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Chemistry Essays

Result for Subject Chemistry:
1168 essays
Potential Harm from Halon Chemistry Essay
1 pages (250 words) , Download 2 , Essay
Free
Generally, according to the Material Safety Data Sheet of a fire extinguisher with recycled Halon 1301 and Methanol, human hazards include asphyxiation or suffocation due to lack of oxygen. Personnel who would be inhaling this toxicant will breathe heavier as well as this gas is much heavier than air.
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Monoammonium Phosphate Chemistry Essay
1 pages (269 words) , Download 2 , Essay
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It is quite important to state that the chemicals used in dry chemical agents may have an adverse effect on the health of people who are exposed to the chemical itself. Monoammonium phosphate, as a residue, can be harmful to the health especially with the characteristic of dry chemicals to collect in a mass.
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The Physical Chemistry Chemistry Essay
4 pages (1099 words) , Download 3 , Essay
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The two elements belong to the same group in the periodic table and have the same valence shell electronic configuration. Periodicity can be found in ionization energies and electronic affinities along the groups in the periodic table (Atkins). This prediction can be made because of the arrangement of atoms on the basis of valence shell electrons in the periodic table.
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Organic and Inorganic Compounds Chemistry Essay
1 pages (290 words) , Download 6 , Essay
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Those compounds which are of mineral origin were termed as inorganic compounds while those compounds which are of vegetable or animal origin are termed as organic compounds. The examples of the inorganic compounds are considered to be table salt, marble and carbon dioxide whereas the organic compounds are considered as acetic acid extracted from vinegar, etc.
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Determination of nitrogen dioxide content of the atmosphere Chemistry Lab Report
7 pages (1750 words) , Download 2 , Lab Report
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The method is used for manual determination of nitrogen dioxide in the atmosphere present in the range of 0.005-5 parts per million by volume or 0.01-10 µg/L. Sampling was conducted by the use of fritted bubblers. The sample is absorbed in a 60 µm pore diameter fritted bubbler tube.
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Application of Le Chatelier's Principle and Catalysis Chemistry Lab Report
8 pages (2290 words) , Download 3 , Lab Report
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Generally, it is quite essential to state that special emphasis was given to the application of catalysis and Le Chatelier's principles. While all processes were designed to increase the yields, at times some of the principles were compromised for other considerations such as improving the reaction rate.
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Tetracycline Antibiotics Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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In the current world, there are many different types of tetracycline antibiotics that are widely used. Tetracycline antibiotics were obtained after the systematic screening of soil. They are broad spectrum in action and are effective against a number of gram-positive, gram-negative bacteria, rickettsiae, and Chlamydia.
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Formulae, Moles, Molarity Chemistry Assignment
6 pages (1669 words) , Download 3 , Assignment
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The empirical formula of a substance tells us the relative number of atoms of each element it contains. Because of experimental errors, the results may not lead to exact integers for the ratios of moles. Thus we must multiply 2 to get the integers 2 and 3, for Fe and O subscripts respectively. 
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Immunohistochemical method for identification of ebstein barr virus from the tonsil tissue Chemistry Essay
2 pages (500 words) , Download 6 , Essay
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Epstein Barr Virus, commonly referred to as ‘EBV’ belongs to the herpes virus family. It is one of the most commonly found human viruses. This study used the samples of tonsils from patients suffering with the chronic tonsillitis. So, a total of fifteen tonsillar tissues were obtained from eight donors.
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Photochemistry of Ruthenium Complexes Chemistry Essay
7 pages (2207 words) , Download 2 , Essay
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Plants, through specialized structures called chloroplasts (or chromophores), trap the energy coming from the visible spectrum of sunlight. Chromophores are able to trap energy due to their large conjugated double bond systems. Once a photon, or stream of light particles, is absorbed, its energy is transferred to the electrons in the double bonds.
