The Effect of Temperature on The Viscosity of Glycerol Research Question: What is the effect of increasing the independent variable of the temperature of glycerol (30ºC‚ 40ºC‚ 50ºC‚ 60ºC and 70ºC) (+ 0.5ºC) using a hotplate and measured using a thermometer (+ 0.05º)‚ on the dependent variable of time (secs + 0.2) taken for 50mL (+ 0.05ml) of glycerol to flow through a 50cm3 burette (+ 0.05cm3) into a 250 mL beaker (+ 12.5 mL) measured by a digital stopwatch (+ 0.2secs)‚ therefore indicating the
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Mesothelioma‚ more precisely malignant mesothelioma‚ is a rare form of cancer that develops from the protective lining that covers many of the body’s internal organs‚ the mesothelium. It is usually caused by exposure to asbestos.[1] Its most common site is the pleura (outer lining of the lungs and internal chest wall)‚ but it may also occur in the peritoneum (the lining of the abdominal cavity)‚ the heart‚[2] the pericardium (a sac that surrounds the heart) or tunica vaginalis. Most people who
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4. determine percent yield (weight)‚ record UV/Visible spectrum (CHCL3) and determine lambda max. Step 2: Preparation of TPP Copper Complex 1. Place 10mL of N‚N-dimethylformamide (DMF) in a 25mL Erlenmeyer flask with boiling chips and heat on hotplate until slight boil. 2. Add 100 mg (0.16 mmol) TPP to the hot DMF‚ and dissolve 3. Add ~40 mg (0.20 mmol) of Copper (II) acetate‚ continue to heat at reflux for 5 min.
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Separation of the Components of a Mixture General Chemistry 1 (Chem 101)‚ ISP SCUHS Report 2 January 26‚ 2014 Abstract The analyses of mixture were to distinguish and identify homogeneous mixture by using the techniques of decantation and sublimation. By performing these techniques‚ we examined our solutions such as SiO2 (sand)‚ NH4Cl (ammonium chloride)‚ and NaCl (sodium chloride) and mixed H2O (water) with each solution after being heated. After examining our solutions‚ we made calculations
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while stirring 20 mL of 6.0 M NaOH was added to the flask. Hydroxide ion binds to the copper (II). This is an example of metathesis as the cations and anions exchange partners. Reaction Three‚ Heating the copper hydroxide to a medium boil on the hotplate while occasionally stirring produces copper oxide. Heating allows for decomposition. It also allows the copper to oxidize. 50 mL of hot water was added three times and then decanted the supernatant solution. Reaction 4‚ Copper oxide is dissolved
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being born on the filthy city streets and are not being provided with the proper care. Kozol decided to visit the mother of the baby in a homeless shelter. He celebrated the holidays with families in the shelter where the food was cooked off of hotplates‚ because there were no ovens. He also said that the average child was only six years old. The living conditions in a homeless shelter are very unsanitary and when you are a child your immune system is not that strong and it is very unhealthy. Kozol
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Ana‚ Julia‚ Alison‚ Kevin Bio A 9/12/12 1. What percentage of the work did each group member do? (0-100%-must total 100%) ○ ○ ○ ○ Ana- 25 % Alison- 25 % Kevin- 25 % Julia- 25 % 1. What effort did each group member put forth? (0-100%) ○ ○ ○ ○ Julia- 25 % Alison- 25 % Kevin- 25 % Ana- 25 % Feeding Frenzy Lab Introduction (5 points) Purpose (1 point) Question (1 point) Background (1 point) Hypothesis (1 point) Predicted Outcome (1 point) Methods and Materials (5 points)
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excess aluminum is reacted with a given mass of a copper salt (Copper Chloride dihydrate)‚ and the mole-to-mole ratio between the reactant and the product of a chemical reaction. Apparatus * 150ml beaker * Stirring rod * Ruler * Hotplate * Tweezers * 50ml graduated cylinder Materials * Copper (II) chloride dehydrate * Aluminum foil Procedure 1) Determine the mass of a clean 150ml beaker. 2) Add 2g of copper (II) chloride dehydrate 3) Add
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calculate the number of moles of an unknown mass from its mass and molecular mass To know how to dilute a solution and the effect of dilution on the solution’s absorbance Materials: Copper Sulfate Coloured solution – Potassium Manganate (KMnO4) Hotplate Method: Part A: The Formula of Hydrated Copper (II) Sulfate Firstly‚ about 1.0 g of hydrated copper (II) sulfate was put in the weighing bottle and the colour was noted. The mass of capped weighing bottle and hydrated copper (II) sulfate in
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Specific Heat Lab Objective: Find the specific heat of the unknown metal given using calorimetry. Background Theory: In every reaction‚ energy is transferred between a system and its environment. A system encompasses the substances that are involved in a reaction‚ and everything else in the universe other than the system is called the environment. The standard SI unit of energy is Joules (J). Temperature is the level of excitement of the atoms in a substance. In most cases‚ energy is
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