Chemistry Final Exam Version 10/7/14 Name: Student number: Directions: It is important that you provide answers in your own words. Please focus only on information from the text/eBook to create your own solutions. Please do not use direct information from an outside source (especially copying and pasting from an “answer” website). Use of direct information from an outside source is against school policy. All answers will be checked for plagiarism. Instances of plagiarism can result in
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7.3 Flow Rate and Viscosity (pg 153) Q1. If the flow rate in a pipe is 2 L/s‚ what does that tell you about how fast the water is moving. A1. It tells me that the water is moving fast through the pipe at 2 litres per second. If there were 60 seconds you would have 120 litres. Q2. When you tip a bottle of syrup upside down‚ it takes a longtime for all the syrup to pour out. Explain this using the terms “viscosity‚” “cohesion‚” and “adhesion.” A2. Syrup takes a long time to empty
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density‚ extensive properties‚ and intensive properties. Where do the units for mass and volume) come from and what do they mean? What is the density of distilled water? What is Archimedes principle? Does temperature affect the density of a solid? Liquid? Gas? Materials: Safety glasses‚ 10‚ 25 or 50 mL graduated cylinders Distilled water Metal Samples W‚ X‚Y & Z Procedure: 1. Class split into 5 groups. Every group will get data for four metals and tell it to the class 2. Choose
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Introduction: The purpose of this experiment is to test if altering the pH of the milk will trigger a hydrophobic reaction. It will also give me a better understanding of the scientific method‚ hydrophobic reactions‚ and how pH affects substances. If the vinegar and salt are added to the heated milk‚ then the milk will curdle. I came to this conclusion based on common knowledge and the text introducing the experiment. I have not made cheese at home before‚ but I have made Hamburger Helper meals
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Raquel Johnson October 19‚ 2014 Solids: Recrystallization and Melting Points Organic Chemistry 2423 Lab Report: Recrystallization Abstract: The purpose of this lab was to purify an unknown compound by recrystallization. Taking an unknown compound and identifying it by purifying it from its impurities through the use of hot gravity filtration. Then to determine the unknown you were to take the melting point. An unknown compound was recrystallized from hot water to produce 0.99 grams (67% recovery)
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1977‚ Minnetonka release Soap Machine that is the first time to have liquid soap in the market and continuously launch Softsoap in 1980. Softsoap entered to the market as the first mover‚ gain a competitive advantage and become to the market leader. However‚ competitive advantage of Softsoap is not able to preserve the market share when it is attacked by big players in the market as P&G and Armour-Dial which are produce the liquid soap after. Red Bull Red Bull has a competitive advantage in term of
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conical vial and was mixed with 2ml of methanol then shaken and let to sit till the undissolved particles settled to the bottom and transferred the liquid into a centrifuge tube using a filter-tip pipet. Repeating the process with an additional 2mL of methanol. The solvent was then centrifuged for 3 minutes until the mixture had settled into a supernatant liquid layer and a solid layer. Then in a prepared alumina column with 0.5 mL g of alumina 2mL of methanol was added to column and then the solution
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solution has a detergent added to it to relax the surface tension of the water‚ allowing it to have more elastic‚ stretchy properties. Now it can act more like the skin of a balloon‚ stretching out nice and thin‚ trapping air inside of the bubble like a liquid balloon. II. Review of Related Abstract Making your own bubble solution is fun‚ but sometimes the bubbles don’t seem to work as well as the solutions you buy in the store. In this experiment you can test if adding corn syrup or glycerin to your
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800m to 3‚000m underground where is is then rotated 90° to drill though the shale layer. Fracking itself‚ is a “well-stimulation technique”‚ wherein a pressurised hydraulically liquid (chemicals and sand mixed in water) is pumped into the well‚ creating microscopic fractures or ‘fissures’ in the deep-rock. The sand in the liquid then travels into the fractures and keeps them propped open allowing natural gas and crude oil to escape the rock more easily. Fracking is generally applied to drilling wells
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sponge then there are different outcomes of how water is being absorbed. A Natural Sponge an aquatic invertebrate with a soft porous body. An Artificial Sponge is a piece of soft‚ light‚ porous substance made of synthetic material‚ now used to absorb liquid used for washing and cleaning. Sponge is combined with a scouring pad on one side and the fiber on the other. One of its main attractions is the embedded antimicrobial ingredients to take out the germs from turning it into a home for the germs. You
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