Technetium-99 Technetium-99 (Tc-99m) is used tens of millions of times annually. Approximately 85% of diagnostic procedures in nuclear medicine use this radioisotope. Making it the most common radioisotope used in diagnosis. Technetium-99 is used as a radioactive tracer and is detected in the body by gamma cameras. Technetium-99 is produced by bombarding Molybdenum with neutrons‚ producing Molybdenum-99. This then goes through a Beta decay with a half-life of 66 hours and produces Technetium. Technetium-99
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influence the rate of reactions in anSN1 reactions. The factors that we will be inspecting are the leaving groups‚ Cl- vs.Br. The structure of the alkyl group‚ tertiary versus secondary and the polarity of the solvent‚ 40 percent 2-propanol versus 60 percent 2-propanol. Introduction: The Substitution reactions involve an atom or atoms are replacing one another atom. Many of these reactions require a nucleophile. Nucleophiles have unshared pair of electrons. Weak bases are considered good living
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distilled and the collecting tubes was switched at the appropriate temperature. The volume‚ flammability‚ odour‚ density and boiling point of each fractions were recorded. After this experiment‚ we concluded that the liquids in the mixture were 2-propanol and water. Data/ Results: Heating Curve Data Time (s) Temperature (°c) 0 22.0 10 22.8 20 22.9
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Three test tubes were placed in a test-tube rack. A clean eye dropper was used for each alcohol and 4 drops of 1-butanol were placed in the first tube; 4 drops of 2-butanol were placed in the second tube; and in the third tube‚ 4 drops of 2-methyl-2-propanol were placed. After the 4 drops of each alcohol were placed in the test tubes‚ the next step was to add 10 drops of concentrated hydrochloric acid (HCl) to each of the three test tubes. The mixtures were shaken very gently and the tubes were left
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Date: 3/12/2012 Photochemistry: Photoreduction of benzophenone and rearrangement to benzpinacolone Abstract: In this experiment Benzpinacolone was synthesized in a process that contained two steps. First the photoreduction of benzophenone in 2-propanol‚ which was done by placing the flask under sunlightfor the absorption of the UV rays to carry out the reaction. Then the second part was the dehydration of benzpinacol to benzpinacolone‚ where the benzpinacol product was converted to a ketone by
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of solids – ionic and molecular solids. • To classify three unknown substances as ionic compounds‚ polar covalent compounds or non-polar covalent compounds. • To identify the three unknowns. Observations: A B C Solubility in: • H2O • 2-Propanol Soluble Insoluble Soluble Insoluble Insoluble Soluble Conductivity None High None Melting Point 100 – 525 ℃ > 525 ℃ < 100 ℃ Odour Subtle None Very Strong Concluding Questions: 1. Identify the type of solid in each unkown compound
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Molar Heat of Combustion Aim: To find the molar heat of combustion for four different alkanols: 1. Methanol 2. Ethanol 3. 1-Propanol 4. 1-Butanol - And to compare the experimental value with the theoretical. Background: The Molar Heat of Combustion of a substance is the heat liberated when 1 mole of the substance undergoes complete combustion with oxygen at standard atmospheric pressure‚ with the final products being carbon dioxide gas and liquid water. (Ref. “Conquering Chemistry‚ Roland
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Analysis In this experiment‚ the distillation of three groups of two miscible liquids was performed. First‚ Ethanol and 2-Propanol were distilled. The boiling points of ethanol and 2-propanol had a difference of 5°C. The percent recovery for both ethanol and 2-propanol were both 0%. The percent recovery of the intermediate was 96%. The percent efficiency calculated of ethanol and 2-propanol was 0% efficient. Next‚ Cyclohexane and Toluene were distilled. The boiling points of cyclohexane and toluene had
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acetate. Materials and Methods Apparatus 4 test tubes Test tube rack Graduated cylinder (10 mL) 150 mL beaker 250 mL beakers (2) Hot plate Thermometer Safety glasses Beaker tongs Test tube holder Reagents Methanol Methyl-2-propanol 1-pentanol 1-octanol Acetic acid Formic acid (methanoic acid) Salicylic acid Concentrated sulfuric acid (H2SO4) Procedure 1. We labeled the four test tubes A to D and placed them in the test tube rack. 2. Into the appropriate test tubes
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fuel for the right amount of time Measuring cylinder: I am using the measuring cylinder to measure the water making sure it is the right amount Wooden split: I am using this because it is a safe way of lighting the Bunsen burner Fuels: ethanol‚ propanol‚ butanol‚ paraffin I am using a range of fuels with different hydrocarbons because I want to see the energy of different fuels. Also this is what is available to me
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