During a chemical reaction, the substances that react are called: A. products. B. reactants. C. catalysts. D. intermediates. 相关知识点: 试题来源: 解析 B。解析:在化学反应中,发生反应的物质叫做反应物。选项 A 产物是反应后生成的物质。选项 C 催化剂是能改变反应速率但自身在反应前后不变的物质...
During a chemical reaction experiment, if we want to measure the amount of gas produced accurately, we should use ___. A. a beaker B. a test tube C. a gas syringe D. a conical flask 相关知识点: 试题来源: 解析 C。解析:在想要精确测量化学反应产生气体量的实验中,应该使用气体注射器。
During the chemical reaction experiment, we have to ___ the concentration of the reactants precisely. A. measure B. measuring C. measured D. measurement 相关知识点: 试题来源: 解析 A。解析:本题考查动词的用法。have to后面要接动词原形,表示“不得不做某事”,选项A measure是动词原形,意为“测...
a30% of salivary malignancies 30%唾液敌意[translate] a推动中国特色社会主义事业不断前进 Impels the cause of socialism with Chinese characteristics to go forward unceasingly[translate] aduring the chemical reaction,it is necessary to continually[translate]...
A chemical reaction between mainly unsaturated fatty acids and the reactive forms of oxygen. Nutrient inflexibility A dependence on one nutrient despite the fact that multiple nutrients can lead to the production of a certain metabolite. Reductive carboxylation A metabolic pathway in which α-ketoglutara...
Dynamic chemical reaction during a chemistry lesson,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商业图片、艺术插画、矢量、视频、音乐素材、字体等,已先后为阿里巴巴、京东、亚马逊、小米、联想、奥美、盛世长城、百度、360、招商银行、工商银行等
that the net energy (H-W) liberated by a muscle up to any moment may reach large negative values during part of the cycle, while the total energy (H-W) over the whole cycle never falls below zero, is difficult to explain on any simple theory of the reversal of a chemical reaction. ...
Their values are analagous to particle numbers in a chemical reaction. The switching between continuous and discrete variables is possible as \(\frac{{\sigma }_{x}}{\langle {N}_{x}\rangle }\approx 0.035\) is small with x = 1, 2 for PCx and σx the standard deviation. We ...
this study is to investigate the students' conceptions about the reaction rate changes during the chemical equilibrium shifts and also whether the questions about basic concepts of the reaction rate are helpful for the students' understanding of reaction rate changes during the chemical equilibrium ...
A major question from that study is whether the isotope measures a true membrane diffusing capacity or is limited by back reaction. In this study we examine the diffusing capacity of doubly 18O-labeled carbon dioxide, C 18O 2, a species in which the kinetics of isotopic exchange in ...