Carbonate Mass of Crucible (g) Mass of CuCo3 added (g) Mass of Crucible + Copper Oxide (g) Mass of CuO produced (g) 0.00 0.25 0.50 0.75 1.00 1.25 What happens to the mass of the copper carbonate when it is heated? Give a conclusion‚ which describes why the mass of copper carbonate may have changed during your experiment. When the copper carbonate is heated it decomposes forming copper oxide and carbon dioxide. The copper carbonate turns into a bright red while it is being
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elements of Group 2 include beryllium‚ magnesium‚ calcium‚ strontium‚ barium and radium. These elements with the exception of beryllium are commonly known as the alkaline earth metals. These are so called because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust*. Among the alkali metals sodium and potassium are abundant and lithium‚ rubidium and caesium have much lower abundances (Table 10.1). Francium is highly 223 radioactive; its longest-lived
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Centre Number Surname Other Names Candidate Signature Candidate Number For Examiner’s Use Examiner’s Initials Question Mark General Certificate of Secondary Education Foundation Tier June 2011 1 2 3 4 5 6 7 TOTAL Additional Science Unit Chemistry C2 CHY2F Chemistry Unit Chemistry C2 Wednesday 25 May 2011 For this paper you must have: the Data Sheet (enclosed). You may use a calculator. F 9.00 am to 9.45 am Time allowed 45 minutes Instructions Use
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and nitrogen) CARBON DIOXIDE + water + unaffected nitrogen Typical Engine Combustion FUEL + AIR UNBURNED HYDROCARBONS + NITROGEN OXIDES + CARBON MONOXIDE + CARBON DIOXIDE + water Exhaust Pollutants • HYDROCARBONS Hydrocarbon emissions result when fuel molecules in the engine do not burn or burn only partially. Hydrocarbons react in the presence of nitrogen oxides and sunlight to form ground-level ozone‚ a major component of smog. Ozone irritates the eyes‚ damages the lungs‚ and aggravates respiratory
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Anderson Kuo Period 1 CHAPTER 19 – The Representative Elements: Groups 1A through 4A -19.1- A Survey of the Representative Elements I. Elements A. Representative Elements: Groups 1A through 8A ← Filling s and p orbitals ← First member of a group forms the strongest ( bonds; results in diatomic molecules B. Transition Elements: center of the table ← Filling d orbitals C. Lanthanides & Actinides: listed separately‚ on the bottom on the table ← Filling
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greenhouse effect. II. The greenhouse gas emissions come mostly from energy use. A. There are 6 primary greenhouse gases. 1. Water Vapor is one of the greenhouse gases. 2. Carbon Dioxide is one of the greenhouse gases. 3. Nitrous Oxide is one of the greenhouse gases. 4. Ozone is one of the greenhouse gases. 5. Methane is one of the greenhouse gases. 6. Chlorofluorocarbon is one of the greenhouse gases. B. There are 6 principal pollutants that contribute to the formation
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monoxide‚ oxides of nitrogen‚ hydrocarbons and particulates which cause great harm to people who breath them and pollutes environment. And also they react with environmental gases to create further toxic gases (Secondary
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reacts very slowly with the oxygen‚ O‚ in the air. However‚ as magnesium is heated‚ it reacts quicker with the oxygen and burns with a white light to produce MgO. To protect others from the smoke‚ containing Magnesium Oxide‚ the crucible had to remain covered. Some magnesium oxide escaped‚ when the crucible was not covered. The crucible had to be slightly ajar when heating up the magnesium‚ so that oxygen could get to the reaction. Without oxygen‚ a fire cannot exist. The shininess of the metal
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Air Pollution in Hong Kong Chemistry Project the Written Report 1.Introduction 3 2.Sources of Air Pollution 3 - 7 1.Vehicles 4 - 5 1. Pollutants produced by vehicles 4 2. Reasons why pollutants are produced 4 3. Impacts of the pollutants from vehicles 4 - 5 4. Method to eliminate pollutants 5 2.Power Stations 6 - 7 1. Pollutants produced by power stations 6 2. Reasons why pollutants are produced 6 3. Impacts of the pollutants from power stations 6 4. Methods to eliminate
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Chemistry Practical: Activity Series of Metals Introduction: The chemical activity of a metal is directly related to its practical use. In this investigation you will investigate the chemical activity of metals with oxygen‚ water‚ acid and alkali‚ to rank metals in order of their activity. Aim: To observe the reactivity of metals in order to determine the activity series of metals. Risk Assessment: In this investigation‚ hydrochloric acid solution is used which is toxic by all routes of
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