BACK TITRATION AIM - To estimate volumetrically the amount of calcium carbonate present in the eggshell and analyzing the sources of errors to evaluate the result. Part A: Standardization of 2M NaOH(aq) Data Collection : Weight of substances Uncertainty Weight of watch glass + salt (potassium hydrogen phthalate) w1= 23.4380g ± 0.001g Weight of watch glass ( after emptying the salt)w2 = 21.5430g ± 0.001g Weight of salt (potassium hydrogen phthalate) w1 –w2= (23.4380± 0.001g) – (21
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Chapter 3 PERIODIC TABLE AND PERIODICITY OF PROPERTIES Q.1 What are the contributions of Dobereiner‚ Newland‚ Luthar Meyer and Mendeleef in the present shape of long form periodic table ? Dobereiner’s Triads : In 1829‚ a German scientist‚ John Dobereiner classified specific elements into groups in order of increasing atomic masses. Each group has three elements. He named these groups as triads.He noticed that the atomic mass of the middle elements was found to be approximately equal to the
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the conch shell. These boys are just children‚ but they know the difference between rules and civilization rather than savagery and chaos. The conch shell provided order to the group of boys. It brings a sense of power. The conch shell controlled all the meetings the boys had. At those meetings‚ who ever is holding the shell had the right to speak and express their thoughts and feelings. No one can interrupt or speak until it is their turn to hold the conch. Without the conch shell‚ chaos would
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Dalandanan‚ Valenzuela City The Use of Coconut Shells (Cocos Nucifera mesocarp) As Green Activated Carbon Fiber For Muffler Air Filter Group Members: De Leon‚ Glenn Patrick C. Enmil Jr.‚ Rolando Manuel P. Santos-Diaz‚ Zoe Marie C. Suyat‚ Pauline Jirah A. Submitted to: Mr. Albert Tolentino Date Submitted: Aug. 10‚ 2011 Chapter 1: Introduction Statement of the Problem A. General problem: 1. How could we use coconut shells to come up to an activated carbon fiber?
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CHAPTER 7 Q1) What does the shell ordinarily do while a command is executing? What should you do if you do not want to wait for a command to finish before running another command? A1) The shell goes to “sleep” until the command has been processed. You can run a program in the background‚ which will allow you to run more than one at a time. Q3) What is a PID number? Why are these numbers useful when you run process in the background? Which utility displays the PID numbers of the commands
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Running back Rushel Shell‚ who said in April he was transferring from Pittsburgh to UCLA‚ has contacted the Panthers’ coaching staff about his intention of returning to the team‚ a source said. Charles LeClaire/USA TODAY SportsRushel Shell‚ who had the second-most rushing yards on Pitt as a true freshman‚ has changed his mind and will not transfer with hopes of returning to the Panthers‚ a source said. Shell never enrolled at UCLA‚ a source said‚ which could make his return to Pitt less complicated
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Abstract: The chemical and physical conditions used in the preparation of activated carbon‚ an adsorbent used in water filtration influence the specific surface area and the porosity. In this study‚ coconut shell was used as the raw material and activation reagents such as Hydrochloric acid‚ Zinc Chloride and Phosphoric Acid were used. A single burn and double burn process was carried out for each method. The activated carbon obtained was compared in terms of absorption capacity‚ bulk density‚ BET
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and neutrons have mass‚ whereas the mass of electrons is negligible. Protons and neutrons exist at the centre of the atom in the nucleus. Electrons move around the nucleus‚ and are arranged in shells at increasing distances from the nucleus. These shells represent different energy levels‚ the outermost shell being the highest energy level. The number of protons that an atom has in its nucleus is called the atomic number. The total number of protons and neutrons in the nucleus of an
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perform the actions requested by the computer’s users‚ an operating system must be able to communicate with those users. The portion of an operating system that handles this communication is often called the user interface. Older user interfaces‚ called shells‚ communicated with users through textual messages using a keyboard and monitor screen. More modern systems perform this task by means of a graphical user interface (GUI) in which objects to be manipulated‚ such as files and programs‚ are represented
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gun used a fixed configuration shell. Which means the projectile and powder charge were together in the same shell. This meant the loading and firing of the French 75mm could be done with one man instead of the normal 3 people required. This also cut down reload time and allowed for more rounds to be fired. Finally the shells were more stable and allowed more range. The third improvement of French 75mm was the barrel had rifling groves‚ which allowed the shells to travel further distance with
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