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Chemistry Essays

Result for Subject Chemistry:
1168 essays
Exponential Decay of a Transition Metal Complex Ion Chemistry Lab Report
2 pages (500 words) , Download 6 , Lab Report
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High temperatures increase the rate of collision and thus speeding up the rate of decay in transition elements. At normal temperatures microorganisms are able to survive and thus speeding up the
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Lab biochemistry Chemistry Coursework
2 pages (500 words) , Download 2 , Coursework
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All of these graphs have absorbance (340nm) on the y-axis and Time (min) on the x-axis. The graphs were drawn individually however due to a great deal of overlap in the data, it was better to
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The Issue of Safe Chemicals Act Chemistry Essay
9 pages (2250 words) , Download 2 , Essay
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It is a paradox that however useful, some of these chemicals negatively the environment and affect human health. Ergo, they need to be properly regulated and monitored in order to address health and safety risks. Congressional interest in revising chemical control laws has heightened in recent years.
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The Poisoning Needle Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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There birds fed on small fish and bred on the shores. This behavior of the birds was unanticipated and instigated a wave of curiosity in the scientists and researchers. About two and a half decades later, in
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Measurement of the Turbidity of Raw Water and Study the Effects of Coagulation and Flocculation Chemistry Lab Report
1 pages (250 words) , Download 2 , Lab Report
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The process of flocculation involves the formation of flocs through clinging together of solid matter in solution. Coagulation results due to widening of solid material in solution making separation possible
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Conservative vs. Non-conservative Amino Acid Substitutions Chemistry Assignment
1 pages (351 words) , Download 5 , Assignment
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The paper also shows that it may have no effect on the functioning of the protein. Since the substitution is not harmful to the DNA there are no changes to be observed. Impact on nutrition may not also be observed since the protein remains the same, save for the substituted amino acid (Ng and Henikoff, 870).
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The Drug Diazepam in Pharmacology Chemistry Essay
17 pages (4250 words) , Download 2 , Essay
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This essay analyzes that Fluconazole is an antifungal that belongs to a group of drugs known as azoles that increases the effects of Diazepam by increasing the levels of Diazepam available in the plasma at any given time. Fluconazole increased the level of Diazepam two and a half times thereby increasing the sedative effects of Diazepam.
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Research paper on radiation Chemistry Research Paper
2 pages (500 words) , Download 2 , Research Paper
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In other words, radiation can be electromagnetic or particulate. Examples of electromagnetic radiation are x rays and gamma radiation whereas examples of particulate radiation are alpha radiation and beta radiation. The nonionizing
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Hydrogels Polymers Chemistry Essay
8 pages (2165 words) , Download 2 , Essay
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They swell in water and can absorb a large volume of water; this can only be compared to a couple of times the volume of dried gel. However, chefs among them are temperature, pH, ionic strength, solvent composition, and light and electric field, Al these are stimuli-responsive Hydrogels that are useful in the development of a number of appliances.
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Summary and poems Chemistry Assignment
1 pages (250 words) , Download 2 , Assignment
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Electrochemical reactions occur when a chemical reaction is followed after application of external voltage in a process known as electrolysis. This can be clearly illustrated by what takes place in a battery. In the same way, chemical reactions do occur in molecules;
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Adsorption/desorption of Chlorohexidine (CHX) on Flax and Cotton fibers Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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This simply implies that less chlorhexidine was left in the solution with flax than in cotton due to the fact that flax has adsorbed more chlorhexidine than cotton. It appears that flax can adsorb almost twice the amount of chlorhexidine cotton can adsorb. This suggests that
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The Error Rate and Concentration of the Unknowns Chemistry Coursework
2 pages (635 words) , Download 5 , Coursework
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Error value for calculating the sample concentration using peak area is given by the formula, Error rate = (standard deviation for peak area/average of peak area) 100 % Error rate = (1338029.784/69124507.67)100 % Error rate for peak area = 1.9356 Error value for calculating the sample concentration using peak height is given by the formula.
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How much Gas is Preduced Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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If it so happens, that in a chemical reaction one or more reactants or products are gases, gas laws must be considered for the calculation. The Ideal Gas Law states that; where P is the pressure (in atm), V is the volume (in Q), n
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Drug Zafirlukast/bioavailability Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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Drug absorption depends on degradation, diffusion, transport and permeability factors of the drug which in turn influence its
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Scientific American article about cholesterol Chemistry Essay
2 pages (500 words) , Download 3 , Essay
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The goal of the research was to find out if lowering low density lipoprotein or increasing the levels of high density lipoproteins had any effect on the occurrence of heart attacks or strokes1. This
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Techniques of Organic Chemistry Chemistry Lab Report
1 pages (296 words) , Download 4 , Lab Report
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The dehydrating agent was to remove the OH group from the cyclohexanol leading to the formation of cation as the intermediate product and thereafter remove a hydrogen atom from the cation resulting in the formation of cyclohexene. The mixture of approximately 10g of cyclohexanol, 3 mL of 85% phosphoric acid and 1-2 boiling chips was put inside the distillation flask.
