Essays Tagged: "Copper"


ups. The majorelements such as calcium, magnesium, iron, iodine etc. Thenthe trace elements such as copper, manganese fluorine andzinc.Once of the most important is calcium. Calcium is used tobuild up ...

(1 pages) 53 0 4.0 Oct/1996

Subjects: Science Essays > Biology

Differences and Effects of Natural and Synthetic Fertilizers

ll the other elements and compounds required for sufficient growth, such as iron, boron, manganese, copper, zinc, molybdenum and chlorine. In some cases, these nutrients are found to be missing in soi ...

(3 pages) 48 0 5.0 Jan/1996

Subjects: Science Essays > Biology


es.CONDUCTIVITYConductivity is the ability of a substance to carry electricity. Somesubstances like copper, aluminium, silver and gold do it very well. They arecalled conductors. Others conduct electr ... velop composite wires. This means that thesuperconducting material would be covered by a coating of copper. If theceramic loses its superconductivity, the copper would take over until thesuperconducto ...

(6 pages) 72 0 3.4 Mar/1997

Subjects: Science Essays > Physics

Sequence of Chemical Reactions

artnerInstructor YangFebruary 11, 1997INTRODUCTIONThis experiment was to recover the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form, but ... ill turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process, however, some of the Cu+2 ions may be lost. The copper will ...

(2 pages) 39 0 4.4 Feb/1997

Subjects: Science Essays > Chemistry

The Congo: Anguish at The Hands of Leopold

ese, and provoked unsurpassed civil conflict. The Congo has always been a leading source of cobalt, copper, ivory, rubber, and other natural resources; Leopold recognised this and desired the riches t ...

(11 pages) 134 1 4.8 Dec/2003

Subjects: History Term Papers > World History

What made the English settlers who came to the New World (America) make the transition from Englishmen abroad to Americans, and what made them come together in the end for a Revolution?

ent began by increasing their control over colonial affairs. Parliament added articles such as fur, copper, hemp, tar and turpentine to the list of items produced in the colonies that had to be shippe ...

(3 pages) 40 1 5.0 Dec/2003

Subjects: History Term Papers > North American History

Resitances of a wire:it is about how length effects the resistance of a wire.

wire to use for my experiment. I tested two wires that are frequently used in electronic circuits, copper and in-home. We tested an equal length of each wire to determine a range of voltages that cou ... used for the experiment before the wire got hot (a rise in temperature would increase resistance). Copper started to warm up at around 0.50 volts and nichrome at about 2.00 volts. I will use nichrome ...

(3 pages) 118 1 4.5 Dec/2003

Subjects: Science Essays > Physics

THis is a general report on copper. It describes it's physical properties, chemical properties, and its uses.

Copper, also known as Cu, is one of the oldest elements. It's discovery dates back to prehistoric ti ... y dates back to prehistoric times in 9000BC. Signs of its uses were found in Iraq and North Africa. Copper has an atomic weight of 63.546 and its atomic number is 29. Its melting point is 1084.62 ° ... point is 1084.62 °C and 1984.32 °F while its boiling point is 2927 °C and 5301 °F. Copper's density is 8920 kg per cubic m..Copper is one of the most important metals, it is a reddish ...

(2 pages) 44 2 4.9 Feb/2004

Subjects: Science Essays > Chemistry

A Brief History of the Periodic Table

dic table were made in antiquity, with the discovery of obvious elements such as gold, silver, tin, copper, lead and mercury. In 1649, the first scientific discovery of an element occurred in 1649 whe ...

(3 pages) 48 0 4.8 Apr/2004

Subjects: Science Essays > Chemistry

Lab Repot of Decomposition Reaction Between Iron and Copper (II) Chloride

IntroductionWhen iron is mixed to Copper (Ⅱ) Chloride; the product will be copper and iron chloride. However, in this experiment ... ch element in the equation. Then we can compare the ratio between the mole and the mass of iron and copper; that will be measured during the experiment. Finally because of the balanced equation the ra ... e (Ш) + 3CuCl2 (aq) → 3Cu + 2FeCl2In addition, we will need to find the percent yield of copper. Percent yield is a measure of the mass of what was produced ("experimental yield") divided b ...

(3 pages) 34 0 4.2 Apr/2004

Subjects: Science Essays > Chemistry

Types of hemical reactions - Practical Report-(Refer to word document for subscripts,tables and correct characters.)

tests and observations.Decomposition of a carbonate by heatingApparatus:SpatulaBunsenTest tube (x2)Copper (II) carbonateStopper and delivery tubeLimewaterProcedure:1. Place a spatular of Copper (II) ... ery tube leading into another test tube, filled with limewater.3. Heat the test tube containing the Copper (II) carbonate and observe any changes that take place to it or the limewater.Results/observa ...

