Question 2.1: (i) Calculate the number of electrons which will together weigh one gram. (ii) Calculate the mass and charge of one mole of electrons. * ------------------------------------------------- Answer (i) Mass of one electron = 9.10939 × 10–31 kg Number of electrons that weigh 9.10939 × 10–31 kg = 1 Number of electrons that will weigh 1 g = (1 × 10–3 kg) = 0.1098 × 10–3 + 31 = 0.1098 × 1028 = 1.098 × 1027 (ii) Mass of one electron = 9.10939 × 10–31 kg Mass of one mole of
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are reactions that involve the leaving of an “-OH” or “-H” group resulting in the formation of a double bond between two carbons. For the experiment we used 2-Methylcyclohexanol as a beginning reagent to dehydrate and possibly form 3-methylcyclohexene‚ 1-methylcyclohexene‚ or methylenecyclohexane. Drierite® (Calcium Sulfate) was used as a drying agent to help break the alcohol and hydrogen groups from the carbons. Concentrated phosphoric acid was used as a catalyst to help move the reaction towards
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Pat 1 Synthesis of 4-aryl-6-indolylpyridine-2-carbonitriles and evaluation of their biological activity Synthesis of 6-indolyl-4-aryl-3-cyanopyridine-2-one (1a-e) Employing the MCRs approach and microwave irradiation‚ an equimolar amounts of aromatic aldehyde‚ 3-acetylindole‚ ethyl cyanoacetate were reacted with excess of ammonium acetate in one-pot‚ reaction‚ under the microwave irradiation‚ afforded a novel series of 4-aryl-6-indolyl-nicotinonitrile-2-one derivatives 1a-e. Ethylene glycol was
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13! (1 0.85)0 (0.85)130 (1 0.85)1 (0.85)131 0! (13 0)! 1! (13 1)! =0 . 1 2+ 0 09 . 2 7 7 =4 0.39= 839.83% Thus‚ the probability that the engineer incorrectly passes a day’s production as acceptable if only 85% of the day’s Blu-ray players actually conform to specification is 39.83%. (b) What is the probability that the engineer unnecessarily
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The final compound which I am going to look at is 4-aminobenzenecarboxylic acid. The compound is also known as 4-Aminobenzoic acid. The molecular and structural formula of the compound is C7H7NO2 which means that the compound consists of seven carbon atoms attached to seven hydrogen atoms along with one nitrogen atom and two carbon atoms attached as a carbon-oxygen double bond. The displayed formula for the 4-aminobenzenecarboxylic acid compound is shown and it shows the formula in a ring form therefore
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In order to first perform the reaction‚ 1.5 mL of 4-methylcyclohexanol was added to a pre-weighed 5mL conical vial. The conical vial was then weighed to find the actual mass of 4-methylcycloheaxanol. Then‚ 0.4mL of 85% phosphoric acid was added to the conical vial using a plastic pipet. Six drops of concentrated sulfuric acid was then added to the vial using a glass pipet. A spin vane was then added before adding the Hickman head‚ water condenser and a drying tube packed with calcium chloride to
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Assignment Week 4 Chapter 11 20. A parallel RL circuit has values of IL = 240 mA and IR = 180 mA. Calculate the magnitude and phase angle of the circuit current. It=√ IL^2 + IR^2= √ 240mA^2 + 180mA^2= 0.3 x 10^-3= 300mA θ= tan^-1(-IL/IR)= (-240mA/180mA)= -53° 300mA∟-53° 22. Calculate the total impedance for the circuit shown in Figure 11.38b. It= √IL^2 + IR^2= √800mA^2 + 120mA^2= 0.808949 x 10^-3= 808.95mA Zt= Vs/It= 120V/808.95mA = 148Ω θ= tan^-1(-IL/IR)= (-800mA/120mA)= -81.5= 82° 148∟82° 24
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4-4 Boiling Point Elevation If you dissolve a substance such as ordinary table salt (NaCl) in water‚ the boiling point of the water will increase relative to the boiling point of the pure water. In this assignment‚ you will dissolve a sample of NaCl in water and then measure the boiling point elevation for the solution. 1. Start Virtual ChemLab and select Boiling Point Elevation from the list of assignments. The lab will open in the Calorimetry laboratory with a calorimeter on the lab bench
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XXXXXXXXXXXX NETW410‚ Professor’s Name 10/6/12 Lab 4: Connecting Point A to Point B Lab Report How should an Internet connection be made for the current campus? Why did you select this option over the others? AT&T is the carrier providing service to the existing campus as well as the new campus. Examine the offerings for Internet access to select the one that should be used. (10 points) ST which is made by at&t is the most popular connector for multimode networks‚ like most buildings
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platform-specific nmap executable and pipes the output back. Zenmap uses Profiles which are basically nmap parameter presets to specify how scans are performed. 3. What step in the hacking attack process uses Zenmap GUI? System Hacking 4. What step in the hacking attack process identifies known vulnerabilities and exploits? Enumeration 5. During the scanning step of the hacking attack process‚ you identified known software vulnerabilities in a Windows XP Professional Workstation
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