂。Platinum(铂)...
What is the effect of using a catalyst on the reaction rate? A. Decrease it B. Increase it C. Have no effect D. Depend on the reaction 相关知识点: 试题来源: 解析 B。解析:催化剂能够降低反应的活化能,从而加快反应速率。反馈 收藏
A. The catalyst was not in its active form, for example, it needed to be pre - treated but was not. B. The amount of catalyst used was too large, causing it to have a negative effect on the reaction rate. C. The reaction rate was measured inaccurately, and the actual reaction rate...
17 In separate experiments, a catalyst is added to a reaction mixture and the temperature of the B mixture is decreased.What are the effects of these changes on the rate of the reaction?catalyst temperature added decreased Afaster faster Bfaster slower Cslower faster Dslower slower 相关知识点...
cat·a·lyst (kăt′l-ĭst) n. 1.ChemistryA substance, usually used in small amounts relative to the reactants, that modifies and increases the rate of a reaction without being consumed in the process. 2.One that precipitates a process or event, especially without being involved in or...
In polymer 1 the c... F Cacialli,WJ Feast,RH Friend,... - 《Polymer》 被引量: 34发表: 2002年 Carbon-catalysed reductive hydrogen atom transfer reactions Generally, transition metal catalysts are essential for the reductive hydrogen atom transfer reaction, which is also known as the transfer...
If the software version running on your device is Cisco IOS XE 3.11.3aE or a later release, using the legacy command can cause authentication failures. Use the tacacs server command in global configuration mode. RADIUS Server legacy command: In Cisco IOS XE Release 3.8.7E, the legacy ...
(b)In reaction 3 the organic molecule reacts with HCN and a KCN catalyst.(i) Complete the diagram to show the mechanism of the reaction occurring.Include all relevant dipoles, lone pairs and curly arrows in your answer.H HH T C =O H3 C - C -O H3 C - C -OH H3C CN CN cO NH...
of TCCA was used (entry 4), while a further decrease in the quantity of TCCA had a negative impact on the reaction (entry 5). Table 1 Optimisation of reaction conditions. Full size table After determining the appropriate quantity of TCCA, in the next step the stoichiometric quantity of ...
Chemical reaction network and systems biology interface for scientific machine learning (SciML). High performance, GPU-parallelized, and O(1) solvers in open source software. - SciML/Catalyst.jl