• Any compound that is formed from fused benzene rings is aromatic Aromatic Heterocyclic Compounds • Heterocyclic compounds are cyclic compounds with one or more atoms of elements other than carbon within the ring structure‚ such as sulfur‚ oxygen or nitrogen. • Pyridine o It is an aromatic 6-membered ring with 3 double bonds and one of the atoms is
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Pollution Step 1: Understand Where Air Pollution Comes From According to the federal Environmental Protection Agency (EPA)‚ there are six major causes of air pollution in the United States. These are ground-level ozone‚ particulate matter‚ lead‚ sulfur dioxide‚ nitrogen oxides and carbon monoxide. While most people have heard of carbon monoxide‚ lead and particulate matter‚ they might be surprised to learn that the primary source of air pollution today is ground-level ozone. Unlike the natural
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NON RENEWABLE RESOURCES [pic] A non-renewable resource is a natural resource which cannot be produced‚ re-grown‚ regenerated‚ or reused on a scale which can sustain its consumption rate. These resources often exist in a fixed amount‚ or are consumed much faster than nature can recreate them. Fossil fuel (such as coal‚ petroleum and natural gas) and nuclear power are examples. In contrast‚ resources such as timber (when harvested sustainably) or metals (which can be recycled) are considered renewable
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|iron(III) nitride | ____ 23. Name the compound Al2S3. |a. |aluminum sulfate |c. |aluminum(II) sulfate | |b. |aluminum sulfur |d. |aluminum sulfide | ____ 24. What is the oxidation number of hydrogen in H2O? |a. |0 |c.
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in space. Scientists believe that earth was hit by an asteroid that was over six miles wide‚ or that earth was hit by a comet travelling 18 miles per second. They contemplate that when the asteroid hit earth’s surface‚ a great amount of debris and sulfur rose into the air. They believe that this blocked the suns light from hitting the earth. In result‚ all the dinosaurs and 70 percent of all animals and plants died (“What Killed the Dinosaurs"). Scientists have backed up their theory that earth
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This is evident as sodium‚ magnesium and aluminium‚ the first three elements in period 3‚ are all classified as metals. We observed that they display highly metallic characteristics‚ as they are all solid‚ malleable and lustrous. On the other hand sulfur‚ which is further along the period in group 16‚ is too a solid although it is quite brittle and in powdered form. It is a dull‚ pale yellow and does not possess the shiny lustrous exterior that one would expect from a metallic element. It is regarded
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black rock? Think of it as a mass of atoms. Restate to remove the reader. Most of the atoms are carbon. A few are hydrogen. And 8there are some others‚ like sulfur and nitrogen‚ mixed in 8 ends in a preposition 1 cite. Chemists can take this mass of atoms‚ break. It apart‚ and make new substances‚ like gas! Isn’t gas just a different state? Sulfur that comes out of the coal construction helps the earth. How? Nuclear energy doesn’t 9 provide anything. Back in the day of maybe 1820 8 be specific people
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Describe the difference between a mixture and a compound. A compound is a substance in which atoms of different elements are chemically held to one another. A mixture is a substance made by combining two or more different materials in such a way that no chemical reaction occurs. A mixture can usually be separated back into its original components‚ a compound cannot. Below are some examples of the differences between each. Compounds •Compounds are pure substances. •They are made up of two or more
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This paper describes the origins of biomolecules hypothesis. Each different hypothesis is derived from a different scientist. It explains their claim and answers the question if the origin of biomolecules using their hypothesis. All the scientists provided evidence to help support their hypothesis. Some of the scientists had experiments to test their hypothesis. They also gave reasoning for supporting their theory. The Primordial Soup Hypothesis was introduced by the Soviet biologist Alexander
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engine Recirculation of exhaust gases at lower temperatures Catalytic converter Sulfur oxides (Sulfur dioxide‚ sulfur trioxide) Oxidation of H2S Reduction of sulfates Volcanoes Sea spray Biological decay Coal-burning Roasting of metal sulfides S + O2 SO2 Lung irritant Forms sulfuric acid aerosols Problems caused by acid deposition Removal of sulfur from fuel using K2CO3 (H2S + CO32- HS + HCO3-) Use coal with low-sulfur content Use alternative energy sources Fluidized bed combustion Alkaline scrubbing
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