Zinc oxide

Background Brass is considered an alloy, or a mix of multiple metals. Brass is usually made of copper and zinc, but there could be some other metals creating 300+ known brass alloys. The amount of copper in brass will affect basic characteristics of brass like color, strength, conductivity, etc. To find the amount of copper in brass one can use visible spectroscopy. Spectroscopy is the study of electromagnetic radiation. It originated as a study of visible light, and wavelength through a prism

Variables: * Independent Variable – Potato * Dependent Variables – Clock, connection wires, copper and zinc plates Materials Needed: * Digital Clock with 2 Wires * 6.25” Connecting Wire * Transparent Tape * 2 4” Copper Strips * 2 4” Zinc Strips * 2 Potatoes (Oranges worked too) Background: How it works * A potato can be used as a battery by using strips of zinc and copper in the

Introduction Different metals have different mass and volumes. The mass and volume of something effect the density of the metal. If pennies made before and after 1982 have different densities, they are most likely made out of different metals. The independent variable is the year the pennies were made. The dependent variables are the density, volume and mass of the pennies. The controlled variables are the number of pennies, the instruments used for measurement and the environment in which the pennies

When you heat up the zinc, and then coat the penny in it, it then galvanizes the penny. Meaning, it helps protect the penny from oxygen and water. Afterwards, you will need to record data such as the mass of the penny. This helps keep track of what physical traits are being changed during this experiment. On part B of this experiment, you will be heating up the now galvanized pennies in order to see what reaction you get. The reaction you should receive from heating up the now zinc-covered pennies is

1. Ancestry Discovered in approximately 3000 BC, silver is one of the oldest elements known to man. Why was it so easy for miners in Turkey and Greece to discover, one may ask? Silver is also one of the most abundant elements found on earth and was not difficult to come across when mining mountains and rocks. (Silver, 1) The exploration of silver mines in Laurium, Greece is significantly responsible for the rise of Athens in 600 BC. Additionally, in medieval times, German mines became the main source

three most common forms of coatings are barrier coatings, sacrificial coatings and _________. A sacrificial coating commonly used on marine structures is the zinc based primer, also known as the process of ‘hot dip galvanization’. Galvanization is the process in which a metal, being steel in this scenario, is coated with a thin layer of molten zinc. If coatings do not penetrate or adhere to the surface well, water can permeate through the coating and cause displacement, further causing corrosion. Factors

Copper does not decompose in the environment, and because of this it can accumulate in plants and animals are in the soil. Because of the serious impact on plants that Cu metal is a serious threat to agricultural land, depending on the acidity of the soil and the presence of organic matter. When farmland soil polluted with copper, animals will absorb concentrations that are harmful to their health. Mainly sheep suffer a great deal from copper poisoning, because the effects of Cu are shown at fairly

The process of extraction of copper varies depending of what ore, copper is being extracted from. Chalcopyrite (CuFeS2) is a sulphide ore and it is one the most common ores of copper. The process of extracting copper from chalcopyrite is a quite complex procedure in which both physical and chemical processes are involved. As chalcopyrite is around 0.5% copper and 99.5% “unwanted rocky material”, the first step to extract copper from chalcopyrite is to increase the concentration of copper in the

39). This fungus adapted well with all zinc concentrations, despite that the growth less than control but this rate was almost stable in different zinc concentrations (Table 35, Fig. 39). The fungus sporulation increased gradually with increasing zinc concentrations in the culture media and higher than that of control culture (Figs. 40,

and enriched cereals and rice would also help add copper to diet. Absorption of copper occurs in its ionic form in the small intestine and, to a limited extent, in the stomach. However, intestinal absorption of copper limited by other metal ions like zinc and cademium, and sulfide ions19,20. The presence of some amino acids and ascorbic acid in the intestine also lower the absorption of copper21,22. Absorbed copper carried in the blood by different transport proteins such as ceruloplasmin, albumin