Clays are one of the important natural materials‚ which have been examined for catalytic applications. Clays are characterized by a layered structure and hence they are slippery when wet. They are broadly classified as cationic or smectite type (having layer lattice structure in which two-dimensional oxyanions are separated by layers of hydrated cations) and anionic or brucite type (in which the charge on the layer and the gallery ion is reversed complimentary to smectite type). Anionic clays are
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each bottle would most readily enable the bottles to be correctly relabelled? A B C D ammonia hydrochloric acid lead(II) nitrate sodium hydroxide © UCLES 2011 5070/11/O/N/11 3 3 Oxygen was prepared from hydrogen peroxide‚ with manganese(IV) oxide as
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by train or bus‚ they will spend more time on the way. Admittedly‚ with the popularity of cheap air travel‚ more consumption of fuel may lead to pollution of surroundings and degradation of air quality. Pollutants (e.g.‚ sulfur dioxide and nitric oxide) will damage our living circumstance. However‚ any transport tools have fuel consumption. The authorities have taken measures to alleviate this problem. To sum up‚ although there may be some fuel depletion‚ taking the clear benefits-- economical
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atmospheric condition i.e.‚ moist air‚ carbon dioxide form undesirable compounds on the surface is known as corrosion. The compounds formed are usually oxides. Rusting is also a type of corrosion but the term is restricted to iron or products made from it. Iron is easily prone to rusting making its surface rough. Chemically‚ rust is a hydrated ferric oxide. Rusting‚ an electrochemical mechanism: Rusting may be explained by an electrochemical mechanism. In the presence of moist air containing dissolved
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EFFECT OF POLLUTION ON HERITAGE STRUCTURE ‘JANTAR MANTAR ‚DELHI.’ Abstract : This write up is a synopsis to the dissertation ‚‘Effect of pollution on Delhi heritage structure Jantar Mantar.’ It gives an overview of the contents that the final research paper is likely to cover the effect of different types of pollutions like air ‚light‚ sound etc. & pollutants on the materials used for construction of Jantar Mantar
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aluminum oxide. b. Sodium oxide reacts with carbon dioxide to form sodium carbonate. c. Calcium metal reacts with water to form calcium hydroxide and hydrogen gas. d. Potassium nitrate decomposes to form potassium nitrite and oxygen. e. Barium metal reacts with Iron (III) sulfate to produce barium sulfate and iron metal. f. Barium chloride reacts with sodium sulfate to produce barium sulfate and sodium chloride. g. Bismuth (III) oxide and zinc metal react to produce zinc (II) oxide and bismuth
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55% S‚ 47.01% O What mass of calcium bromide is needed to prepare 150.0 mL of a 3.50 M solution? (Assume that the molecular weight of CaBr2 is 200.618 g/mol) 105 g Nitrous oxide (N2O)‚ or laughing gas‚ is commonly used as an anesthetic in dentistry and surgery. How many moles are present in 8.4 liters of nitrous oxide at STP? 0.375 moles How many moles of gas molecules will be present in 5000 L of air at STP? 223.2 mol How many molecules are in 1 mol of sucrose (C12H22O11)? |
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sodium to make the hazardous sodium oxide less harmless. The uses of the stoichiometry cffffffffffffffffffffffffffffffffffeeeeer bags are located inside automobiles. The air bag is in front of the passenger seat inside the dashboard. Once the vehicle gets into a crash the air bag pops out. The air bags are filled nitrogen gas. Hazardous sodium metal is also produced with the nitrogen so the potassium nitrate adapts with the sodium to make the hazardous sodium oxide less harmless. The uses of the stoichiometry
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What are the consequences of cutting down trees? There are many consequences for the environment of cutting down trees. Known as deforestation it has huge effects on the environment. It one very big effect is the loss of biodiversity which is a direct effect of cutting down trees. There are many reasons of which humans act out deforestation. For example is so that we can set up cattle farms. Also grow crops of which can then be sold to people. Another reason is for urbanisation and for the building
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the group. Reactivity with oxygen Magnesium metal + oxygen gas magnesium oxide Mg (s) + O2 (g) MgO (s) unbalanced 2Mg (s) + O2 (g) 2MgO (s) balanced Calcium metal + oxygen gas calcium oxide Ca (s) + O2 (g) CaO (s) unbalanced 2Ca (s) + O2 (g) 2CaO (s) balanced Barium metal + oxygen gas barium oxide Ba (s) + O2 (g) BaO (s) unbalanced 2Ba
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