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The History of DDT Chemistry Essay
5 pages (1250 words) , Download 2 , Essay
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In 1962, just 14 years after Paul Hermann received the Noble prize for his discovery of the "high efficiency of DDT as a contact poison against several arthropods", author and environmentalist Rachel Carson alerted the American public to the irreversible chain of evil introduced by the notorious pesticide.
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Chemical Process Control an Introduction to Theory and Practice Chemistry Essay
4 pages (1227 words) , Download 2 , Essay
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There are several requirements imposed on a plant by designers and the general social, technical and environmental conditions in the presence of ever-changing external influences. The most important of these requirements is safety. This is primary, in order to ensure the well being of the people in the plant.
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Respective Properties of Macromolecules and Enzymes Chemistry Research Paper
7 pages (1822 words) , Download 2 , Research Paper
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Visual observation of simply adding a few drops of salad oil in water shows that oil is less dense than water and is immiscible. The enzyme reaction was studied using the enzymes Tyrosinase and Sucrase. The effect of different physical parameters including temperature, enzyme concentration, and pH was determined for the enzyme tyrosinase.
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Chemistry of the Drug Lithium Chemistry Essay
4 pages (1000 words) , Download 2 , Essay
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Looking at the periodic table, lithium is assigned group number 1 and period number 2. Therefore, it is group 1 (IA) element containing just a single valence electron (1S22S1).
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Improving the Consumption of Dietary Fibre Chemistry Research Paper
13 pages (3250 words) , Download 2 , Research Paper
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There is no recommended dietary intake (RDI) for fibre as such in Australia. However, the Australian Department of Health has among its dietary goals for Australians an increased intake of fruit, vegetables, bread and cereals, all of which are sources of dietary fibre. The greatest amount of dietary fibre in wheat is in the outer layer or bran.
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Harnessing Solar Energy to Reduce Dependence on Fossil Fuels Chemistry Term Paper
6 pages (1573 words) , Download 2 , Term Paper
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We cannot imagine life on earth without the light, warmth, and energy given out by the sun. Millions of years ago, when the solar system was in the process of evolution, numerous physical and chemical changes were taking place on the earth, both on the crust and inside the core of the earth. Various life forms evolved and perished in the process.
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Candida Albicans Microbe Chemistry Article
6 pages (2096 words) , Download 2 , Article
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The median cumulative dose of ABLC in patients >65 years of age and those < or = 65 years of age was similar. Despite higher median pretreatment serum creatinine (S-Cr) among patients >65 years of age (1.7 mg/dl vs. 1.4 mg/dl, respectively), both groups showed only a 0.1 mg/dl median S-Cr change from baseline by the end of therapy (P = 0.525).
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Infra Red Spectroscopy in Chemistry Chemistry Essay
13 pages (3250 words) , Download 2 , Essay
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Infra-red (IR) spectroscopy is an experimental tool for obtaining information about the chemical structure. Molecules can absorb infra-red light of frequencies that match theenergy of changes in the molecular vibrations. Infra-red spectroscopy is therefore often also called vibration spectroscopy.
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Introduction to Organic Chemistry Chemistry Essay
3 pages (973 words) , Download 11 , Essay
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Organic chemistry is a specific branch of chemistry, basing off of the study of the element carbon, and its relations to life and the world around it. Sometimes called “life” chemistry because of living things' presence of carbon, organic chemistry includes reactions, formulas, and processes, which are all based on carbon chains and their unique properties.
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Spectrophotometric Investigation of a First Order Reaction Chemistry Assignment
5 pages (1561 words) , Download 2 , Assignment
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The author states that in this investigation a photon (light) source is used, light of this source is made to pass through a standard cell containing the reaction system an aqueous solution. The intensity of the transmitted light is measured by a detector. The amount of the absorbed light depends on the molar absorptivity of the reactant.
