Table Lab Look up all the halogens‚ give their name and formula. Describe what each one looks like under normal conditions. Halogens contain salts and they are: 1. Flourine F Normal Conditions- Gas 2. Chlorine Cl Normal Conditions- Gas 3. Bromine Br Normal Conditions- Liquid 4. Iodine I Normal Conditions- Solid 5. Astatine At Normal Conditions- Solid Give the names and formulas of three compounds that contain one element from the Noble Gas family. 1. Helium He 2. Neon Ne 3. Argon
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4-tert-butyl-2-ethyl-1-methylcyclohexane (ignore mirror images) in their most stable conformations. Arrange the structures from the least stable to the most stable. 6. Cyclohexylmethanol and 1-methylcyclohexanol are converted to their corresponding bromides. Write a suitable mechanism for each reaction‚ and assign each the appropriate symbol (SN1 or SN2). OH O H H Br H + :Br : SN2 :Br : O H H Br + H2O OH O H Br O + H2O + :Br : SN1 :Br
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assembled (as shown in Figure 1 below from the lab manual) consisting of a 3.0 mL conical vial charged with p-cresol (80uL from Eppendorf pipette)‚ 25% aqueous NaOH (130uL)‚ and a spin vane. The solution was mixed thoroughly and tetrabutylammonium bromide (9mg) was added along with n-propyl iodide (75uL) and it was equipped with a flask with a water reflux condenser. The solution was heated (95-100°C) while vigorously stirring it. After 60 minutes‚ the solution was allowed to cool to room temperature
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HSC Chemistry Topic 1 PRODUCT ON of MATERIALS What is this topic about? To keep it as simple as possible‚ (K.I.S.S.) this topic involves the study of: 1. POLYMERS FROM PETROCHEMICALS & BIOMASS 2. ALTERNATIVE FUELS - ETHANOL & THE ALKANOLS 3. REDOX CHEMISTRY & BATTERIES 4. RADIOACTIVITY & ITS USES ...all in the context of society’s use of energy and materials but first) an introduction ... In the previous topic in the Preliminary Course‚ you learnt about carbon chemistry of petroleum Then you
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LESSON PLAN FOR III-PEARL (CHEMISTRY) FORMULA WRITING AND NAMING OF COMPOUNDS OBJECTIVES: (1) Classify ions according to their composition‚ charge‚ and oxidation number (2) Define chemical formula (3) Explain the importance of representing ions‚ elements and compounds using chemical formulas (4) Write and name chemical formulas of compounds using the Stock System and Classical System MATERIALS: power point presentation videos flashcards textbook
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During the initiation and formation of the Grignard crushed magnesium was placed in a round bottomed flask with an iodine crystal with a bromobenzene solution with a stir bar. Once the stirring began‚ the solution turned brown and over time began to lighten up. The color change to brown indicated that the reaction began and this is why an iodine crystal was placed in the solution. The reaction started to boil due to its own reflux so heat didn’t need to be applied. Next the anhydrous ether solution
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www.igcse.at.ua ORGANIC CHEMISTRY OIL and its many useful PRODUCTS The origin of oil Crude oil is formed from organic material of the remains of plant and animal organisms that lived millions of years ago. These remains form sediments eg at the bottom of seas‚ and become buried under layers of sedimentary rock. They decay‚ without air (oxygen)‚ under the action of heat and pressure to form crude oil over millions of years. It is a fossil fuel because it is formed from
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____ 2. 2s22p6 B. Which has the lowest first ionization energy? ____ 3. D = 2s22p5 C. Which is a noble gas? 10. Convert 4.3 kilograms to centigrams using dimensional analysis. 11. Consider the elements neon‚ bromine‚ and phosphorus. Which has five electrons in its 4p sublevel? 12. Write the formula obtained when this atoms loses or gains valence electrons and becomes an ion. Tell whether it is a cation or an anion. Be 13
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Who discovered the element? Selenium was discovered by Jons Jacob Berzelius in 1817. How was the element discovered? Selenium was discovered by Jons Jakob Berzelius in 1817. In 1817‚ he was studying the chemicals used in making sulfuric acid‚ but they got selenium from a red-brown sediment which collected at the bottom of the chambers in the particular plant. At first he thought it was the element tellurium and tellurium is a rare element‚ so he brought it back to his laboratory. After studying
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CHEM3412 Synthesis of a Porphyrin Porphyrins are hetereonuclear‚ macrocyclic compounds that play an important role in living organisms. Examples include the non-protein heme portion of hemoglobin in animals whereby the lone pairs on nitrogen can bind to the oxygen-carrying iron. In plants‚ chlorophyll uses the vast conjugation to allow absorption of light for photosynthesis. The characteristic colors of porphyrins is also due to the conjugation. An examination of the porphyrin structure
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