Crystallization – Craig Tube For this experiment‚ we had to find the percent recovery and melting point of pure sulfanilamide from impure sulfanilamide using the crystallization technique. To start‚ .1004 grams of impure sulfanilamide was put into a Craig tube with enough ethyl alcohol to barely pass the top of the sulfanilamide. The Craig tube was put into a stone block until boil‚ then check to see if the solid material had dissolve. With the addition of two more drops from a supply of 2.7 mL of
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declared war on Germany. But Germany defeats Poland quickly and its troops enter Warsaw‚ where life for Jews deteriorates as the Nazi authorities prevent them from working or owning businesses and force them to wear blue Star of David armbands. Photograph of Władysław Szpilman By November 1940‚ Szpilman and his family have been forced from their home into the overcrowded Warsaw Ghetto where conditions only get worse. People starve‚ the guards are brutal and corpses are left in the streets. On
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tubing and bend the glass tube into a U-shape. The glass tube is then filled with a liquid‚ typically mercury‚ so that all trapped air is removed from the sealed end of the tube. The glass tube is then positioned with the curved region at the bottom. The mercury settles to the bottom After the mercury settles to the bottom of the manometer‚ a vacuum is produced in the sealed tube. The open tube is connected to the system whose pressure is being measured. In the sealed tube‚ there is no gas to exert
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motility? D. Why might it be difficult to observe motility in a wet mount? E. Why is it important to use a needle rather than an inoculating loop when inoculating a motility tube? F. For which of the organisms on the wet mount‚ if any‚ were you able to observe motility? G. For which of the organisms in the motility medium tubes‚ if any‚ were you able to observe motility? Questions A. Define the following terms: 1. Monotrichous 2. Amphitrichous 3. Lophotrichous 4. Peritrichous B. What are the
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parallel and counter flow arrangements 1.0 INTRODUCTION A heat exchanger is equipment in which heat exchange takes place between 2 fluids that enter and exit at different temperatures. The main function of heat exchanger is to either remove heat from a hot fluid or to add heat to the cold fluid. The direction of fluid motion inside the heat exchanger can normally categorised as parallel flow‚ counter flow and cross flow. For parallel flow‚ also known as co-current flow‚ both the hot and cold fluids
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her heart was beating regularly and she can breathe spontaneously. Sara was completely dependent on the PEG tube for feeding. The doctors responsible for Sara’s case decided that the life was with no value for Sara and the PEG tube should be withdrawn. Sara’s husband and her family reject this decision and they have approached the Sharia court to prevent doctor from withdrawing the PEG tube. The ethics of this case was turned on why the physician is recommending withdrawal‚ and why the husband (SDM)
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Fire tube boiler designing Fire tube boilers operate by sending combustion/flue gas by using a combination of straight tubes flanked by trouble held in identical vessel. Often identified by the variety of passes used (say for example a 3-pass or 4-pass fire tube boiler)‚ this refers to the variety of times combustion gas flows the capacity of the pressure vessel mainly because it transfers heat on the water. A wet-back fire tube boiler utilizes a water cooled publish zone (end closure). A dry-back
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Despite his claim to be limited in intelligence‚ he introduces the students to one of the greatest English authors‚ Charles Dickens. Dolores‚ Matilda’s overzealous Christian mother‚ expresses an extreme distrust of the teacher and his curriculum. She does everything in her power to ensure that her daughter’s mind is not polluted by the strange white man‚ including making weekly visits to the classroom. She even goes as far as stealing and hiding Watts’s Great Expectations book‚ an action that causes
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lungs that causes wheezing‚ coughing‚ and gasping for breath. It is a very unpredictable disease and can differ greatly from one person to the next. Some people have very mild symptoms every once and a while where as for others it is a daily struggle to breath. Asthma can occur at any age but most commonly begins with in the first five years of life. Approximately 7% of Americans suffer from asthma‚ which is roughly 18 million people‚ 4.8 million of which are children. Asthma is the leading cause
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How to Unblock Fallopian Tubes Overview Blocked fallopian tubes? Then you need to worry not‚ there is hope.40% of women with infertility get it from blocked fallopian tubes. Before reading on you should have had a hysterosalpingram test (HSG) with your doctor to confirm that the cause of your infertility is blocked fallopian tubes. Over the years women have had blocked fallopian tubes unblocked rekindling the joy of ever having children. All you need is following the given instructions to the later
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