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Sodium Chloride an Important Compound Chemistry Essay
4 pages (1190 words) , Download 3 , Essay
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The author states that the salt is halite, chemically known as Sodium Chloride, and commonly known as rock salt is one of the few very important reagents in the chemical industry today. The salt is found in the form of evaporative deposits after its crystallization out of the brine lakes through evaporation with time.
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Malathion, the Benefits of its Application Outweighs the Validated Risk Chemistry Article
3 pages (750 words) , Download 2 , Article
 But choosing which is better between two negative options is a tough decision to make. This is the predicament of Genericville City Council currently tasked to choose between natural control and avoidance of deadly West Nile Virus (WNV) carrier mosquitoes as against the use of harmful pesticide Malathion for its control. 
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The Amphibole Family: Asbestos Chemistry Assignment
4 pages (1000 words) , Download 2 , Assignment
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The author states that chrysotile, belongs to the serpentine family of minerals, while all of the others belong to the amphibole family. All forms of asbestos are hazardous, and all can cause cancer, but amphibole forms of asbestos are considered to be somewhat more hazardous to health than chrysotile.
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Reaction of Vicodin Chemistry Essay
2 pages (526 words) , Download 2 , Essay
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The author states that Hydrocodone Bitartrate 5 mg is formed with 500mg acetaminophen; these two drugs together make up a Vicodin tablet. Along with these two active ingredients, there are many inactive chemicals are used to make Vicodin which are, colloidal silicon dioxide, starch, croscarmellose sodium, dibasic calcium phosphate.
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Chemical Synapses and Effects of the Neurotransmitter Chemistry Essay
2 pages (643 words) , Download 2 , Essay
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The transmission of the information at chemical synapses involves the release of a neurotransmitter from a presynaptic cell, diffusion across the synaptic cleft, and binding of the neurotransmitter to specific receptors on the postsynaptic membrane to produce a change in membrane potential. In chemical synapses, there is a gap between the presynaptic cell membrane and the postsynaptic cell membrane, known as the synaptic cleft.
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Modern Methods of Organic Synthesis Chemistry Essay
1 pages (351 words) , Download 2 , Essay
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The synthesized compound, P-methyl acetophenone, belongs to the ketone functional group because it has the RCOR' arrangement. The mode of reaction of ketones is that they undergo addition reactions such as nucleophilic and electrophilic addition reactions. They are less reactive than aldehydes because of the presence of alkyl (CH3) group(s).
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Are Perfluorochemicals Widespread in Biosolids Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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The author states that in an effort to identify the provenance of the perfluorochemical contamination, officials at the EPA have begun investigating the monitoring data of local industries involved in the manufacture and usage of these chemicals. However, some companies, specifically those involved in metal plating, do not record this data.
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Composition of acid rain Chemistry Essay
10 pages (2500 words) , Download 3 , Essay
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"The pH scale is used to measure the acidity or alkalinity of an aqueous solution and is determined by the hydrogen ion (H+) content" ("Measuring Acid Rain"). This scale ranges from 0 to 14, moving from strongly acid to strongly alkaline, respectively, with the point 7 representing neutral.
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Haber Process, Energy Considerations and Heat Exchange Chemistry Assignment
5 pages (1356 words) , Download 2 , Assignment
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The raw materials used in the manufacture of ammonia are nitrogen and hydrogen. Hydrogen is obtained by reacting methane with steam and thus creating carbon dioxide and hydrogen. The nitrogen is obtained from the air by fractional distillation since the mixture of air consists of approximately 78% nitrogen.
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Topical Issues of Applied Chemistry Chemistry Assignment
7 pages (1750 words) , Download 2 , Assignment
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Visible parts of the electromagnetic spectrum are capable of effecting electrons from the surfaces of metals. (Photoelectric emissions). The electrons emitted are called photoelectrons - the energy required to just eject an electron from the surface of a neutral material without setting that electron in motion is called work function.  
