Introduction: The presence of greenhouse gases in the Earth’s atmosphere last year reached its highest levels since pre-industrial times‚ a report released by the United Nations World Meteorological Organization (WMO) warns recently. Even if we managed to halt our greenhouse gas emissions today‚ and this is far from the case‚ they would continue to linger in the atmosphere for decades to come and so continue to affect the delicate balance of our living planet and our climate. The latest
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EXTRACTION OF METALS SUMMARY Most metals exist in compounds in rocks in the Earth’s crust. Many of these ores contain oxides or sulphides of the metals. The compounds need to be reduced to produce the metals as elements. Metals are very useful to us because of their special properties. Reduction means removal of oxygen or gain of electrons. Carbon is a good chemical reducing agent because it readily combines with oxygen‚ but it is only useful for the metals below it in the Reactivity
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Student: Mary Chrisin L. ObreroDate: October 7‚ 2014 Section: 116 Behavior of Gases and Determination of Absolute Zero Experiments 4&5 Introduction: First of all‚ the Boyle’s law (pressure-volume law) indicates that the volume of a certain amount of gas given held at a constant temperature differentiates inversely with the applied pressure when there are constant temperature and mass. Equations: PV=C. When pressure goes up‚ volume goes down (derived from the equation above): P1V1 = P2V2 =
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Heather Schnicker 26 October 2012 Experiment # 4 (Lab 3) Properties of Gases PURPOSE The purpose of this experiment was to investigate and identify the chemical properties of the gases tested. DATA Gas | FLAME REACTION | GLOWING SPLINT | LIMEWATER REACTION | BROMOTHYMOL BLUE REACTION | Hydrogen | NO REACTION | | | | Oxygen | | BURNED BRIGHTER | | | Hydrogen & Oxygen | QUICK FLAME BURST | | | | Carbon Dioxide | | PUT THE FIRE OUT | NO REACTION | TURNED
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What are Greenhouse Gases? These are the gases that make up our atmosphere: Carbon Dioxide 89% Methane 7% Nitrous Oxide 3% Halocarbons 1% What is the Greenhouse Effect? The Greenhouse Effect is the way that gases in the atmosphere trap heat from the sun. They let heat in‚ but prevent most of it from escaping. It is essential for life because we need a certain amount of radiation to heat up our atmosphere. What human activities produce Greenhouse Gases? By burning fossil fuels such as coal‚ oil and
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ALKALINE EARTH METALS what are alkaline earth metals? Alkaline earth metals are elements that are in the second group of the periodic table. the elements have two electrons on the outermost shell. the elements include Beryllium‚ magnesseum‚ calcium‚strontium‚ barium and Radium.The alkaline earth metals are all silvercolored and soft‚ and have relatively low densities‚ melting points‚ and boiling points. In chemical terms‚ all of the alkaline metals react with the halogens to form the alkaline earth metal halides
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ComMon Acids and Alkalis 10.1 Acids and Alkalis 1. Acids taste sour. Many fruits contain acids. 2. The three mineral acids commonly found in the laboratory are hydrochloric acid‚ sulphuric acid and nitric acid. 3. Alkalis taste bitter and feel soapy or slippery. 4. The common alkalis found in the laboratory are sodium hydroxide solution‚ potassium hydroxide solution‚ calcium hydroxide solution and ammonia solution. 10.2 Acid-Alkali Indicators 1. An acid-alkali indicator shows
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Laboratory# 26 Group 2: The Alkaline Earth Metals Period E Bautista‚ Angel Table D Comer‚ Tyler 3/22/12 Sullivan‚ Brittany Truong‚ Phuoc Conclusions and Questions 1. Step 1: Ca(s) +H2O->Ca (OH)2(aq)+H2(g) Step 4: Mg(s) +H2O->Mg (OH)2(aq)+H2(g) Step 10: CaSO4 + H2O-> Ca(OH)2 + H2SO4 MgSO4 + H2O ->Mg (OH)2 + H2SO4 Barium Sulfate: No reaction Step 13: MgCl2 + Na2CO3 -> MgCO3 + 2NaCl CaCl2 + Na2CO3 -> CaCO3 + 2NaCl
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Poisonous gases changed the experiences of the people in the war for the worse. Breaking on impact‚ the canisters released yellowish green fumes that wafted slowly toward the French and African troops near the Belgian town of Ypres. As the fumes reached the Allied forces‚ soldiers realized the cloud was poisonous chlorine gas. Quoted in Dooly’s Great Weapons of World War I‚ one French doctor at Ypres expressed his horror: “I had the impression that was looking through green glasses. At the same time
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In The Tragedy of Julius Caesar‚ by William Shakespeare‚ Brutus is the tragic hero for many reasons. Brutus’ character is noble‚ loyal‚ and honest. In the play Brutus is forced to make a difficult choice between killing Caesar‚ the ruler of Rome‚ to save Rome or to stay loyal to Caesar and let him live. Even when he stabs Caesar he is noble because he was doing it for the citizens of Rome. One of the reasons that Brutus is a tragic hero‚ is that he is very hesitant about killing Caesar. He has
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