an editable file which can be sent to an instructor. obseRvations The color of the flame is expected to be as follows: Metallic ion Flame color Sodium Na+ Yellow/Bright Orange Strontium Sr2+ Red Potassium K+ Light Purple Barium Ba2+ Green Copper Cu2+ Green Lithium Li+ Red Calcium Ca2+ Orange Unknown Red-Strontium Questions A. All chemical used in this test are binary compounds. What portion of the periodic table is responsible for the color observed
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by Oscar Wilde‚ the spirit of a prince and a little swallow find true happiness through doing good deeds. This is the central idea that Oscar Wilde is trying to get across: “Good deeds mark the path to true happiness.” This is stated mainly through 3 points‚ which are that the Swallow and Statue Go to heaven for their actions‚ the prince lived a life of pleasure but only felt true happiness when he helped his people out of poverty‚ and the Swallow and statue go to heaven for their actions and are named
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Cited: "Barium Sulfate (Blanc Fixe)." Solvay Sustainable. Solvay America Inc‚ 2014.Web.19 Feb 2014. <www.solvaynorthamerica.com/.../PDF/PS_BariumSulfateFinal.pdf>. Baur‚ Richard C.‚ et al. 2009‚ Investigation 7: How Can The Waste Be Made Useful?‚ Lab Inquiry in
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Faults of woven fabric: Bar: It is a band running across the full width of cloth. Pick bar due ti difference in pick spacing Tension-bar due to difference in weft tension Weft-bar due to difference in material count‚ twist etc Box marks: The causes of box marks are – Dirty box Shuttle riding over the weft Dirty shuttle Dirty picking and ticks Broken pattern: It occurs due to wrong drawing of threads insertion of thee pick‚ incorrect lifting of warp threads. Broken pick:
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Discussion Questions 1. Why do different metals have different characteristic flame test colours? The photons emitted during the test precisely match the quantum energy difference between the excited state and the ground state. For different elements the spacing between the ground state and the higher energy levels is different. So different elements have different flame test colours. 2. Most salts contain a metal and a non-metal. Look at the compounds we tested and determine whether it is
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The chemtrail conspiracy was brought up around 1990‚ when a lot of people claimed to see aircraft spraying strange patterns across the sky‚ which were later tested and came back positive for bacteria‚ aluminum‚ virus‚ barium‚ human blood and molds‚ which are very dangerous to the human body; these substances are also linked to respiratory and neurological diseases like Autism‚ Alzheimer’s disease‚ Asthma and allergies‚ so basically our health is being affected and a lot of people have come to the
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2 mL 1 Distilled water 1 Toothpicks 2 Beaker‚ 50 mL‚ plastic 1 Cylinder-25-mL 1 Pencil‚ marking 1 Test Tube (5)‚ 13 x 100 mm in Bubble Bag 1 Well-Plate-24 1 Ammonium Molybdate‚ 0.2 M - 2 mL in Pipet 1 Aqueous Ammonia‚ 6 M‚ NH4OH - 4 mL in Pipet 1 Barium Chloride‚ 0.3 M - 2 mL in Pipet 1 Hydrochloric Acid‚ 6 M - 8 mL in Dropper Bottle 1 Nitric Acid‚ 6 M - 2.5 mL in Pipet 1 Organic Reagent - 1.5 mL in Vial 2 Pipet‚ Empty Short Stem 1 Silver Nitrate‚ 0.1 N - 6 mL in White Dropper Bottle 1 Sodium
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company has multiple plants in United States and Brazil from where they export their product. Their subsidiary in Brazil also manufactures various inorganic chemicals‚ such as sodium sulfide‚ sodium sulfite‚ sodium metabisulfite‚ barium carbonate‚ barium sulfate and barium chloride. Church & Dwight consumer products can be broken into four categories: deodorizing and household cleaning‚ laundry‚ personal care and international. Over half of their domestic products are sold under the Arm & Hammer
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mililiters of KOH solution‚ prepared by dissolving 60.0 g of KOH in 100 mL of solution‚ are needed to prepare 450 mL of a 0.70 M solution (answer : 29.41 mL) 7. A student wishes to prepare 500 mL of 25 ppm solution of barium. Calculate: a) How many mililiters of 1000 ppm barium would be required if he/she were to prepare this by dilution? (answer : 12.5 mL) b) If he/she were to prepare this from pure solid BaCl2.2H2O‚ how many grams would be required? (answer : 22.4 mg) 8. Tell how you would
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mass of the middle element will roughly be the average of the atomic masses of the other two elements Other metals Non-metals Element Atomic mass Element Atomic mass Calcium 40 Chlorine 35.5 Strontium 88 Bromine 80 Barium 137 Iodine 127 Average mass of calcium and barium = = 88.5 Hence‚ Dobereiner was able to identify only three triads from the elements known at that time as shown Li Ca Cl Na Sr Br K Ba I Table 1: Dobereiner’s triads Limitations of Dobereiner’s classification of
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