The rate of the chemical reaction in the experiment mentioned in question 17 is the ___. A. independent variable B. dependent variable C. control variable D. constant variable 相关知识点: 试题来源: 解析 B。在这个实验中,化学反应速率是因变量,因为它随着温度这个自变量的变化而变化。选项 A 是自...
A. lowering the temperature. B. decreasing the concentration of reactants. C. adding a catalyst. D. reducing the pressure. 相关知识点: 试题来源: 解析 C。解析:添加催化剂可以提高化学反应的速率。选项 A 降低温度通常会使反应速率减慢。选项 B 降低反应物浓度也会使反应速率减慢。选项 D 降低压力对...
A. decreasing the temperature B. decreasing the concentration of reactants C. adding a catalyst D. increasing the volume of the container 相关知识点: 试题来源: 解析 C。添加催化剂可以增加化学反应的速率。选项 A 降低温度通常会降低反应速率;选项 B 降低反应物浓度会降低反应速率;选项 D 增加容器体积...
increasing the concentration of reactants C. removing the catalyst D. decreasing the pressure 相关知识点: 试题来源: 解析 B。本题考查影响化学反应速率的因素。A 选项降低温度会减慢化学反应速率。B 选项增加反应物浓度可以加快化学反应速率,符合题意。C 选项移除催化剂会减慢化学反应速率。D 选项降低压力对...
We need to measure the ___ of the chemical reaction in the experiment. A. rate B. speed C. velocity D. frequency 相关知识点: 试题来源: 解析 A。本题考查化学名词“rate”的用法。“rate”侧重于表示化学反应的速率,“speed”通常指物体移动的速度,“velocity”更强调物理上的速度,“frequency”指...
百度试题 结果1 题目The rate of a chemical reaction depends ___ many factors. A. on B. in C. at D. for 相关知识点: 试题来源: 解析 A。depend on 是固定搭配,表示“取决于”。反馈 收藏
Adding a catalyst can ___ the rate of a chemical reaction. A. raise B. lower C. double D. affect 相关知识点: 试题来源: 解析 D。本题考查词汇及对催化剂作用的理解。raise 通常用于“提升,提高(数量、水平等)”。lower 表示“降低”,催化剂不是单纯地提高或降低反应速率。double 意思是“加倍”...
A. lowering the temperature B. decreasing the concentration of reactants C. adding a catalyst D. increasing the volume of the reaction vessel 相关知识点: 试题来源: 解析 C。本题考查影响化学反应速率的因素。添加催化剂可以降低反应的活化能,从而加快化学反应速率。降低温度会使反应速率减慢;减小反应物...
In a research on how temperature affects the rate of a chemical reaction, if we increase the temperature by 10 degrees each time, what should we keep constant? A. The amount of reactants B. The shape of the container C. The color of the reactants D. The person who conducts the E....
reactionratechemicalkinetics化学反应动力学 The Rate of a Chemical Reaction: Chemical Kinetics A.P. Chemistry Purpose: To determine the rate law for the reaction: H2O2 + 2I- + 2H+ I2 + 2H2O The rate law will take the form: Rate = k[H2O2][I-][H+] Background: Two important questions...