Chemistry Essays

Chemistry essays are different from those who are more related to creative writing. They should be based on critical thinking, logic, and proper evaluation. Sometimes these essays are built on solving chemical equations and other problems. You need to have the solid theoretical background to prepare homework which deserves the highest grade. When students cannot cope with the tasks alone, they seek help at writing service. Our company is one of the best in this specialization. We do not only offer free samples on any topic but help with preparing the entire work within the quickest time.

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Chromatography and Ionic versus Covalent Bonds

PART 1 15.1.3 CIA Demonstration: Chromatography After you watch the above video, answer the questions below in sufficient detail: (a) (3 pts.) This video discusses 3 different types of chromatography. List each one mentioned, and describe their differences in as much detail as possible (your points earned will be proportional …

Gaseous Diffusion Coefficient

Introduction The knowledge of physical and chemical properties of certain materials is important because very often process engineering deal with the transformation and distribution of these materials in bulk. One such property is diffusivity. Theory When a concentration gradient exists within a fluid consisting of two or more components, there …

Formal Analysis of Judith Beheading Holofernes

In Judith Beheading Holofernes, created in 1599, Michelangelo Mensi da Caravaggio uses high contrast and vivid lines to capture the dramatic essence of the beheading of Holofernes. In this rectangular oil painting done on canvas measuring 57 inches by 77 inches, the realistic view of the physical and emotional human …

Extraction: Extraction with acid and alkali

Objective 1. To recover the benzoic acid and p-dichlorobenzene from its mixture from its mixture by using acid-alkali extraction. 2. To determine the percentage recovery and melting point of the recovered benzoic acid and p-dichlorobenzene. Introduction Acid-base extraction is a process which purifying the acids and bases from mixtures based …

Responses of Enzyme Activity from pH and Concentration

Abstract Enzymes are the key to many of the chemical reactions that our bodies depend on to live. Without enzymes, we would not exist. These biological catalysts speed up the reactions as well as reduce the amount of activation energy needed to complete the process. Knowing how important enzymes are …

Colligative Properties - Freezing-Point Depression and Molar Mass

Introduction There are two types of mixtures; homogenous and heterogeneous. Homogenous mixtures have components that are uniformly mixed, while heterogeneous mixtures do not. A solution is a homogenous mixture that has two or more substances. A solution is mainly made of a solvent, while the solute is the smaller part …

The Chemistry of Life

To conduct your laboratory exercises, use the Laboratory Manual that is available in the “Content” section of the Leo classroom or at the eScience Labs Student Portal. Laboratory exercises on your CD are not be updated. On your own and without assistance, complete this Lab 2 Answer Form electronically and …

Problem solving Chemistry

Mercury, the only metal that exists as a liquid at room temperature, melts at 234.3 K. Convert this melting point to degrees Celsius. Mercury has a boiling point of 356.58°C. Convert this temperature to degrees Fahrenheit. Mercury metal is poured into a graduated cylinder that holds exactly 22.5 mL. The …

Effects of Decerebration on Toad

ABSTRACT The brain is the most important part of an organism’s body. It is the one that receives all information from different stimuli and controls the movement of body parts. But for sudden stimuli that needs a quick response, spinal cord reflexes happened. The effect of decerebration on a toad …

Solids: Recrystallization and Melting Points

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 …