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Sunday, March 24

Friday, January 11

Saturday, February 18

  1. page 26 Janvier edited ... {dot.jpg} Cai Sheng Hao (02) 2o1 Carbon (C) + Oxygen (O) → Carbon Monoxide (CO) Carbon mo…
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    {dot.jpg}
    Cai Sheng Hao (02) 2o1
    Carbon (C) + Oxygen (O) → Carbon Monoxide (CO)
    Carbon monoxide is a colourless, odourless and tasteless gas. 2 harmless elements, Carbon (C) and Oxygen (O) combine (covalent bonding) to form the highly toxic Carbon Monoxide, which causes harm to the human body when inhaled.
    Carbon monoxide inhibits the blood's ability to carry oxygen to body tissues including vital organs such as the heart and brain
    When CO is inhaled, it combines with the oxygen carrying hemoglobin of the blood to form carboxyhemoglobin (COHb).
    Once combined with the hemoglobin, that hemoglobin is no longer available for transporting oxygen.
    Carbon monoxide consists of one carbon atom and one oxygen atom, connected by covalent bonding.
    {co.JPG}
    Royce Chan 2O104

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  2. file co.JPG uploaded

Friday, February 17

  1. page 26 Janvier edited ... Key: cross = electron of nitrogen Circle = electron of oxygen Carbon Monoxide Jeremy Lee (1…
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    Key: cross = electron of nitrogen
    Circle = electron of oxygen
    Carbon Monoxide Jeremy Lee (16) 2O1
    A harmful chemical which I have found is carbon monoxide. Carbon + Oxygen = Carbon Monoxide (CO).
    Carbon monoxide is an odourless and colourless gas which is produced by burning. Examples of carbon-monoxide-producing devices are the gas stove and water heaters. As carbon monoxide is colourless and odourless, it is one of the most common types of air poisoning in various countries. One of its elements, carbon, can be found naturally as diamonds and carbon can also be made into pencil lead. As such, it is a useful to Man. The other element, oxygen, is needed for the survival of all living things. Without oxygen, living things cannot survive.
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Tuesday, February 14

  1. page 26 Janvier edited ... State: Gas Nitrogen dioxide is toxic by inhalation! Fuming nitric acid is a potential source …
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    State: Gas
    Nitrogen dioxide is toxic by inhalation! Fuming nitric acid is a potential source of exposure to the gas. A low dose of the gas is already potentially fatal. Symptoms of impaired gas exchange, and anaesthesia of the nose are signs of inhalation.
    Nitrogen oxidedioxide is also
    Nitrogen dioxide is a major pollutant, and contributes greatly to acid rain.
    There is a link between nitrogen dioxide and Sudden Infant Death Syndrome.
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Friday, February 10

  1. page 26 Janvier edited ... Done by Ryan Koh(14) 2O1 The harmful compound is methane(CH4). Methane is a greenhouse gas, a…
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    Done by Ryan Koh(14) 2O1
    The harmful compound is methane(CH4). Methane is a greenhouse gas, and is rather dangerous and poisonous. It is colourless, odorless and it is also released during decomposition or passing of gas in humans.:P Methane is a compound made up of carbon and four hydrogen atoms, and is rather flammable and explosive. It also might cause suffocation during inhalation of the gas. The constituent elements, namely carbon and hydrogen, are rather common and harmless in our lives. The bonding is illustrated below:
    {Photo_7-2-12_10_46_26_PM.jpg}{Methane(NH4).jpg}
    Sulfur Dioxide
    by Toh Wei Xiong(31) 2O1
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    7:18 am
  2. page 26 Janvier edited ... Nitrogen + Oxygen NO2 can irritate the lungs and lower resistance to respiratory infection. N…
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    Nitrogen + Oxygen
    NO2 can irritate the lungs and lower resistance to respiratory infection. NO2 chemically transforms into nitric acid and, when deposited, contributes to lake acidification. NO2, when chemically transformed to nitric acid, can corrode metals, fade fabrics and degrade rubber. It can damage trees and crops.
    Sulfur Dioxide
    Sulfur dioxide is a chemical compound with the formula SO2 and it is a poisonous gas released by volcanoes and various industrial processes.
    It is a noticeable component in the atmosphere, especially following volcanic eruptions.
    Sulfur dioxide is a major air pollutant and has significant impacts upon human health. In addition the concentration of sulfur dioxide in the atmosphere can influence the habitat suitability for plant communities as well as animal life. They may also cause acid rain, which kills plant life.
    {dot.jpg}
    Cai Sheng Hao (02) 2o1

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    6:49 am
  3. file dot.jpg uploaded
    6:48 am

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