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Fully discuss absortion and emission spectroscopy follows instruction below Chemistry Assignment
2 pages (500 words) , Download 2 , Assignment
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Basically, the flame is used to atomize the sample so that radiation emitted is measured. Understanding the principle of atomic emission spectroscopy would require a brief description of the instrument used. This would offer us an insight on the principles involved in
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Characteristics of Alcan Chemistry Case Study
4 pages (1000 words) , Download 2 , Case Study
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The faster rate of change is because at Alcan all the departments have their own IT employees who work for them. Thus each department tries to give their most and their best. The cost for IT is around $300 Million for Alcan which is a huge amount and shows its efficiency. Still, $200 million were spent on IT by the IT department.
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Should we mine this Ore Chemistry Essay
2 pages (500 words) , Download 2 , Essay
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The CuSO4 solution has the deepest blue color that absorbs more light than a solution of lower concentration, for example, Copper (II) acetate. Atomic Absorption Spectroscopy (AAS) technique is used to determine the absorbance of the solutions. Five standard
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Ionic Reactions Chemistry Lab Report
3 pages (750 words) , Download 2 , Lab Report
Questions: A) It is clearly seen that solubility rules are generally followed in all the experiments. By using them, it is possible to predict the outcome of almost any exchange reaction.
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History of penicillin Chemistry Essay
2 pages (500 words) , Download 5 , Essay
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In general, antibiotics are natural substances discharged by fungi and bacteria into their surroundings, as a means of restraining other organisms. This paper will discuss the history of penicillin from its discovery, development and
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Factors Affecting the Rate of a Chemical Reaction: The Kinetics of a Thiosulfate Solution Chemistry Lab Report
4 pages (1131 words) , Download 2 , Lab Report
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A usual procedure is to monitor some properties, such as the intensity of color due to a reactant or product, which changes during a reaction. In the present experiment, the priority studied is the precipitation of a product, sulfur, which forms when a solution of hydrochloric acid and Thiosulfate are mixed.
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Factors affecting the rate of a chemical reaction The kinetics of a Thiosulfate Solution Chemistry Lab Report
5 pages (1250 words) , Download 3 , Lab Report
As an anion, thiosulfate is tetrahedral in shape and is depicted by replacing one of the oxygen atoms by a sulfur atom in a sulfate anion. The S-S distance suggests a single bond, an indication of a significant negative charge borne by the sulphur
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Effects Of Hazardous Materials On Fire Service Chemistry Essay
6 pages (1649 words) , Download 2 , Essay
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Evacuate means to move all people from the endangered area to a protected place. Thirdly managing the people evacuated to a safer place. This procedure is called in place protection. In place, security means to direct people to rapidly go inside a building and stay inside until the risk passes.
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Atomic Weight of Magnesium Chemistry Lab Report
1 pages (250 words) , Download 16 , Lab Report
Free
In this experiment, the validity of balanced equations was demonstrated by accurately predicting the molecular weight of Magnesium, supposedly a constant
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PH Scale and Chemical Reactions Chemistry Essay
1 pages (359 words) , Download 3 , Essay
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pH is calculated by taking the negative log of the concentration of H+ ions present in a solution. A 1 molar sulfuric acid has a pH of zero while caustic soda or concentrated sodium hydroxide has approximately 14 pH. Substances react differently depending on the pH they have. Solutions having very high or very low pH are corrosive.
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Measuring Mass Using a Centigram and an Electronic Balance Chemistry Lab Report
3 pages (961 words) , Download 7 , Lab Report
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Weighing by difference gives more accurate results because when the readings are subtracted then any zero error due to the wrong calibration of the instrument will be removed from the final reading. In the case of weighing a mass directly if the instrument contains a zero error, it will show up in the reading obtained which will then be inaccurate. 
