'Very reactive' diaporamas de présentation

Introduction to Photochemical Smog Chemistry

Introduction to Photochemical Smog Chemistry. Basic Reactions that form O 3 Distinguish between O 3 formation in the troposphere and stratosphere How hydrocarbons and aldehydes participate in the formation of smog ozone Formation of free radicals Nitrogen loss mechanisms

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Chemical Bonding

Chemical Bonding. Chem I: Chapters 4, 5, 9 Chem IH: 7, 8, 9. Unit Objectives. To be able to: Explain why some elements react (form bonds.) Explain the difference between an ionic & a covalent bond. Demonstrate e- reconfiguration when a simple compound is formed.

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WOUND CLOSED MATERIALS. ????? ?????? 220074586 ????? ????? 220080809 ???? ???? 220081698 ????? ??? ???? 20083828. What is suture???. Suture: as a verb is the act of sewing by bringing tissue together Suture as a noun is a material used to bring tissue together. The Ideal Suture Material.

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Formation of glycols with Syn Addition

Formation of glycols with Syn Addition. Osmium tetroxide. Syn addition. also. KMnO 4. Anti glycols. Using a peracid, RCO 3 H, to form an epoxide which is opened by aq. acid. epoxide. The protonated epoxide is analagous to the cyclic bromonium ion. Peracid: for example, perbenzoic acid.

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22.4 Measures of Amine Basicity

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Ecology

Ecology. The scientific study of the relationships among living organisms and the interaction they have with the environment. Part 1: Organisms and Their Relationships Part 2: Flow of Energy in an Ecosystem Part 3: Cycling of Matter. Day 1. Organisms and Their Relationships.

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Bacterial Growth

Bacterial Growth. Industrial Microbiology. Bacterial growth. Binary fission Generation time Phases of growth. Binary fission. Prokaryote cells grow by increasing in cell number (as opposed to increasing in size). Replication is by binary fission, the splitting of one cell into two

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Chapter 12 Alcohols from Carbonyl Compounds: Oxidation-Reduction and Organometallic Compounds

Chapter 12 Alcohols from Carbonyl Compounds: Oxidation-Reduction and Organometallic Compounds. Introduction Several functional groups contain the carbonyl group Carbonyl groups can be converted into alcohols by various reactions Structure of the Carbonyl Group

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Pulping and Bleaching PSE 476/Chem E 471

Pulping and Bleaching PSE 476/Chem E 471. Lecture #19 Oxygen Bleaching and NaOH extraction. Agenda. Process Overview Advantages/Disadvantages Reduction of Oxygen: Oxygen species Lignin Reactions Carbohydrate Reactions Effect of Process Variables NaOH extraction.

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Understanding the Periodic Table: GROUPS

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The Periodic Table

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T he Ozone Hole

T he Ozone Hole. Ange Darnell. Ozone. Ozone is a relatively unstable molecule made up of three oxygen atoms. The majority of this compound exists in the stratosphere (15 miles up) and shields the Earth from harmful UV radiation from the sun. Source: University of Alaska.

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4.5 Physical Properties in Giant Covalent Substances

4.5 Physical Properties in Giant Covalent Substances. Diamond. Structure: Giant covalent macromolecule Bonding: Each carbon atom has 4 bonding pairs of electrons and 0 lone pairs of electrons. According to VSEPR

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The Periodic Table

The Periodic Table. Elements and the Periodic Table. ? The Periodic Table is an organized chart of all of the elements in the entire universe For example: ? Iron (Fe) is an element that is found on Earth. The Iron on earth is identical to the iron atoms found on meteorites. &

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Atoms, Molecules and Ions

Atoms, Molecules and Ions. Atomic Theory of Matter. John Dalton. 1806. 1. Matter consists of indivisible atoms. All atoms of a given element have identical properties. Different elements have atoms that differ in mass. 4. Atoms are indestructible and chemical

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Pulping and Bleaching PSE 476/Chem E 471

Pulping and Bleaching PSE 476/Chem E 471. Lecture #20 Bleaching: Ozone and H 2 O 2. Ozone/Hydrogen Peroxide Bleaching: Agenda. Ozone Advantages/Disadvantages Lignin & Carbohydrate Reactions Effect of Process Variables Hydrogen Peroxide Advantages/Disadvantages

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Silica Fume and Fly ash

5 minute Flash. Silica Fume and Fly ash. Mohamed Wagih BU Manager Contractors Sika Qatar. Flash Agenda :. Definition . Specification Standards. Chemical and physical Characteristics. Advantage and Disadvantage of Fly Ash in Fresh and hardened concrete.

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ORGANIC CHEMISTRY

ORGANIC CHEMISTRY Many molecules important to living organisms some are quite small----> water many important ones are very large ----> macromolecules 4 major types found in living organisms : carbohydrates lipids proteins nucleic acids

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CHEMISTRY DEPARTMENT WAID ACADEMY

CHEMISTRY DEPARTMENT WAID ACADEMY. Standard Grade Topic 3. 15. Which of the elements shown is a liquid at room temperature?. Silicon. Bromine. Oxygen. Magnesium. 20. Which of the elements shown is not naturally occurring?. Astatine. Antimony. Rubidium. Gallium. 15.

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WHERE DOES GASOLINE COME FROM?

WHERE DOES GASOLINE COME FROM?. WHY IS THERE A FLAME BURNING AT OIL REFINERIES?. Questions for ME, Mr. Asheim. Were does Gasoline Come from?. Gasoline is one of the products that can be taken out of Crude Oil, a dark homogeneous substance that is found under the ground.

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