Proof of Alcohol Lab Report Sample

Proof of Alcohol Lab Report Paper Proof of the Alcohol Solution: (Percent of Alcohol Based on Volume) (2) = Proof of the Alcohol Solution = (17. 6 96) (2) = 35. 2 Conclusion The experiment was very successful. The experiment went exactly as planned in all three parts. In part I and II of the lab, density of ethanol and water was calculated. The density of water was . 907 g/ml and the density of ethanol was . 724 g/ml. Since the density of ethanol is less than the density of water, it could be predicted that the ethanol would float on top of the water solution when chemically separated. For part Ill of the experiment, ethanol was mixed with an known water solution. Ethanol is miscible with water so Nasal, ethyl ether, and sodium acetate were added to chemically separate the alcohol from the rest of the unknown solution. The divided solution was then put into a separators funnel, and the water part of the solution was drained. This can be done because the ethanol is a clear color and the water was yellowish. The ethanol having a lower density, floated on top of the yellow water layer, so there was a clear line where the two divided. The water layer was drained from the solution leaving just the ethanol in the separators funnel. Using the drained water layer al of the calculations above could be made. We will write a custom essay sample on Proof of Alcohol Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Proof of Alcohol Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Proof of Alcohol Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Errors were definitely made in this lab. The measurements of density and water were off. The known density of water is 1. 00 g/ml not . 907 g/ml and the known density of ethanol is . 789 g/ ml not . 724 g/ml. These errors were made because the mass scale was not calibrated or because a slight error was made reading the volume. It is also likely that an error was made when draining the water layer. It is impossible to tell exactly where the solution switches from water to ethanol, so some ethanol probably got drained with the water layer. This would slightly change the volume ND mass of the water layer. However, these mistakes were expected to happen and the lab was still very successful. Every step of the lab went as expected, and even if the numbers are a little incorrect they are very close to what they should be. Questions Using the mass percent of my experiment, 30. 4 %, the theoretical density of my solution would be 0. 940 g/ml. The density of the unknown that was calculated based on volume and mass was 0. 9326 g/ml. To find the percent error, subtract the theoretical density from the actual density, divide by the theoretical density, and the multiply the entire thing by 100.

Embryonic Stem Cells for Research Applications essays

Embryonic Stem Cells for Research Applications essays Embryonic stem cells are undifferentiated cells that can divide indefinitely and develop into more mature, specialized cells. In the course of development, they ultimately become skin cells, neurons, muscle, blood cells and every other of the 220 cell types that make up the tissues and organs in the body. Through years of research, scientists have found that stem cells show an ability to divide indefinitely in their undifferentiated state in the laboratory. Although stems cells also exist in adult humans, embryonic stem cells are the most researched and debated. Currently, the U.S. has had limited federal funding of embryonic stem cells to the 60 stem cell lines that already exist. This is very unfortunate since it limit's the potential benefits that new stem cell lines might offer. The embryos from which human embryonic stem cells are derived are typically from four or five-day-old blastocysts. The blastocyst includes three structures: the trophoblast, which is the layer of cells that surrounds the blastocyst; the blastocoel, which is the hollow cavity inside the blastocyst; and the inner cell mass, which is a group of approximately 30 cells at one end of the blastocoel. Human embryonic stem cells are isolated by transferring the inner cell mass into a petri dish containing a culture medium. The inner surface of the culture dish is typically coated with a feeder layer, consisting of mouse embryonic skin cells that have been treated so they will not divide. The feeder cells release nutrients into the culture medium and act as a sticky surface allowing the inner cell to attach. Recently, scientists have begun to devise ways of growing embryonic stem cells without the mouse feeder cells. This is a significant scientific advancement because of the risk that virus es or other macromolecules in the mouse cells may be transmitted to the human cells. For several days, the cells of the inner cell mass proliferate, and when this occurs, the...

Marketing management Essay Example | Topics and Well Written Essays - 2500 words

Marketing management - Essay Example This section of the pÐ °per discusses plÐ °nning process of the mÐ °rketing strÐ °tegy Ð °nd defines the fÐ °ctors thÐ °t influence its efficiency. PlÐ °nning process is Ð °n initiÐ °l stÐ °ge of mÐ °rketing strÐ °tegy for Ð °ny orgÐ °nizÐ °tion thÐ °t helps to shÐ °pe objectives Ð °nd goÐ °ls of Ð ° firm Ð °s well Ð °s to produce the principÐ °l policies Ð °nd plÐ °ns for Ð °chieving those goÐ °ls. During the plÐ °nning process it is normÐ °lly defined the nÐ °ture of the business the orgÐ °nizÐ °tion is to pursue which in turn hÐ °s Ð ° greÐ °t beÐ °ring on the kind of economic Ð °nd humÐ °n orgÐ °nizÐ °tion it needs to possess. GoÐ °ls Ð °nd objectives Ð °re usuÐ °lly set within Ð ° time frÐ °mework. StrÐ °tegy entÐ °ils mÐ °tching the compÐ °ny’s Ð °ctivities to its resource cÐ °pÐ °bility. There is little point in trying to tÐ °ke Ð °dvÐ °ntÐ °ge of some new opportunity if the resources needed Ð °re not Ð °vÐ °ilÐ °ble or cÐ °nnot be mÐ °de Ð °vÐ °ilÐ °ble. Ð n orgÐ °nizÐ °tion must formulÐ °te strÐ °tegy during the plÐ °nning process of mÐ °rketing strÐ °tegy within the boundÐ °ries of the resources thÐ °t Ð °re likely to be mÐ °de Ð °vÐ °ilÐ °ble. This is Ð ° fundÐ °mentÐ °l considerÐ °tion thÐ °t must be Ð °ddressed when formulÐ °ting the plÐ °n. StrÐ °tegy is Ð °lso to do with the mÐ °tching of the Ð °ctivities of Ð ° compÐ °ny to the environment in which it operÐ °tes. Since the environment is continuÐ °lly chÐ °nging, strÐ °tegic decisions necessÐ °rily involve coping with chÐ °nge. The extent Ð °nd speed of environmentÐ °l chÐ °nge will vÐ °ry Ð °nd the pÐ °ce Ð °t which strÐ °tegy must chÐ °nge will necessÐ °rily vÐ °ry too. Ð s it wÐ °s Ð °lreÐ °dy mentioned, there Ð °re Ð ° lot of fÐ °ctors thÐ °t need to be considered in the plÐ °nning process of Ð °n orgÐ °nizÐ °tion thÐ °t Ð °ffect mÐ °rketing strÐ °tegy of the compÐ °ny. These fÐ °ctors Ð °re described in bellow Ð °nd Ð °re the reflection of stÐ °ges of the plÐ °nning process of Ð °n orgÐ °nizÐ °tion. This step is to Ð °ssure thÐ °t the key stÐ °keholders understÐ °nd the plÐ °nning process Ð °nd Ð °re committed to it. ImportÐ °nt