are 34 electrons and 35 protons s in the atom. Therefore‚ selenium is the No. 34 element in the periodic table‚ it is in period 4‚ group 16 which is also called the chalcogen group. The term chalcogen stands for “sulfur”‚ therefore all elements in family 16 are similar to the element sulfur. All the elements in family 16 are non-metals and all of these elements in chalcogen family have six electrons in the outermost shell so they all have the similar properties. Give a description of the physical characteristics
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dissolved‚ and this is because the shell is made form the same material as limestone‚ calcium carbonate. The acid‚ or vinegar‚ produces an immediate reaction as bubbling will occur‚ first converting the carbonate into carbonic acid and then carbon dioxide. (Article‚ Acid Rain Effects on Buildings). However some use this chemical reaction to their advantage. Architect James Galbon Rogers‚ faux-aged Yale University’s buildings by pouring acid over the walls (Yale university‚
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pressure and catalyst on the composition of the equilibrium mixture‚ with respect to Le Châtelier’s principle. THE PROCESS Firstly‚ Sulphur Dioxide (SO2(g)) is manufactured by burning Sulphur (S(s)) in air. The sulphur dioxide is then purified. S(s) + O2(g) →SO2(g) Secondly‚ Sulphur trioxide (SO3(g)) is produced by reacting sulphur dioxide with O2(g) over a vanadium(v) oxide‚ V2O5 catalyst at 450 oC and 2 atm. 2SO2(g) + O2(g) ⇌2SO3(g) Thirdly‚ oleum is formed by dissolving
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probable cause and sufficient evidence that the Mosquito Magnet® was the proximal cause of Mrs. McCool’s death. According to him there is evidence that the “Patriot Mosquito Magnet” (the McCool’s trap is an Independence model) is capable of releasing sulfur dioxide (SO2) emissions within the range consistent with induction of restrictive airways which may have caused Mrs. McCool to suffer a transient hypoxia and dizziness that in turn caused her to fall onto the pool deck and
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these irreplaceable structures forever. Many of these monuments have cultural and aesthetic value that is beyond price. Acid Rain One of the more destructive forms of pollution is acid rain. Acid rain occurs when fossil fuel emissions containing sulfur dioxide combine with moisture in the air to form acidic precipitation. When acid rain falls on historical monuments of limestone or marble ‚ a chemical reaction takes place which has a corrosive effect on these structures. The reaction dissolves the material
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know that average battery cost for electric cars is between $18‚000 and $20‚000? Also‚ these cars produce significant more amounts of sulfur dioxide compared to traditional internal combustion engines‚ and what about the factories that burn billions of tons of coal everyday to produce electricity to charge these cars? Yes‚ these cars do produce little carbon dioxide directly‚ but the main source of pollution comes indirectly from the power plants that power these cars. Electric cars are not the best
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The Elizabethan Era Medicine and Alchemy The medicinal practices and problems of the Elizabethan Era were very important to the people‚ although they are very different from those of today. There were many different beliefs and diseases‚ like the Plague. Medicine was not an exact science and was related to Alchemy (Chemistry). Here‚ some of the many practices and beliefs of the Elizabethan Era will be discussed. One of the most widely known and important of the beliefs was the humours. It
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What Causes Acid Rain? {2} {2} Acid rain caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into air. These substances can rise very high into the atmosphere‚ where they mix and react with water‚ oxygen‚ and other chemicals to form more acidic pollutants‚ known as acid rain.{2} Sulfur dioxide and nitrogen oxides dissolve very easily in water and can be carried very far by wind. As a result‚ the two compounds can travel long distances where
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BEL 492 (Individual Presentation) Speech 1 Student’s name : Nur Nadirah binti Mohd Din Faculty/ Group : Business Management (BM2223A) Lecturer’s name : Madam Suchitra Title : ACID RAIN Order : Topical Order General Purpose : To inform Specific purpose : Acid rain is harmful to environment that it can damage everything over a period of time because it makes the living things in the environment die. Central idea : To inform my audience about the causes‚ effects and
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in the combustion engines of vehicles and electrical power stations also releases large amount of carbon dioxide into the atmosphere. * Human activities such as open burning cause severe smog and haze. * Industrial plants and factories also pump large amount of carbon monoxide‚ oxides of nitrogen and sulphur dioxide into the atmosphere. * Both oxides of nitrogen and sulphur dioxide can combine with water vapour in the atmosphere to form nitric acid and sulphuric acid respectively.
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