In a chemical reaction where gas is produced, before collecting the gas, we must ___. A. stop the reaction B. test the purity of the gas C. add more reactants D. change the reaction vessel 相关知识点: 试题来源: 解析 B。解析:在产生气体的化学反应中,在收集气体之前,我们必须测试气体的...
The gas produced in this chemical reaction is ___. We need to test it. A. odorless B. colorless C. tasteless D. harmless 相关知识点: 试题来源: 解析 B。本题考查化学词汇。“colorless”表示“无色的”,化学反应产生的气体需要检测,先描述其无色的特征。“odorless”是无味的,“tasteless”是无...
In a chemical reaction, bubbles are observed. Which gas is most likely produced? A. Hydrogen B. Oxygen C. Nitrogen D. Carbon dioxide 相关知识点: 试题来源: 解析 D。在很多化学实验中,产生气泡通常是由于产生了二氧化碳气体,比如碳酸钙和盐酸反应等。而氢气、氧气、氮气通常不是以产生气泡的常见形式...
Utilizing the above discovery a process has been devised by which the sulfur values present in gypsum, particularly waste by-product gypsum produced by the wet process, may be recovered as SO2 with the concurrent production of lime.HORACE EARL WILLIS...
The amounts of gas accumulated in a reservoir, as well as produced from wells and transported through pipelines, are measured by volume, calculated in either cubic metres or cubic feet. The calculations are made with reference to the volume occupied by the gas at standard atmospheric pressure (...
In recent years, reaction-sintered silicon carbide (RS-SiC) has been of interest in many engineering fields because of its excellent properties, such as its light weight, high rigidity, high heat conductance and low coefficient of thermal expansion. However, RS-SiC is difficult to machine owing...
Natural gasis the second option to hydrogen to store electricity aschemical energy. Natural gas is most populargas fuel, which mainly consists of methane (CH4).Biogas, landfill gas, SNG, and bio-SNG are the other gas fuels. Biogas is produced by decayed organic matters and contains CH4and ...
Gases that are neither metabolized nor produced (inert gases), such as nitrogen and anesthetic gases, equilibrate between capillary blood and alveolar gas or peripheral tissues in one capillary transmit time. Metabolism of O2 in a cell simultaneously with diffusion causes a marked drop in PO2 with...
The activity series can be used to predict which single-displacement reactions will take place. The elemental metal produced is always lower in the activity series than the displacing element. Thus, iron could be displaced from FeCl 2 by zinc metal but not by tin. ...
Another important role of fuel recirculation is STCR related, which elaborates that fuel recirculation provides an internal steam circuit, whereby a fraction of the electrochemically producedwater vapor, fuel and other reaction products are recirculated to the inlet. Therefore, the steam to carbon rati...