Chemical kinetics

5-CinthiaV-Selenium The name of my element is Selenium. The element symbol is “Se”. Selenium was discovered in Sweden by Jons Jacob Berzelius in 1817. Selenium is an origin for a greek word meaning moon. Selenium has four energy levels. In the first energy level, it has two electrons. The second energy level has eight electrons. The third energy level has 18 electrons. The fourth energy level has six valence electrons. Selenium has forty-five neutrons. Selenium has the…

Chemistry / Period 5 Introduction: The periodic table is a table of the chemical elements in which the elements are arranged by order of a atomic number. The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons. They are the electrons involved in chemical bonds with other elements. Every element in…

to release energy chemically to some other body parts in order for life to be sustained. In the process, ATP is actually converted to form Adenosine diphosphate ADP and a lot of heat is lost and the result is basically the production of heat and chemical energy. It is important to note that ADP can be further converted to form Adenosine Monophosphate and energy is also released. Under conditions which are actually special ATP can be hydrolyzed directly to form AMP, releasing the energy for two…

Introduction Four reactions were done using coffee cup calorimetry for each. Two Styrofoam cups were stacked together for each reaction performed, with a piece of cardboard used as lid with a hole for the thermometer. The beginning and final temperatures were taken for all reactions and solvents used. The end result and point of the experiment is to find what ΔH. Also this is a constant pressure calorimetry experiment. The goal of each of the reactions is to get ΔHrxn which is represented in…

I read the book A Tale of Seven Elements by Eric R. Scerri. This book was published on June 20 of 2013 by Oxford University Press, USA and it contains 270 pages. A Tale of Seven Elements is a non fiction chemistry book. Overall this book talks about how seven elements - protactinium, hafnium, rhenium, technetium, francium, astatine and promethium - were discovered. These elements are referred to him as infra-uranium elements. Each element has its own chapter with a description to how it was…

Beginning Question: How effectively and efficiently can biphenyl be synthesized by a Suzuki coupling reaction? Claims: Biphenyl synthesized by a Suzuki coupling reaction was effectively isolated and then characterized using TLC, melting point, IR and 1H NMR tests. However, this process was not efficient because it had a poor pure yield of 22%. Evidence: The goal of the experiment was to synthesize biphenyl product by a Microwave-assisted Suzuki reaction and this was carried out using 1…

One of the earliest metals to be discovered, lead has a long history with mankind. It was first discovered around 7000 BC as a byproduct of silver smelting. Lead is metal known for its resistance against corrosion, malleability, and low melting point. Mined all across the world, lead was one of the most important metals in ancient times. Although lead was toxic, it was used widely, particularly in the Roman Empire. Through its uses and toxicity, lead affected the classical era in a drastic way.…

and there is excess of another reactant. It is important to understand limiting reactants because it allows us to adjust the amount of chemicals we need to create a product without having excess chemicals. On October 5, 2017, we completed a lab in which we determined which chemical was the limiting reactant in a reaction by adding each chemical to the excess chemical and observing which formed a precipitate. II. Data, Results, and Evidence Procedure The procedure was downloaded from…

SaskWater has received a Request for Service from the Town of Birch Hills requesting a peak flow of 130 igpm. An assessment was performed includes two of SaskWater existing systems. Option #1 the Melfort Regional Treated System (CLPOWSS); three scenarios were considered while investigating the CLPOWSS. Scenario #1 connects the Birch Hills community with the CLPOWSS, plus twining 5.5 km of the existing pipeline between Melfort and Kinistino, which would allow for 100% of average daily…

Many chemicals are safe to handle but negatively impact the environment in the long run. Other chemicals such as arsenic are toxic even in the smallest amounts. Mercury is a natural element that occurs throughout our environment and solar system. It has unique properties (i.e liquid metal at room temperature) and can be found in very small concentrations in many rocks and is the main component of the mineral cinnabar. Natural background levels can be detected in soils, living organisms, air, and…