Hydrogen is a clean alternative to methane, also known as natural gas.It'sthe most abundant chemical element, estimated to contribute 75% of the mass of the universe. Here on earth, vast numbers of hydrogen atoms are contained in water, plants, animals and, of course, humans. But while ...
A. Silicon atoms. B. Carbon atoms. C. Oxygen atoms. D. Hydrogen atoms. 相关知识点: 试题来源: 解析 B。解析:文章中明确提到“Graphene is an extremely thin and strong material. It is made up of a single layer of carbon atoms arranged in a hexagonal lattice.”,石墨烯是由一层碳原子组成...
How is Hydrogen Energy Produced? Hydrogen can be produced using fossil fuels, conventional sources, or some sort of renewable energy source. The most widely adopted technique is steam reforming, where hydrogen atoms are separated from methane. Electrolysis or water splitting is another technique extens...
What is the mass of a single hydrogen atom?Number of molesThe number of moles can be defined as the ratio of the given mass to the atomic mass, or it can be the ratio of the number of the particles to the Avogadro number.Answer and Explanation: ...
What is the atomic mass of hydrogen?HydrogenHydrogen has three isotopes or different versions of hydrogen. Each of the isotopes has one proton, but different numbers of neutrons. Hydrogen-1 has one proton and zero neutrons. Hydrogen-2 has one proton and one neutron. Hydrogen-3 has one proton...
Why areα-hydrogen atom of aldehydes and ketones acidic in nature? View Solution Doubtnut is No.1 Study App and Learning App with Instant Video Solutions for NCERT Class 6, Class 7, Class 8, Class 9, Class 10, Class 11 and Class 12, IIT JEE prep, NEET preparation and CBSE, UP Board...
Write the balanced equation for the following chemical reaction: Sodium + water→Sodium hydroxide + Hydrogen Propanone has the functional group: 03:00 Fill in the blanks: Two atoms of the same element combine to form a mo... 02:51
The hydrogen molecule, consisting of two hydrogen atoms, can be used to produce carbon-free energy. Hydrogen molecules carry a lot of energy; a pound of hydrogen contains almost three times the energy of a pound of gasoline or diesel. ...
What is green hydrogen, blue hydrogen, and so on? Producing hydrogen takes energy because hydrogen atoms don't exist on their own — they are almost always stuck to another atom, often another element. (On earth, hydrogen is particularly abundant in the form of water, or H2O.) Creating pu...
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...