practice proper heating and cooling techniques and to calculate the formula of a known anhydrous compound and to calculate the percent of water in an unknown hydrate from results. Materials and Methods: Materials used for this experiment included 3 crucibles (with lids)‚ clay triangle‚ ring‚ burner‚ CaSO4.2H2O and one unknown hydrate. In Part A‚ we assembled a Bunsen burner and heated 2 crucibles (and lids) for 5 minutes and then allowed them to cool to room temperature. Once cooled‚ we recorded
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mobile electrons to carry the current. Diamond is very hard as there are many bonds within the substance. It is the hardest natural substance and is often used in drilling. Graphite Structure: Arranged in layers of atoms. Each carbon atom is joined to 3 others‚ leaving one outer shell electron on each carbon is free to move and able to cary the current. Therefore‚ they are able to conduct electricity. Graphite also has a high melting point for the same reasons as diamond. However‚ it is not hard like
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Ice water 1 minute 8 C° 46.4 F° 281K Ice water 5 minutes 5 C° 41.0 F° 278K Object Estimated mass (g) Actual mass (g) Actual mass (Kg) Mechanical pencil 4g 5.55g .00555kg 3 pennies 9g 8.7g .0087 kg 1 quarter 6g-7g 5.75g .00575 kg 2 quarters‚ 3 dimes 13g 18.3g .0183 kg 4 dimes‚ 5 pennies 20g 18.45g .01845 kg 3 quarters‚ 1 dime‚ 5 pennies 28g 34.0g .034 kg Key 6g-7g 7.65g .00765 kg Key‚ 1quarter‚ 4 pennies 25g 24.55g .02455 kg Mass A Mass B Mass B-A Liquid Volume (ml)
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Case Study Exercise One Part One SWOT Analysis of adopting a new form of governance for Colorado Springs Utilities: Strengths (internal): • Politically insulates elected officials from unpopular‚ but necessary utility decisions • Reduces risk and legal liability to elected officials • Allows for greater subject matter expertise and focused attention on public utility issues by members of new utility board • Frees council members to focus their attention on other constituency issues • Allows for
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The Spring Festival is a traditional festival for all Chinese people; since 1983‚ Chinese families have sat down to wrap dumplings and watch CCTV’s New Year’s Gala on television on Chinese New Year’s Eve. It’s a Chinese New Year’s Eve tradition that nearly every family in China participates in to ring in the New Year. It brings so much happiness to Chinese all around the world in the past twenty years. WHEN: For every year since then at the turn of the Lunar New Year‚ the program begins at 8:00PM
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techniques learned. 3. Determine the mass percentages of each of the three components present in a mixture. The 5 separation techniques are…… 1) Sublimation: involves the heating of a solid that passes directly from the solid phase into the gaseous phase. The reverse process where a gas goes into the solid phase is called deposition or condensation. 2) Extraction: involves using a solvent that selectively dissolve one or more components from a solid mixture. 3) Decantation: involves
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Drama Essay: A Review of “Spring Awakening” I will be reviewing the play titled‚ “Spring Awakening” by Fred Wedekind. This play was produced by The Department of Performing Arts and Humanities of the School of Liberal Arts at and directed by Robert W. Oppel. I saw the play on March 20th Q Building Theatre. The play was excellent and exceeded all expectations due to the professional way the story was presented. “Spring Awakening” is a musical concerning teenagers who explore their individual
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Chemical reaction involved: CH3COOH(aq) + NaOH(aq)→ NaCH3COO(aq) + H2O(l) Apparatus: An electronic balance‚ a 10.0cm3 pipette‚ a 25.0cm3 pipette‚ a pipette filler‚ a 250.0cm3 volumetric flask‚ a burette‚ stand and clamp‚ a conical flask‚ a white tile‚ 3 large beakers‚ a small beaker‚ a dropper‚ a boiling tube‚ a rinsing bottle Chemicals: 0.1M NaOH(aq)‚phenolphthalein indicator‚ commercial vinegar (5% acidity)‚ distilled water Procedures: Part1: The density of the commercial vinegar was found
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EXPERIMENT 5- A FISCHER ESTERIFICATION SYNTHESIS OF PEAR OIL One of the major uses of Esterification (C(=O)-C-R) is forming compounds with different odors which can be used to make different synthetic and natural flavorings. Using the chemical and physical properties of organic compounds‚ an ester was catalyzed from the reaction of a carboxylic acid with an alcohol‚ producing an odor similar to that of pear oil. The mechanism of this Fischer- Esterification process is outlined as follows:
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Although winter and spring break are similar in some aspects‚ the routine for each is fairly different. To start off‚ winter break happens during a festive time of year‚ with Christmas coming right around the corner. The trees are decorated with bright‚ colourful lights‚ carolers are singing joyous songs and the warmth of hot chocolate‚ tea‚ and coffee are right at your fingertips. On the other hand‚ spring break doesn’t have any special events that gets the entire nation excited. There aren’t any
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