A slower process than MIG, it produces a more precise weld and can be used at lower amperages for thinner metal and can be used on exotic metals. TIG does require quite a bit more time than MIG to learn. It is similar in technique to gas welding. TIG can be used with pure helium or argon as an inert shielding gas to protect the weld pool from the atmosphere. (Nitrogen, hydrogen, oxygen, carbon dioxide, and other elements cause weld defects if introduced to the weld pool.)
Commodity Chain Essays: Apple Iphone 5 Part 1: Extraction One raw material that is an integral component in finished Iphone 4 product like I have here is Columbite-Tantalite or as it is commonly referred to "Coltan" is a dull black metallic ore capable of holding a high electrical charge. An ore is a type of rock that contains minerals with important elements including metals. Ores are traded internationally and comprise a large portion of the international market in raw materials, examples of well known ores with significant value are the metals Gold and Copper. In Coltan the desired minerals within the ore are Columbite, and Tantalite. Columbite is valued for being comprised of the element niobium, and Tantalite for containing the element tantalum.
Electrochemistry Homework Describe with the aid of labelled diagrams the structure and chemistry of a dry cell. Dry cells are electrochemical cells using a low-moisture electrolyte. They contain a centre of carbon rod, surrounded by an electrolyte paste and a zinc container. In the centre of most dry cells is a pure carbon rod (cathode) in the form of graphite. The carbon rod is surrounded by a layer of manganese dioxide (MnO2), and a thick paste of ammonium chloride (NH4Cl) and zinc chloride (ZnCl2), which serves as an electrolyte.
What are the identities of the substances found after electrolysis and heating? The identities of the substances found were Iodine, Iodide ion (I-), Triodide ion(I3-), Zinc metal and Zinc ion(Zn2+) Post Lab questions: 1. What did this experiment convincingly show about the composition of the white solid? I put that the experiment showed us the white substance was comprised of Zinc ions and iodide ions, and that the two ions and be separated back into their respective elements 2. During the electrolysis, a gray solid formed on the negative wire of the battery and the dark red solution formed at the positive wire of the batter.
The Element Gold (Au) Facts about the Definition of the Element Gold The Element Gold is defined as... A soft, yellow, corrosion-resistant element, the most malleable and ductile metal, occurring in veins and alluvial deposits and recovered by mining or by panning or sluicing. A good thermal and electrical conductor, gold is generally alloyed to increase its strength, and it is used as an international monetary standard, in jewelry, for decoration, and as a plated coating on a wide variety of electrical and mechanical components. The most common uses of Gold are in Currency, Coinage, Jewellery, Tableware, Dental alloys and Electronics | Interesting Facts about the Origin and Meaning of the element name Gold What are the origins of the word Gold ? The name originates from the Old English Anglo-Saxon word 'geolo' meaning yellow. The Symbol Origin is from the Latin word 'aurum' meaning gold.
Reactivity of Metals Background Information When a metal (such as magnesium, aluminium, zinc and copper) is mixed with hydrochloric acid, a hydrogen gas is produced. If hydrogen gas is produced, a pop sound should be heard when a flame is held over the substance. On the periodic table the most highly reactive elements are in the first group and the least reactive are in the last group. All metals have the same properties, they are shiny, they conduct heat and electricity, they are malleable which means able to change shape permanently without breaking or cracking, and they are also ductile which means they are able to be deformed without losing their strength. Aim To compare the reactivity of various metals by observing their reaction with hydrochloric acid Hypothesis That the all the metals will produce foam and a pop.
Erjona Peci June 14th, 2015 Chemistry Lab 106 Section 9 Professor Halilovic The Castle of Quantification Lab Report * Observations of the Materials Used Material | Observations | Granular Zinc | Small Grainy like MetalSilver/Grey like color | Iodine Crystals | Small, spherical solidDark grey and smooth | Acidified Water | Liquid, a little murky but clear | Boiling Chip | Small and a solidWhite | * Procedure Steps | Observations | 1. Weigh the “R” labeled boiling tube. The “R” stands for reactants. Do the same for the Boiling tube labeled “P”, which stands for products. The “P” boiling tube contains one boiling chip as well.
Erjona Peci June 14th, 2015 Chemistry Lab 106 Section 9 Professor Halilovic The Castle of Quantification Lab Report * Observations of the Materials Used Material | Observations | Granular Zinc | Small Grainy like MetalSilver/Grey like color | Iodine Crystals | Small, spherical solidDark grey and smooth | Acidified Water | Liquid, a little murky but clear | Boiling Chip | Small and a solidWhite | * Procedure Steps | Observations | 1. Weigh the “R” labeled boiling tube. The “R” stands for reactants. Do the same for the Boiling tube labeled “P”, which stands for products. The “P” boiling tube contains one boiling chip as well.
Experiment 9 – Decomposition of Baking Soda Introduction The decomposition of any metal hydrogen carbonate will result in the formation of that metal carbonate, water vapor, and carbon dioxide. This lab will investigate the decomposition of sodium hydrogen carbonate, NaHCO3, commonly called baking soda. It is governed by the following chemical equation: 2 NaHCO3sNa2CO3s+ H2O g+ CO2 (g) In this lab, the NaHCO3 will be decomposed to form Na2CO3. The first half of the experiment will use a pure sample of NaHCO3, and the second part will use a mixture containing only some NaHCO3. Depending on how well the first half of the experiment is performed, the percent yield of this reaction should be 100%.
The atomic bomb works by a physical phenomenon known as Fission. In this case, particles, specifically nuclei, are split and great amounts of energy are released. This energy is expelled explosively and violently in the atomic bomb. The massive power behind the reaction in an atomic bomb arises from the forces that hold the atom together called the strong nuclear force. The element used in atomic bombs is Uranium-235.