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George orwell essays full text, comment bien faire une dissertation en francais example essay about holiday with family. Holistic assessment essay, philosophical essay structure, le plan de dissertation economique president lincoln essay guy essay tips College, master in finance essay sample, write an essay about fundamental rights. is used in many industries for basically the same purposeSumber : ptkguru.Write my essay for me in 3 hours, man and environment essay pdf. has limited industrial uses because of its dangerous properties D. has many purposes in a variety of industries C. is too dangerous to be used for industrial purposes B. It can be inferred from the passage that hydrogen A. to operate fuel cells that generate electricity D. to produce fuels such as gasoline and methyl alcohol C. The author mentions all of the following as uses for hydrogen EXCEPT A.
Oxygen is removed by combining it with hydrogen and heating it.8. Hydrogen cannot be separated from oxygen because it is too difficult. Water can be made by combining hydrogen and oxygen. It is easy to form steam by heating water. What does the author mean by the statement in lines 21-24 : Althoughit easily removed ? A. Where in the passage does the author explain why hydrogen is used as a refrigerant ? A. The combining in line 35 is closest in meaning to A. The word readily in line 22 could be best be replaced by A. By heating the hydrogen with oxygen to a very high temperature3. By heating the steel to a very high temperature D. By cooling the hydrogen with oxygen to a very low temperature C. By cooling the steel to a very low temperature B. How can hydrogen be used to cut steel ? A. To give examples of how hydrogen and oxygen2. To discuss the process of hydrogenation D. To describe the origin of hydrogen in the universe C.
To explain the industrial uses of hydrogen B. What is the authors main purpose in the passage ? A. In addition, in the chemical industry, hydrogen is used to produce ammonia, gasoline, methyl alcohol, and many otherimportant products.1. Soap manufacturers also use hydrogen for this purpose. Products such as margarine and cooking oils are changed from liquids to semisolids by combining hydrogen with their molecules. These fuels would be lighter, a distinct advantage in the aerospace industry, and they would also be cleaner, thereby reducing pollution in the atmosphere.Hydrogen is also useful in the food industry for a process known as hydrogenation. Pure hydrogen gas is used in large electric generators to cool the coils.Future uses of hydrogen include fuel for cars, boats, planes, and other forms of transportation that currently require petroleumproducts. It does not become a liquid until it reachesTemperatures of -425 degrees F. Furthermore, hydrogen is one of the coolestrefrigerants. Although it would be difficult to remove the oxygen by itself, hydrogen readily combines with oxygen to form water, which can be heated to steam and easily removed. Fuel cells toGenerate electricity operate on hydrogen and oxygen.Hydrogen also serves to prevent metals from tarnishing during heat treatments by removing the oxygen from them. In rocket engines, tons of hydrogen and oxygen are burned, and hydrogen is used with oxygen for welding torches that produce temperatures as high as 4,000 degrees F. For example, when hydrogen burns in the presence of oxygen, it forms water.The lightest and simplest of the elements, hydrogen has several properties that make it valuable for many industries.It releases more heat per unit of weight than any other fuel. Moreover, hydrogen is found in inorganic compounds.
Pure hydrogen seldom occurs naturally, but it exists in most organic compounds, that is, compounds that contain carbon,which account for a very large number of compounds. Hydrogen can combine with a large number of other elements, forming more compounds than any of the others.
Under normal conditions of temperature, hydrogen is a gas.Designated as H, hydrogen is the first element in the periodic table because it contains only one proton. It is among the ten most common elements on Earth as well and one of the most useful for industrial purposes. Contoh Soal UKG Bahasa InggrisSoal Uji Kompetensi Guru Bahasa InggrisHydrogen is the most common element in the universe and was perhaps the first to form.