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Disposition of Toxic Drugs and Chemicals Chemistry Lab Report
8 pages (1750 words) , Download 2 , Lab Report
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The author explains that Forensic Science deals with the study of serology and DNA especially in the forensic crime laboratory, “serology analysis” refers to the screening of evidence for bodily fluids. It is imperative to perform body fluid detection on evidentiary items before they are sent for DNA analysis.
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Hazardous Wastes Issues Chemistry Essay
2 pages (596 words) , Download 2 , Essay
Free
The waste may be liquid, solid, or sludge and contain chemicals, heavy metals, radiation, dangerous pathogens, or other toxins. Even households generate hazardous waste from items such as batteries, used computer equipment, and leftover paints or pesticides. The waste can harm humans, animals, and plants if they encounter these toxins.
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Arsenic: Sources, Transport and Distribution, and Health Effects Chemistry Term Paper
7 pages (1750 words) , Download 2 , Term Paper
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Included in the chemicals studied for its effects is Arsenic. Arsenic, from the Greek work arsenikos, is a naturally occurring element within the Earth's crust. Represented in the periodic table by the symbol As with an atomic number of 33, arsenic occurs in three allotropic forms, yellow, black and grey.
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Hazards of Carbon Dioxide Fire Suppression System Chemistry Essay
1 pages (329 words) , Download 2 , Essay
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Senecal has shown that the gas works by diluting the concentration of fire-reactive gases, therefore, slowing the rate of flame chemistry. Benefits in using this gas include not needing superpressurization, any reactivity with most materials and not needing a clean-up agent because it leaves no residue.
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Factors to consider for the design and development of emulsion Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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A very common example of this mixture is oil-in-water or water-in-oil. It is very important to know the identity of the chemicals you are dealing with when applying emulsion. Physically, the mixture of two immiscible liquids is very visible to the eyes because of the phase interfaces of scattered light passing through the emulsion.
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Discover the Universe of an Atom Chemistry Essay
1 pages (710 words) , Download 2 , Essay
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The author states that the path followed to get the products does not matter since the energy used or consumed is the same irrespective of the path. For example, when you burn Carbon in excess Oxygen or in little Oxygen and then Carbon monoxide in little Oxygen the end product will be Carbon dioxide and the energy summation is the same in the two paths.
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Why is anhydrous aluminum chloride a covalently bonded dimer Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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On the other hand, when nonmetals formed a compound, they share electrons forming a covalent bond. Taking anhydrous aluminum chloride, AlCl3 for instance, Aluminum is a metal and Chlorine is a nonmetal, by nature they should have formed an ionic compound.
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Clone Human Gene from cDNA Libraries Chemistry Essay
3 pages (1020 words) , Download 3 , Essay
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These cDNAs are complementary to the messenger RNAs (mRNAs), which encode for various proteins studied by researchers. Prior to that, it is of the essence that one understands what a clone, a library and a vector are with reference to gene cloning. First, cloning is the separation or isolation of the genetically homogenous strain of an organism (Lassen et al., 2005).
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The Construction of a cDNA Library from an Extract of Human Brain Cells Chemistry Essay
3 pages (1032 words) , Download 2 , Essay
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A complementary DNA library refers to a blend of reverse-transcribed mRNA pieces inserted into a group of host cells. cDNA is made from wholly transcribed mRNA found in the nucleus of cells and therefore contains only the expressed genes of an organism. The establishment of cDNA libraries is important in disease research, genome construction and research for drugs and alternative medicine.
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Clinical biochemistry and advanced assessment in nutrition Chemistry Assignment
3 pages (750 words) , Download 2 , Assignment
Pyruvate dehydrogenase complex is an important enxyme complex that particularly works by transforming pyruvate into acetyl-CoA through a process known as pyruvate decarboxylation (Smolle 196). The resultant product (acetyl-CoA) is then normally used during the citric acid cycle to enhance cell respiration.
