Hydrogenation is a chemical reaction between molecular hydrogen and an element or compound, ordinarily in the presence of a catalyst. The reaction may be one in which hydrogen simply adds to a double or triple bond connecting two atoms in the structure of the molecule or one in which the addi...
Hydrogen is a clean alternative to methane and is the most abundant chemical element, estimated to contribute 75% of the mass of the universe. Find out why hydrogen is important as a future clean energy source to fuel our homes and businesses.
Hydrogenation reduces the number of double and triple bonds in hydrocarbons, while dehydrogenation removes hydrogen atoms and increases the number of double and triple bonds. Hydrogenation is a chemical reaction that adds hydrogen to a molecule. Hydrogenation is not thermodynamically favorable at ordinary ...
Verb1.hydrogenate- combine or treat with or expose to hydrogen; add hydrogen to the molecule of (an unsaturated organic compound) alter,change,modify- cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "Th...
___ chemical analysis shows that water is made up of hydrogen and oxygen. A.ProspectiveB.ProvocativeC.QualitativeD.Quantitative 答案 C[解析] 形近易混词辨析。这四个选项的词性都是形容词,其中prospective表示“预期的;盼望中的;未来的”;provocative表示“挑衅的;挑拨的;刺激的”;qualitative表示“性质上...
A. chemical B. physical C. biological D. geological 相关知识点: 试题来源: 解析 A。氢气和氧气反应生成水是化学变化。B 选项 physical 是物理变化;C 选项 biological 是生物变化;D 选项 geological 是地质变化,都不符合题意。反馈 收藏
Re: Is hydrogen always diatomic? «Reply #1 on:August 05, 2018, 03:23:54 PM » H+and H are two different things. Logged ChemBuddychemical calculators - stoichiometry, pH, concentration, buffer preparation,titrations.info Enthalpy
( ) 1. What is the chemical symbol for hydrogen? A. H2 B. Hg C. He D. H 相关知识点: 试题来源: 解析 ( ) 1. D ( ) 2. C ( ) 2. Which of the following is a physical change? A. Burning of paper B. Rusting of iron C. Dissolving sugar in water D. Cooking an egg 答案...
What is renewable hydrogen? Renewable hydrogen is hydrogen derived from water. It’s created using a process called electrolysis, wherein electricity from renewable sources is used to split the hydrogen molecules from the oxygen molecules in water. Because the electricity used here comes from renewabl...
to C20 hydrocarbons are dehydrogenated in a process wherein the hydrogen produced is separated from the gaseous reaction mixture by contacting the reaction mixture with one side of a membrane selectively permeable to hydrogen, the unconverted reactants being further reacted to produce more hydrogen....