Zinc oxide

1. Introduction Pre-industrial revolution, humans beings used to live a primitive life whereby they used wood for cooking, warming house; as biofuel. Even later when they lived in houses, they used candles to light up their homes. Post-industrial revolution, human beings discovered new energy resources which have made life much easier to live. And the discovery of these resources (coal and oil), have also supported the advancement of new technologies e.g. automobiles, airplanes, generation of…

naturalist and naturalist philosopher. During this period there were 86 known metals.The first discovery of metals were Gold (Au) and Copper (Cu). Then four other metals were discovered. They were called Arsenic (As), Antimony( Sb),Bismuth (Bi) and Zinc (Zn).While the metals where discovered naturalists…

This is what people refer to when they talk about smog. According to the Webster dictionary, smog is “a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust” (Dictionary, 2016). Because of our atmospheric pollution, when smog is present and it begins to rain, the rain traps the chemicals and brings them down to the earth’s water…

Carbon Dioxide, is a natural occurring chemical compound that consists of one carbon atom and two oxygen atoms. On Earth carbon dioxide is released into the atmosphere from respiration, combustion of coal or hydrocarbons, and respiration. However most of the carbon dioxide that is released into the atmosphere is removed by organisms that conduct photosynthesis. Photosynthesis is the processes in which organisms, such as, plants, algae and cyanobacteria (bacteria that obtain their energy from…

As of September 2016, over 260 million Americans have consumed at least 1 bag of potato chips. This means that at least 24375 tons of chips have been eaten in the past year. However, that calculation would only be true if each bag contained at minimum its labeled amount. When opening a bag of chips, it is easy to assume that the labeled amount is false due to the amount of empty space inside. Thus, the goal of this paper is to explore this idea and document the experimentation that follows in…

constants (complex refractive index n, complex dielectric function ϵ, and reflection and absorption coefficients R and α) of materials are of great importance for optical metrology in the semiconductor industry.1,2 A high-performance complementary-metal-oxide-semiconductor process flow with 11 layers of metal requires about 75 photolayers and may contain up to 100 thickness measurements, most of them performed using spectroscopic ellipsometry.3 This technique has been described in various books…

(Tommasini et al., 1996). In cyanobacteria transport may also be necessary for cadmium resistance because it contains various types of RNA- and P-type transport systems. Ncc, a nickel exporter (Schmidt and Schlegel 1994) and RND-driven systems like Czc a zinc exporter [53-54 Nies, 1995; Nies 1989b) present in gram-negative bacteria, and involved in detoxification of…

stripped of it’s layer of zinc by using hydrochloric acid. The chemical reaction of the experiment is shown below: 2 HCl (aq) + Zn(s)----> H2 (g) + Zn2+(aq) + 2 Cl-(aq) Once the iron was free of the zinc layer, it was then weighed again for its new mass. The mass remaining is the mass of the iron present that was underneath the zinc layer. To calculate the mass of the zinc coating: mass before treatment – mass after treatment. It was possible to find the thickness of the zinc layer on each…

state by adding 3M sulfuric acid. The two H+ in sulfuric acid reacts with the O in CuO to form This solution was filtered by a vacuum to remove the sulfur. The filtrate contained Cu in an aqueous form and was transfer into a new beaker. Lastly, Zinc was added to the new beaker to reduced Cu (aq) to Cu (s). This is oxidation and reduction reaction because . This copper was recovered through vacuum filtration. After performing these reactions to recover copper, the % yield of copper.…

When copper is exposed to air it oxides, which then cause the copper to form a green/bluish pigment that surrounds the copper entirely which is also known as Verdigris. A perfectly good example of verdigris is the Statue of Liberty which was made from pure copper which then oxides over a long period of time with oxygen as well as water causing the green color. Copper is found in many appliance people use…