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Clinical biochemistry Chemistry Assignment
3 pages (750 words) , Download 4 , Assignment
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The process of O-methylation normally occurs in one of the degenerative pathways of catecholamine transmitters. In this regard, the pathways include dopamine degradation and betaxanthin biosynthesis. Encoded by COMT gene, Catechol-O-methyltransferase also plays a critical role in the metabolism of many catechol drugs used in the treatment of hypertension, Parkinson’s disease and asthma.
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The chemisrty in onions Chemistry Research Paper
4 pages (1000 words) , Download 2 , Research Paper
The crop is harvested and dried and then ready for storage or use. Onions can be eaten raw or cooked. The mixture of chemical substances in the onion cells react upon each other upon chopping causing a rapid irritation on the eyes. During the process of chopping an onion, the cells are damaged allowing alliinases enzymes to split the amino acid sulfoxides generating sulfenic acids with a general formula RSOH.
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Lipoprotein Abnormalities Associated with Alzheimer Disease, Diabetes, Atherosclorosis Chemistry Essay
10 pages (2924 words) , Download 3 , Essay
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Lipoproteins are separated into various categories based on the density at which they float through ultracentrifugation. These macromolecules are further categorized depending on electrophoretic ability, particle size, or affinity chromatography. These specific classes have distinct metabolic functions.
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Acid base titration Chemistry Lab Report
5 pages (1250 words) , Download 7 , Lab Report
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Acid base titration Aim The experiment intended to ascertain concentrations of Dilute Hydrochloric acid and Dilute Sulphuric Acid solutions by conducting Acid-Base titrations. Hypothesis Phenolphthalein change of color from pink/purple to colorless signified a transformation of the solution’s nature from being basic to acidic, which was the reaction’s endpoint or neutrality point.
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Introduction of research Chemistry Research Paper
3 pages (750 words) , Download 2 , Research Paper
Research has shown that the plasmonic influences of Surface Enhanced Raman Spectroscopy (SERS) contribute a very significant role in improvement of the signal, the importance of the chemical effect as a result of analyte chemisorptions on the surfaces of silver and gold is not widely acknowledge due to scanty research on the subject.
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PH Titrations Process Chemistry Lab Report
6 pages (1524 words) , Download 3 , Lab Report
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To aid an experimenter in this situation, a halochromic organic compound known as ‘indicator’ (s.a. phenolphthalein, methyl red, methyl orange, and bromothymol blue) is incorporated where the appearance of color change from clear solution signifies the ‘end point’ or the point assumed to be nearest the point of equivalence.
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The pH at Different Points of the Unknown Acids Concentration Chemistry Lab Report
4 pages (1050 words) , Download 2 , Lab Report
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A standard solution is defined as a reagent. In most cases, a concentration that is known reacts with the titrant volume to establish the concentration. Titration involves a group of experiments in which the known solution property is utilized in inferring the unknown property of a different solution.
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The Fischer Esterification Process to Synthesize an Ester Chemistry Admission/Application Essay
8 pages (2237 words) , Download 3 , Admission/Application Essay
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The H-NMR spectrum of the products indicated the same number of protons located in the same positions in the ester structure. The COSY and HMQC results augmented the results obtained under C-NMR and H-NMR. A spectroscopic test of the product (IR, GC-MS, and NMR) correctly proved that the product was actually Ethyl propionate
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The Discovery of Soda Drinks Chemistry Essay
3 pages (1032 words) , Download 3 , Essay
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Soda drinks are things like Coke, Sprite, and Pepper, as well as any carbonated and sugared. The discovery of Soda drinks came at hand in the year 1879 and was later availed popularly in the year 1890 by many people globally. Being a delicious drink, there is the chemistry behind soda drinks that involves carbonation processes, which are evident by the provision of bubbles.
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Portland Cement: What We Build With Chemistry Essay
12 pages (3000 words) , Download 2 , Essay
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Cement has been a part of almost everything that man has built to improve his life. The chemistry and technology involved in its production has significantly contributed to the development of the world that we have today. On the other hand, environmental and even occupational issues comes hand-in-hand with this industry.
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