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Gas Laws and Soultions Chemistry Coursework
1 pages (250 words) , Download 2 , Coursework
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3. The titration involves the reaction NaOH + HCl  NaCl + H2O. The pH of the solution when it becomes neutral is at pH 7.0. Bromothymol blue is the best indicator for this reaction because it has a
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Standard Operating Conditions Chemistry Lab Report
2 pages (527 words) , Download 2 , Lab Report
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The highest S/B ratios are for K, Mg, and Ca followed by Mn and P. [Table -5] b. Which element had the lowest experimental signal / Background (S/B) ratios Ans: The lowest S/B is observed for Pb. [Table -5] 2. Discuss the effect of changing from radial to axial viewing. Which elements (if any) might you recommend measuring by axial viewing?
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Method of chemical strengthening Chemistry Coursework
3 pages (1000 words) , Download 2 , Coursework
The author of the paper states that another method of strengthening is called chemical strengthening. This is where the glass material is submerged into a potassium nitrate solution. The high-mass potassium molecule, which is bigger, then replaces the sodium molecule in the glass material.
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The Properties and Applications of the Metal Aluminum Chemistry Essay
7 pages (2110 words) , Download 3 , Essay
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Aluminum is a member of group III of the periodic table and is classified as a metal with properties lying midway between metals and metalloids. The 8% by weight of the Earth’s crust is made up of aluminum which makes it the most abundant metal in the Earth’s crust and also the third most abundant element.
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Fruit Content of Fruit Juice and Apple Juice Content of Cider Using DNA Methodology Chemistry Literature review
10 pages (2973 words) , Download 2 , Literature review
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RFLP is widely used for the analysis of the adulterants in the samples because of its low cost and greater differentiating ability. The RAPD is the more fast technology that requires only very simple primers and the previous sequence information is not required for the analysis. RAPD is more sensitive to a variety of plant species.
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Chemical Substances Fungicides Chemistry Essay
1 pages (250 words) , Download 2 , Essay
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According to the paper, Fungicides, fungicides are chemical substances that are widely used to compromise the growth of pathogenic fungi. The fact that fungicides can control a wide range of fungi elicit the question of how this happens, some of the advanced reasons as to how the fungicides work include the following.
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The Quality of Tap Water Sample Chemistry Lab Report
1 pages (351 words) , Download 3 , Lab Report
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Guidelines towards achieving a contamination-free and safe water are followed strictly. The source of water must be deep enough so that contaminants coming from the soil cannot reach it. After the water has been pumped up to the storage facilities, the water is further sanitized using chlorine to kill harmful microorganisms.
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Should Ethanol Be Required in Gasoline Chemistry Annotated Bibliography
2 pages (513 words) , Download 3 , Annotated Bibliography
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This article was initially appeared in the Chicago Sun-Times on January 27, 2007. It was written by Jerry Taylor and Peter Van Doren. This article mostly argues against the usage of ethanol in gasoline. It tries to discard some of the prominent claims of the advantages of ethanol in gasoline, with the help of quoting the opinions of experts and scientific studies.
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Philadelphia Snacks Breadsticks Chemistry Essay
3 pages (750 words) , Download 2 , Essay
Energy is basically the measurement of the amount of energy a food item produces when metabolized by the body (Kirschmann, 2007). Carbohydrates are composed of the elements carbon, hydrogen, and oxygen and are the main source of energy in the human body. Energy in the form of heat is produced when carbon combines with oxygen in the bloodstream.
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Lysol as Household Product Chemistry Case Study
1 pages (250 words) , Download 6 , Case Study
Free
Most people know Lysol kills germs. I would work with the slogan ‘kills 99.9% of household germs’. Along with this phrase, a new slogan could be added. ‘Germ destroyer’ or ‘H1N1 fighter’ could be used with the original slogan. If using ‘H1N1 fighter’ as a slogan, this would achieve many goals. By using the specter of H1N1 it can cause the consumer to switch to Lysol through anxiety.
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Physical and Chemical Properties of Methylene Chloride Chemistry Essay
3 pages (750 words) , Download 2 , Essay
Methylene chloride is described as very hazardous substance in case of eye contact, ingestion, inhalation or skin contact. Personnel using this chemical should protect themselves from exposure by wearing laboratory coats, safety goggles, vapour respirators (approved/certified) and gloves. Exhaust ventilation and other engineering controls should be provided to keep the airborne concentrations of vapours below the threshold limit value (TLV). 
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Molds and Volatile Organic Chemicals as Indoor Air Pollution Chemistry Research Paper
5 pages (1422 words) , Download 2 , Research Paper
Free
In general, there is a genuine risk of indoor air pollution, which can cause a serious health hazard. The presence of Molds and Volatile Organic Chemicals are certainly a threat to our health as the first causality can be our lungs and respiratory system, which get effected by inhaling of such compounds.
