Which of the following ketones will give a positive iodoform test? A) 2-methyl-3-pentanone B) 3-hexanone C) 4-heptanone D) 2-hexanone E) cyclohexanone 7) 1 8) Which of the following reagents will quantitatively convert an enolizable ketone to its enolate salt? A) lithium diisopropylamide B) lithium hydroxide C) methyllithium D) pyridine E) diethylamine 8) 9) The α-halogenation of cyclohexanone: A) is slowed by the presence of acid. B) is catalyzed by base. C) requires one equivalent of base. D) is catalyzed by the sodium halide salt
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readily operational‚ must be charged * low internal resistance * Materials used: * nickel-metal-hydride (NiMH) * high specific energy * fewer toxic metals than (NiCd) * used in medical instruments * lithium-manganese (LiMN2O4) * high charge & discharge current * low specific energy * short-medium length service life * used in power tools Batteries are divided into two categories: PRIMARY BATTERIES *
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Activity Series for metals is developed by experiment. * Each element on the list replaces from a compound any of the elements below it. The larger the interval between elements‚ the more vigorous the reaction. * The first five elements (lithium - sodium) are known as very active metals and they react with cold water to produce the hydroxide and hydrogen gas. * The next four metals (magnesium - chromium) are considered active metals and they will react with very hot water or steam to
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Bower‚ B "Bipolar Math Subtractions." Science News 163.2 (2003): 20-21. Evanston Northwestern Healthcare. Health Articles: Bipolar Disorder. 1 Oct. 2003. 2 Oct. 2003 . Fireman‚ Bruce et al. "Suicide Risk in Bipolar Disorder During Treatment with Lithium and Divalproex." Journal of the American Medical Association 290.11 (2003): 1467-1473. Gale Encyclopedia of Medicine. Bipolar Disorder. 3 Nov. 2003. 4 Nov. 2003 . Gasparis‚ Milton. S. Personal interview. 17 Oct. 2003. Harakas‚ Margo. "Bipolar Disorder
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evidence might present in the collection of evidence? At the second area of the game the evidence that was found there was shoes print but this time two different shoes print‚ gold ore‚ wheel track and alkyl lithium what help me to find out the next location was in the shoe prints there was alkyl lithium‚ which not be in the desert. 4. Did you solve the crime? Who was your choice? Yes I solve the crime it was the park ranger butch and he was my first suspect as soon as I started the game. . 1. Please
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Essay ON PAcemaker A pacemaker (or artificial pacemaker‚ is a medical device that uses electrical impulses‚ delivered by electrodes contacting the heart muscles‚ to regulate the beating of the heart. The primary purpose of a pacemaker is to maintain an adequateheart rate‚ either because the heart’s native pacemaker is not fast enough‚ or there is a block in the heart’s electrical conduction system. Modern pacemakers are externally programmable and allow the cardiologist to select the optimum pacing
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arrangements to the following elements: Carbon‚ Fluorine‚ magnesium‚ sulfur 2) Write the electron arrangements of the following elements using the format shown above: lithium‚ sodium‚ potassium‚ beryllium‚ magnesium‚ calcium lithium:2‚1 sodium:2‚8‚1 potassium:2‚8‚8‚1 beryllium:2‚2 magnesium: 2‚8‚2 calcium: 2‚8‚8‚2 The periodic table 1) Draw a table showing which of the following elements are from the S block
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Higher Chemistry Mole Calculations Moles and Number 1 mole of any substance contains the same number of atoms/molecules/ions as there are atoms in a 12g sample of carbon -12 12g of carbon-12 contains a constant number of atoms. This number is known as the Avogadro constant (L) and is equal to 6.02 x 1023. 1 mole of carbon-12 contains 6.02 x 1023 atoms. Therefore‚ 1 mole of any substance contains 6.02 x 1023 atoms/molecules/ions. For example‚ 1 mole of aluminium contains
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HKDSE CHEMISTRY – A Modern View (Chemistry) Coursebook 3 Suggested answers |Chapter 25 Simple molecular substances with non-octet |Page Number | |structures and shapes of simple molecules | | |Class Practice |1 | |Chapter Exercise
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good. The rechargeable versions of the AA and AAA batteries are made from nickel-metal hydride. While the rechargeable batteries may cost more upfront‚ in the long run they can save you money. Rechargeable Batteries * Nickel-metal hydride and lithium batteries carry the largest amounts of energy and are usually rechargeable batteries used for laptops‚ cameras and cell phones. Not only can this type of battery be plugged in and recharged‚ but it also can hold a charge for longer than "throw-away"
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