Cl־ (aq) Nitric: HNO3 (l) + H2O (l) H3O+ (aq) + NO3- Sulfuric: H2SO4 (l) + 2H2O (l) 2H3O+ (aq) + SO42־ Ethanoic: CH3COOH (s) + H2O (l) H3O+ (aq) + CH3COO־ (aq) Sources of sulfur and nitrogen oxides in the atmosphere: Sulfur Oxides: Organic decomposition: 2H2S (g) + 3O2 (g) 2SO2 (g) + 2H2O (l) Burning high-sulfur coals: S (s) + O2 (g) SO2 (g) Smelting metal sulfides: 2PbS (s) + 3O2 (g) 2PbO (s) + 2SO2 Nitrogen Oxides: Lightning: N2 (g) + O2 (g) 2NO (g) Oxidation of nitrogen monoxide:
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natural or man-made. Pollutants can be classified as either primary or secondary. Usually‚ primary pollutants are substances directly emitted from a process‚ such as ash from a volcanic eruption‚ the carbon monoxide gas from a motor vehicle exhaust or sulfur dioxide released from factories. Secondary pollutants are not emitted directly. Rather‚ they form in the air when primary pollutants react or interact. An important example of a secondary pollutant is ground level ozone — one of the many secondary
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showing a reaction. In order to respect the law of conservation of mass which states that mass is neither created nor destroyed. In order to observe this law equations must be balanced using coefficients. For example the reaction of Sulfur and Oxygen yields Sulfur Dioxide. Shown quantitatively as [pic]. Materials and Procedure In Part 1 of the lab the tongs were used to heat a strip of copper foil in the Bunsen burner. The copper was allowed time to cool and the spatula was used to scrape
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they may be natural or man-made.[2] Pollutants can be classified as primary or secondary. Usually‚ primary pollutants are directly emitted from a process‚ such as ash from a volcanic eruption‚ the carbon monoxide gas from a motor vehicle exhaust or sulfur dioxide released from factories. Secondary pollutants are not emitted directly. Rather‚ they form in the air when primary pollutants react or interact. An important example of a secondary pollutant is ground level ozone — one of the many secondary
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survival in his quest along the Yukon travel‚ the man’s pride and egotism causes him to ignore the warning signs‚ which soon brings severe consequences to his short-lived journey. In‚ “To Build a Fire”‚ London describes how the old timer from Sulfur Creek warns the man about how cold it gets in the country. The man’s response clearly demonstrates his arrogance by laughing at the old timer. The old timer is giving the man a significant warning sign about the cold‚ but the man’s pride gets
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1. Introduction The Jominy end-quench test is a technique that has the ability to harden the steel by quenching. It is an essential feature of materials that determine the material’s selection for particular applications. The different types of steels and alloys that are used for hardening in an industry are done by this test and considering that this test is a standardised experiment [1]. 1.1 Aim The specimens that are used in this test are normalized in accordance with the standards. The purpose
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O 29. 30. 31. 32. 33. 34. 35. 36. 37. b. Group 1A; 1 valence electron c. Group 5A; 5 valence electrons d. Group 2A; 2 valence electrons e. Group 7A; 7 valence electrons f. Group 4A; 4 valence electrons a. Cl b. S c. Al d. Li by gaining or losing electrons a. 2 b. 3 c. 1 d. 2 a. Al3+ b. Li+ c. Ba2+ d. K+ e. Ca2+ c. Sr2+ Most nonmetals gain 1‚ 2‚ or 3 electrons to achieve a noble-gas electron configuration. a. 3 b. 2 c. 1 d. 3 a. S2– b. Na+ c. F– d. P3– a
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9g-11.7g = 3.2g (mass of hydrate) ; 14.9g-14.53g = .37g (mass of anhydrous) Percentage of water: .373.2 x 100= 11.56% HW: #1-3: On loose leaf‚ determine the empirical formula 1) 32.4% sodium; 22.5% sulfur; 45.1% oxygen ------------------------------------------------- 2) 25.3% copper; 12.9% sulfur; 25.7% oxygen; 36.1% water I. Chemical Formula a. Empirical formula i. the simplest ratio of the atoms present in a molecule or compound ii. lowest number of atoms in a
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In the mid-twentieth century the earth’s average temperature is increasing due to the fact that global warming is taking place. Global surface temperature has increased about a degree in the past century. The progressive gradual rise of the earth’s surface temperature thought to be caused by the greenhouse effect is responsible for changes in global climate patterns. An increase in the earth’s atmospheric and oceanic temperatures is widely predicted to occur due to an increase in the greenhouse
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irreplaceable structures forever. Many of these monuments have cultural and aesthetic value that is beyond price. Acid Rain 2. 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
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