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Paraphrasing Paragraph about Phosphene and Alkynyl Ligand Chemistry Assignment
1 pages (250 words) , Download 2 , Assignment
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Like alkyl groups, alkynyl, alkenyl and aryl groups can bond to a metal form through a single carbon atom. For this property, these groups are described as “monohapto’. However, there is a possibility of each of these three groups accepting “pai” electron density into anti-bonding orbitals, although the same has not been observed, largely, so far. 
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The Necessary Precautionary and Preventive Systems of the Chemical Facility Chemistry Assignment
7 pages (1750 words) , Download 2 , Assignment
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There had been no reports around the world that such action-packed hostage-taking of some chemical facilities had ever been made known because with all the high-tech security measures being undertaken by magnificently high-financed chemical plants, no one would even attempt to get inside and forcefully steal chemicals vital to national security.
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Common Household Chemicals Found in Cells Chemistry Essay
2 pages (610 words) , Download 2 , Essay
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The author states that organic molecules contain carbon atoms that combine with other carbon, oxygen, nitrogen, or sulfur atoms to form polymers. Apart from these, water is the main constituent of a cell and all of us know how it is used in common households. Water, an inorganic compound, comprises 98-99 percent of the human body.
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Acid and Enzymatic Hydrolysis of Glycogen Chemistry Lab Report
4 pages (1573 words) , Download 8 , Lab Report
Free
This is the convenient, the relatively simplest method of estimation of the reducing sugar. The only drawback of this method is the low level of accuracy of the results. Though it is a straight reaction, it is expected that many side reactions occur such that the actual reaction stoichiometry is more complicated and varies for different sugars.
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Vikane Gas: Sulfuryl Fluoride Chemistry Coursework
13 pages (3664 words) , Download 2 , Coursework
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Sulfuryl fluoride is found to be a highly toxic gas, which can severely impact the central nervous system, the respiratory system, and other vital organs. Depending on the dosage and duration of exposure, the effects of sulfuryl fluoride on humans may be mild, severe, or fatal. Future research in this area should focus on developing a less toxic version of the fumigant on humans, but one that is more efficient for use as a pesticide.
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Drug Discovery And Development: The Development Of Diazepam As An Anxiolytic Chemistry Essay
7 pages (1348 words) , Download 2 , Essay
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On testing its chemistry, it was found that by using primary amine methylamine in the last step of the synthesis, the reaction showed a different pathway of ring enlargement. The product that resulted was benzodiazepine. Sternbach then filed a US patent for this compound in 1958. The compound was tested on 16000 patients and was then approved by the US Food and Drug Administration in 1960.
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Common Household Items Found in Cells Chemistry Assignment
1 pages (250 words) , Download 2 , Assignment
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Proteins cannot be made by RNA-based organisms, so they could live where main ingredients like sulfur, required for protein synthesis is absent. By extraction of DNA, the genome pattern of various species can be established. Scientists are rewriting the genetic code and using engineered bacteria making new proteins with new amino acids.  
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Composition of Reactive Powder Concrete Chemistry Research Proposal
4 pages (1000 words) , Download 2 , Research Proposal
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In recent times, concrete has become a complex material, which has become difficult to understand. Throughout the years, it has been experimented in order to improve its strength. Materials such as flash, marble dust, and several cementitious materials have experimented with concrete in order to improve its strength and other properties.
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Hydrogen Energy and Fuel Cells Chemistry Essay
6 pages (1500 words) , Download 2 , Essay
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Hydrogen is the simplest and most plentiful element on earth which does not exist by itself but combines with other elements to form substances from. Fuel cells unite oxygen and hydrogen to produce stationary or mobile electricity. A fuel cell comprises 1 electrolyte and 2 catalyst-covered electrodes.
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Bactericidal Effect of Silver Nanoparticles Chemistry Lab Report
1 pages (513 words) , Download 0 , Lab Report
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The author prepares eight nutrient broth cultures by adding 25 ml of nutrient broth to each of eight of the centrifuge tubes. He adds a colony of E. coli ATCC 15766 to each of four of the centrifuge tubes and adds a colony of Staphylococcus aureus ATCC 157293 to each of four of the centrifuge tubes.
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The Established Threshold for Hazardous Material Chemistry Assignment
1 pages (323 words) , Download 2 , Assignment
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The Emergency Planning and Community Right-to-Know Act (EPCRA) of 1986 establishes requirements for federal, state, and local governments and industry regarding emergency planning and "Community Right-to-Know" (CRTK) reporting on hazardous and toxic chemicals.” (US Environmental Protection Agency 2009)  
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