Question 1 0 out of 2 points When electricity is passed through molten potassium bromide‚ two simpler substances‚ potassium and bromine‚ are produced. Therefore‚ potassium bromide Selected Answer: has less mass than the resulting potassium and bromine do. Correct Answer: cannot be an element. Question 2 2 out of 2 points Which of the following parts (postulates) of Dalton’s atomic theory has been modified in light of later discoveries? Selected
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Introduction The purpose of this project was to detect which organism we had in our unknown mixed culture tube by running a series of experiments to detect which specific Gram negative organism we had. To detect your gram positive from the mixed culture was given as extra credit points also. A Gram stain was performed and isolation streak plate in order to isolate and observe the unknown organism. Before the series of test‚ a dichotomous key had to be written up in order to know what steps
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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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Combustion of 2‚2dimethylpentane • Write the chemical formula and the balanced chemical equation for this combustion reaction. structural diagram Balanced equation Sulfur in Gasoline • Sulfur in gasoline is a pollution problem • The combustion of gasoline and therefore the combustion of sulfur produces sulfur dioxide‚ SO2(g) • Result acid rain (Acid rain NOx your SOx off!) N2(g) + O2(g)> Combustion of most nonmetals produces dioxides eg. CO2‚ NO2‚SO2‚PO2‚ exception H2O
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Environmental Biotechnology Biogeochemical Cycling The Carbon Cycle Why is carbon so important. BIOT6008 Environmental Biotechnology Lecture 3 Environmental Biotechnology Sources of Carbon The Earth’s Crust: The largest amount of carbon on Earth is stored in sedimentary rocks. Oceans: most in the form of dissolved inorganic carbon stored at great depths. A much smaller amount of carbon is located near the surface. Atmosphere: Mostly in the form of CO2. This carbon is of vital
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chemistry classes. This compound must contain at least 20% sulfur‚ at least 30% iron oxide‚ and at least 30% but no more than 45% potassium. Tarmac’s marketing department has estimated that it will need at least 600 pounds of this compound to meet the expected demand during the coming school session. Tarmac can buy three compounds to mix together to produce CHEMIX. The makeup of these compounds is shown in the following table. Compound Sulfur Iron Oxide Potassium 1 20% 60% 20% 2 40% 30% 30% 3 10%
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w w w e tr .X m eP e ap UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level .c rs om 5070/11 CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB recommended) October/November 2011 1 hour *0909424295* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and
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Using Clean Coal Technologies to Reduce Air Pollution ASDF SCI/275 September 4‚ 2011 Kristal Davis Fadtke Using Clean Coal Technologies to Reduce Air Pollution Air pollution is of pronounced concern in the media lately. Some of the effects of air pollution include the increase of carbon in the atmosphere which contributes to the global warming effect. The effects have been felt with record temperatures on the east coast and in the Midwestern United States this summer. One major contribution
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COAL -- A Fossil Fuel How Coal Was Formed How We Get Coal How Coal is Transported Types of Coal Where We Get Coal How Coal is Used Coal and the Environment energy calculator links page recent statistics HOW COAL WAS FORMED Coal is a combustible black or brownish-black sedimentary rock composed mostly of carbon and hydrocarbons. It is the most abundant fossil fuel produced in the United States. Coal is a nonrenewable energy source because it takes millions of years to create. The
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* Chemical Formulas and Reactions . . . Midterm Objectives: * To balance chemical equations. * To interpret chemical reactions. * To understand equilibrium reactions and the factors that can affect them. * Molecular Mass / Formula Mass * Is the sum of the atomic masses of all the atoms present in one molecule of that compound. Example: the molecular mass of sodium bromide‚ NaBr‚ is 103‚ which represents the sum of the atomic mass of sodium (23) plus that of bromide (80)
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