What Affects the Rate of Reaction?
What is the name of the substance that changes the rate of a chemical reaction without being consumed? A. Reactant B. Product C. Catalyst D. Solute 相关知识点: 试题来源: 解析 C。这里考查“catalyst”(催化剂)的概念,它能改变反应速率但自身不被消耗。选项 A“reactant”是反应物;选项 B“...
given off per minute / more gas given off per unit time / less time for same amount of gasgoes slower / less hydrogen given off per minute / less gas given off per unit time / more time for same amount of gassubstance which speeds up a reaction ALLOW: changes the rate of reaction ...
Features of rate of reaction are given below: 1. The rate of reaction is equal to the change in concentration divided by the time interval in which that change has taken place. 2. The rate of reaction can be expressed in terms of any reactant or product. 3. As concentration of react...
In a chemical reaction, what will slow down the reaction rate? A. Increase surface area B. Higher temperature C. Decrease the amount of reactants D. Add an inhibitor 相关知识点: 试题来源: 解析 D。增加反应物的表面积和升高温度会加快反应速率。减少反应物的量不一定会明显减慢反应速率。添加...
题目【题目】7. The rate expression of a reaction is: rate =k[ A][ B][C]. What is the unit of k?()A. moldm^(-3)s^(-1) B. s-1C. mol^(-2)dm^6s^(-1) D. mol^(-1)dm^3s^(-1) 相关知识点: 试题来源: 解析 【解析】C ...
A. The temperature decreased. B. The concentration of reactants increased. C. The catalyst was removed. D. The pressure remained unchanged. 相关知识点: 试题来源: 解析 B。本题考查影响反应速率的因素。A 选项温度降低通常会使反应速率减慢;C 选项移除催化剂会降低反应速率;D 选项压力不变一般对反应...
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
百度试题 结果1 题目2.What is the first-order rate constant for a reaction that is36,5% complete in 0,0200 seconds? c a. 50,4s^(-1) b. 27.7s^(-1) c. 22.7s^(-1) d. 9.86s^(-1) 相关知识点: 试题来源: 解析 c 反馈 收藏 ...
The rate of a reaction actually measures the rate at which a reaction proceeds. i.e., it tells you the amount of reactants left or that reacted as a function of time. The rate constant is something that you need to incorporate in the rate equation in order to find out reaction rate...