Chemistry Essays

Objects having magnetic field is called as magnets. Normally magnets are of two types- Permanent magnets and Electro magnets. Permanent magnets are those magnets which occur in nature and do not depend upon external source for their magnetic field. On the other hand electromagnets are those magnets which use electric current to generate magnetic field. […]

The purpose of this lab was to find the theoretical and experimental percentage yields of the double displacement reaction between the solutions Lead (II) Nitrate (PbNO3) and Potassium Iodide (KI). It is important to obtain amounts of Lead (II) Nitrate and Potassium Iodide as close to 1. 44g as possible. This reaction creates Lead (II) […]

Chemistry, a branch of physical science, is the study of the composition, properties and behavior of matter. As it is a fundamental component of matter, the atom is the basic unit of chemistry. Chemistry is concerned with atoms and their interactions with other atoms, with particular focus on the properties of the chemical bonds formed […]

To provide a current and relevant report of impression materials available to clinicians. Sound knowledge is imperative to achieve an accurate replica of intra-oral structures and good quality fixed and removable prostheses. Introduction Impression material can be classified as elastic or ridged. The ridged impression materials cannot engage undercuts that may present on teeth or […]

Located near the summit of Mauna Kea in Hawaii, the KECK observatory consists of two telescopes, namely KECK I and KECK II, which are positioned in close proximity to one another. Both the KECK observatory and GTC in the Canary Islands boast some of the world’s largest optical telescopes, with primary mirrors made from identical […]

The Production and Consumption of Sugar The production of sugar has shaped our world throughout the centuries. From its humble beginning, to its royal induction it has now made a household name as a necessity. It has changed our society into sugar addicts with a never ending urge for sweetness. Production of this craving has […]

Conductivity Solutions Abstract: We produced conductivity tests in water and other various solutions with a computer faced Conductivity Probe using the unit of microsiemens per centimeter (uS/cm) to find out which solutions had a high conductivity and which solutions had a low conductivity. Many different solutions vary in conductivity due to the ratio of ions. […]

Objective: The objective of this lab was to find and examine the viscosities of ideal and non-ideal solutions. The ideal being the toluene/p-xylene and the non-ideal being the methanol/water. The second objective of this lab was to investigate the temperature dependence of viscosity (Halpern, 17-1). Introduction: Viscosity is the resistance to flow of a certain […]

Abstract Experiment 55 consists of devising a separation and purification scheme for a three component mixture. The overall objective is to isolate in pure form two of the three compounds. This was done using extraction, solubility, crystallization and vacuum filtration. The experiment was carried out two times, both of which were successful. Background Information: This […]

In the periodic table, 80% of the elements are metals. Of the metals, aluminum is the most abundant in the earth’s crust. Aluminum is concentrated in the outer 10 miles (16 km) of the Earth’s crust, of which it constitutes about 8% by weight; it is exceeded in amount only by oxygen and silicon. 1 […]

Abstract: The purpose of this experiment was to synthesize isopentyl acetate via an esterification reaction between acetic acid and isopentyl alcohol, using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate, as well as with water, then dried with anhydrous sodium sulfate. The product was then distilled using a Hickman […]

The Cell membrane surrounds all living cells and is the most important organelle, there is also a similar plasma membrane that surrounds all the organelles except for the ribosome. The membrane controls how and what substances can move in and out of the cell/organelle The structure of the membrane is often referred to as the […]

Brand: Garnier Fructis–Fortifying Shampoo (With active fruit concentrate) Ingredients: Aqua/Water, Sodium Laureth Sulfate, Dimethcone, Cocamidopropyl Betaine, Cocamide Mipa, Distearyl Ether, Sodium Chloride, Behenyl Alcohol, Niacinamide, Guar Hydroxypropyltrimonium Chloride, Saccharum Officinarum/Sugar Cane Extract, Sodium Methylparaben, Dmdm Hydantoin, Ppg-5-Ceteth-20, Camellia Sinensis/Camellia Sinensis Leaf Extract, Linalool, Pyrus Malus/Apple Fruit Extract, Carbomber, Pyridoxine Hcl, Citric Acid, Butylphenyl Methylpropional, Citrus […]

The United States is a leading producer of refined petroleum and a major player in the global decision regarding this industry.Our country is beset by a shrinking supply or decline in production, pressures of environmental concerns, yet increase in demand. These problems are not unique to our country. Globally, we are dealing with a resource […]

How was the product idea generated? A baby boomer is an American-English term to describe a person born between 1946 and 1964. Following World War II, these countries experienced an unusual spike in birth rates, a phenomenon commonly known as the baby boom. It is uncontested that baby boomers define the market trends. For instance, […]

Bryan Schaeffer Mountain Dew The Mountain Dew case centers on the decision that the BBDO team and Pepsi executives made in regards to the Super Bowl advertisements to be aired in 2000. The creative team came up with 10 possible scenarios. Since their meeting took place in October (4 months prior to the Super Bowl) […]

Abstract: One is to determine the gap energy of cadmium sulfide semiconductor thin film using the equation: Eg = h.c/ is the signal of the long wavelength limit of the absorption peaks (measured in the lab). The reaction between cadmium sulfide and NH3, in the presents of thiourea yield a ? of 579(nm). The  error […]

Researching Succession in Sand Dunes. Scientific Understanding: Succession refers to the gradual transformation of a community’s composition over time, as a result of the actions of its inhabitants. Primary succession takes place when a community establishes itself on barren terrain that has never experienced vegetation growth. Primary succession can be observed in sand dunes while […]

English Indian Clays Ltd is a company that has two main business segments, the Clay Business and Starch Business, both of which are backed by a strong R&D set-up at all three of its manufacturing locations. The company was formed on November 18th, 1963 through a collaboration with English China Clays Limited, which is now […]

ABSTRACT The microevolution of Alu element TPA-25 was tested in the experiment through the examination, observation, and analysis of population alleles distribution under the Hardy-Weinberg Theory of Genetic Equilibrium. Alu elements affect the genome by causing insertion mutations, recombination between elements, gene conversion, and alterations in gene expression. In the lab PCR was used to […]

The sun is the originator of solar energy, which serves as Earth’s primary source of power. By utilizing matter’s position and movement in conjunction with acting forces, this energy causes noticeable alterations to ocean currents and weather patterns while heating up the planet’s surface. There are different types of energy, including mechanical, thermal, chemical, electrical, […]

AIMS The aim of this experiment was to investigate the effect of temperature rise on the rate of transpiration of a plant (hibiscus) by measuring the plant’s water uptake in a period of time. HYPOTHESIS Transpiration is the process by which plants loses water to the atmosphere from their leaves. Water in the plant is […]