(7 pages) 40 0 1.0 Jun/2004

Subjects: Science Essays > Chemistry

Etching -- Printing of the Seventeenth Century

pursue this medium. His study of the art led to discoveries of developing hard, smooth surfaces for copper plates as well as creating very precise lines with etching needles. His detail and vivid draw ...

(1 pages) 27 0 3.0 Jun/2004

Subjects: Art Essays

Quantitative preparation of a salt and yield calculation.

Introduction:Copper(II) sulphate can easily be prepared by reacting copper(II) oxide with dilute sulphuric acid. ... phate can easily be prepared by reacting copper(II) oxide with dilute sulphuric acid. The resulting copper(II) sulphate solution when cooled can easily crystallize, so the amount of the product can be ... result can then be compared to the theoretical amount to give a % of the yield calculated. The then Copper(II) sulphate crystals are CuSO4.5H2O.Hypothesis:It is my opinion that the results we will rec ...

(3 pages) 28 0 4.0 Sep/2004

Subjects: Science Essays > Chemistry

IB Chemistry: Grade 12: Practical 1: Stoichiometry Quantitative Preparation of a Salt and Yield Calculation

Quantitative preparation of a salt and yield calculationIntroduction:Copper (II) sulphate can be prepared by reacting copper (II) oxide with dilute sulphuric acid. The r ... I) sulphate can be prepared by reacting copper (II) oxide with dilute sulphuric acid. The resulting copper (II) sulphate solution can then be crystallized, so that a quantitative analysis may be made ... the product formed. This can then be compared with the theoretical amount, and % yield calculated. Copper (II) sulphate crystals are CuSO4.5H2O. Therefore, the reaction is:CuO + H2SO4 + 4H2O ® Cu ...

(2 pages) 32 1 3.7 Sep/2004

Subjects: Science Essays > Chemistry

Sources of slow growth in African countries

African countries. The dependency on one major export crop like tobacco in Zimbabwe, tea in Kenya, copper in Zambia and cocoa in Ghana leaves the country's export potential vulnerable due to changes ... anges in the world market for the respective products. The fall or decline in the export prices for copper in Zambia in the early 1990s left the country facing massive balance of payments short falls, ...

(8 pages) 101 1 3.7 Sep/2004

Subjects: Social Science Essays > Economics > Development Studies

Digital Subscriber Line technologies

with high data transmission speeds with high levels of bandwidths all over the medium of the simple copper telephone wire. DSL and the development of various types of DSL has become an essential part ... s users a fast internet connection as compared to modem dial up. DSL uses the medium of the twisted copper pair wires from the telephone to receive and transmit data without having to tie up the house ...

(13 pages) 55 0 3.0 Oct/2004

Subjects: Science Essays > Computer Science


Milk ice cubes Stopwatch Hot Water Procedure: The copper cup was weighed and its mass was then recorded. The kettle was then used to boil water and th ... s mass was then recorded. The kettle was then used to boil water and this water was poured into the copper cup. The mass of the cup plus the hot water was calculated and recorded. The copper cup was t ...

(4 pages) 23 0 3.0 May/2005

Subjects: Science Essays > Physics

Civilizations of the fertlile Crescent

h. Sumerians are credited with many inventions such as the wagon wheel and plow, casting objects in copper and bronze, and created a system of writing although writing was also being developed in Egyp ...

(4 pages) 37 0 3.0 May/2005

Subjects: History Term Papers > Middle Eastern History

Experiment on the Decomposition of a Carbonate

re stable at the highest temperature of a Bunsen burner flame, whereas the carbonates of silver and copper are easily decomposed. In this experiment copper (ii) carbonate will be decomposed at a high ... omposed. In this experiment copper (ii) carbonate will be decomposed at a high temperature, forming copper (ii) oxide and carbon dioxide:CuCO3(s) arrow CuO(s) + CO2(g)You will test for the formation o ...

(2 pages) 17 0 0.0 Mar/2006

Subjects: Science Essays > Chemistry


and back and during the early civilization period included the use of bronze for tools and weapons. Copper had introduced earlier, but mixing it with tin for bronze created much stronger equipment. Th ...

(1 pages) 23 1 4.0 Oct/2006

Subjects: History Term Papers > Middle Eastern History