cacophony. 9. Which word is spelled incorrectly? A. Incidentally B. Pronunciation C. Separate D. Occurence 10. A procession of persons on horseback is a A. cavalry. B. chivalry. C. cavalcade. D. cavalier. 11. Another word for a verbal bromide is a A. conceit. B. cliché. C. euphemism. D. seltzer. 12. Which word is spelled correctly? A. Privilege B. Supprise C. Judgemant D. Suddeness 13. To give a hint about something is the same as to A. vacillate. B. imitate. C. intimate.
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William son Eth er Synth esis Introduction In this reaction‚ an alcohol is deprotonated to form a good nucleophile‚ which then attacks the electrophile methyl iodide to form an ether. Tetrabutylammonium bromide‚ a phase transfer catalyst‚ is used to carry ions back and forth between the organic phase and the aqueous phase. OH O NaOH + NaI + H2O CH3I Before coming to lab‚ please review the following techniques: "Reluxing a reaction‚" "Extraction and washing‚" "Drying an Organic Solvent‚" "Evaporating
Free Chromatography Thin layer chromatography Distillation
water. Then filtrated to get the BaSO4. Evaporate the solution and you get back BaCl2. 4. Just add water. The potassium bromide will go into solution‚ the naphthalene will not. Filter off the naphthalene. Allow the water in the potassium solution to evaporate‚ and you have now separated the naphthalene and the potassim bromide. Or simply put both into an evaporating dish and heat strongly until allof the naphthalene has sublimed. What remains in
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soluble in water‚ therefore we can say that they are polar substances. Besides‚ I observed that biphenyl‚ butyl acetate‚ glycerol and motor oil are nonpolar substance. These compounds were soluble in hexane. Meanwhile‚ magnesium oxide and sodium bromide did not dissolved in either water nor in hexane. Moreover‚ Iodine and aspirin acted different than what I expected. Iodine is a nonpolar substance but not dissolved in hexane. On the other hand‚ I noticed that aspirin is a nonpolar substance but it
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HARVESTING THE OCEAN BY: SHUN ITCHIGAWA AQUACULTURE • the use of agricultural techniques to breed and raise marine organisms. • is the farming of freshwater or marine organisms. -MONOCULTURE -POLYCULTURE what is the important of aquaculture? It supply commercial species to the world’s markets. Common Aquaculture in the World • Fish aquaculture- raising fish commercially in tanks‚ ponds‚ or ocean enclosures. - carp‚ salmon‚ tilapia and catfish. • Raft culture- aquaculture using floating rafts
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cyanide solution with the alkyl halide 1-bromooctane does not ordinarily take place because 1-bromooctane does not readily dissolve in the aqueous solution. By the addition of small amounts of a phosphonium salt such as hexadecyltributylphosphonium bromide‚ cyanide ions can be ferried from the water phase into an organic phase (e.g.‚ bromooctane + some hydrocarbon). With the phase transfer catalyst‚ nonanenitrile (1-cyanooctane) forms quantitatively in 90 minutes at reflux.[1] C8H17Br(org) + NaCN(aq)
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we had concluded that there were two organic compounds and one inorganic among the unknowns. In order to have a strong background about the solubility test‚ we first classify organic compounds of known functional group using the said test. Butyl bromide‚ ethanol sucrose‚ butyraldehyde‚ ethanoic acid‚ methyl amine‚ nitrophenol‚ diethyl ether‚ benzoic acid and propanone were used. It is found out that they are class X‚ Sn‚ S‚ N‚ Sa‚ Sb‚ S‚ N‚ A1 and Sn‚ respectively. We use water‚ ether‚ HCl‚ NaOH
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Redox Problem Set 1: Reactions and Stoichiometry (All of these questions are no calculator friendly) 1) Give the oxidation number of carbon in each of the following: a) b) c) d) CF2Cl2 Na2C2O4 HCO3-1 C2H6 2) Give the oxidation number of sulphur in each of the following: a) b) c) d) SOCl2 H2S2 H2SO3 Na2S 3) Identify the oxidizing and reducing agents in each of the following: a) b) c) d) 8H+(aq) + 6Cl-1(aq) + Sn(s) + 4NO3-1(aq) SnCl6 -2(aq) + 4NO2(g) + 4H2O(l) 2MnO4-1(aq) + 10Cl-1(aq) + 16H+(aq)
Free Oxidizing agent Hydrogen Electrochemistry
1. Hydrogen Name: Hydrogen Atomic number: 1 Atomic Weight: 1.00794 grams/mole Standard state: gas at 198 K Hydrogen is the lightest Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up above 90% of Universe by weight. Hydrogen as water (H2O) is absolutely essential to life and it is present in all organic compounds. Hydrogen is lightest gas. Hydrogen gas was used in lighter-than-air balloons for transport but is far too dangerous because
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percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)? 1) 20% calcium and 80% bromine 2) 25% calcium and 75% bromine 3) 30% calcium and 70% bromine 4) 35% calcium and 65% bromine What is the empirical formula for C3H6? 1) CH 2) CH2 3) CH3 4) CH6 Which represents both an empirical and a molecular formula? 1) P2O5 2) N2O4 3) C3H6 4) C6H12O6 The number of atoms in 2
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