3 References ------------------------------------------------- Preservatives in wood[edit source | editbeta] Preservatives may be added to wood to prevent the growth of fungi as well as to repel insects and termites. Typically arsenic‚ copper‚ chromium‚ borate‚ and petroleum based chemical compounds are used. For more information on wood preservatives‚ see timber treatment. ------------------------------------------------- Preservatives in foods[edit source | editbeta] Preservatives are often
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Chemistry I Chapter 8 Review Problems Part I Using the factor label method‚ neatly and clearly show all work. Answers are to include the unit‚ be in correct number of significant figures. If the answers are less than 1.0 or greater than 10‚ they are to be written in and be in correct scientific notation. Box your final answer. Mass/Mole Problems 1. Determine the molar masses of the following compounds: a. dinitrogen pentoxide c. sodium carbonate b. ammonium
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Everyday we throw out the trash we never really stop to contemplate where it all ends up like a landfill‚ a ship‚ or even the bottom of the ocean. On September 5th 1986‚ the Khian Sea was well on it’s way for becoming the World’s Most Unwanted Garbage. The ship had so many toxins‚ infestations‚ and many other unpleasants contents that no one would accept it. It must be horrifying and nauseating to even catch a glimpse of what was on the ship also to know they dumped it somewhere not worrying about
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smell of tulips in the spring. She gives her opinion of the city‚ she says that city is like all organized‚ like all the people in little squares. Then she continues describing the smell of the city‚ she mention the smell of work‚ glue factory smell‚ chromium-plated offices. And then the normal day in the city ends with ‘’smell of subways crowded at rush hours’’‚ like she take the subway and she returns home. In the second stanza the poet start mentioning a phrase‚ ‘’Where
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motivation. Cocoa is also one of the best food sources of magnesium‚ a mineral that balances the brain chemistry and helps build strong bones. It also contains many other minerals such as sulfur‚ potassium‚ calcium‚ iron (the greatest plant source)‚ chromium‚ zinc‚ manganese‚ copper and sodium. Cognitive stimulant - In addition to the anti-aging and antidepressant effects‚ cocoa’s more than 300 chemicals help to keep the brain sharp and healthy. The phenylethylamine‚ known as the "chocolate amphetamine"
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GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key GRADE 11 CHEMISTRY (30S) Final Practice Examination Answer Key IInstructions The final examination will be weighted as follows Modules 1–3 Modules 4–6 The format of the examination will be as follows: Part A: Fill-in-the-Blanks Part B: Multiple Choice Part C: Short Answer Total Marks Include units with all answers as required. Useful Information You will need the following in order to complete this examination: n n n n 15–20% 80–85%
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API RP 571 Test 1. is a change in the microstructure of certain carbon steels and 0.5 Mo steels after long term operation in the 800º F to 1100º F range. A. Graphitization B. Softening C. Temper Embrittlement D. Creep 2. What structure is 304 stainless steel? A. Martensitic B. Austenitic C. Duplex D. Ferritic 3. is the result of cyclic stress caused by variations
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of the most recent and controversial regulations passed by the current administration is the Mercury and Air Toxics Standards (MATS) signed on December 16‚ 2011. “MATS will reduce emissions of heavy metals‚ including mercury (Hg)‚ arsenic (As)‚ chromium (Cr)‚ and nickel (Ni); and acid gases‚ including hydrochloric acid (HCl) and hydrofluoric acid (HF). These toxic air pollutants‚ also known as hazardous air pollutants or air toxics‚ are known or suspected of causing cancer and other serious health
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carbohydrates would be candies‚ ice cream‚ fruit juice‚ soda‚ chocolate bars etc. Lastly‚ vitamins are connected to minerals. Minerals are also a very important part of a healthy person. There are 11 major groups of minerals. They are: calcium‚ chromium‚ copper‚ iodine‚ iron‚ magnesium‚
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EMPIRICAL FORMULA WORKSHEET 1. What is the empirical formula for a compound which contains 0.0134 g of iron‚ 0.00769 g of sulfur and 0.0115 g of oxygen? (FeSO3) 2. Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine. (CrCl3) 3. NAME the compound which contains 0.463 g Tl (#81)‚ 0.0544 g of carbon‚ 0.00685 g of hydrogen and 0.0725 g of oxygen by finding its empirical formula. (TlC2H3O2) 4. What is the empirical
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