C1 Revision Notes Atmosphere is a mixture of gases that surrounds the Earth. The three main chemical components present in air are Nitrogen‚ Oxygen and Carbon Dioxide. Trace amounts means only a very tiny concentration of gas is present. An element is made up of 1 type of atom. A compound is made up of 2 or more types of atom that are chemically bonded. A mixture also contains more than 2 or more type of atoms but they cannot be chemically bonded. A pollutant is a waste matter that contaminates
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they have to face is receiving oxygen‚ which for most organisms is mostly important to their lives. The intertidal organisms use gills‚ and these gills also have the chance of drying out from the hot sun. These organisms also discovered a way to protect themselves from drying their gills‚ what they do is close off themselves and keep their neutral activities to a minimum level until the tide returns. Some other organisms have a type of lung that lets them get oxygen when they are out of the water
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actual chemical reactions that take place in the explosions require the use of oxidisers‚ reducing agents and binders. The additions of varying metal chlorides add the colours. An oxidizing agent producing the oxygen required to burn the mixture. An agent e.g. Sulphur‚ that burn the oxygen and produce hot gases. Binders are required to hold the mixture in a lump. The ability of producing coloured light from the principles of fireworks have allowed this technology to be used for both industrial and
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photosynthesis are essentially the same process in reverse. During photosynthesis CO2 and H2O are converted to glucose and oxygen‚ while cellular respiration uses glucose and oxygen which are converted to CO2 and H20. Plants utilize molecules of chlorophyll which harness energy from the sun. That energy is used to break the bonds in water molecules producing hydrogen and expelling oxygen as a byproduct. Atmospheric C02 is absorbed by the plant through its pores‚ and is then combined with the hydrogen
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activity that is poisonous to cells. Catalase speeds up the decomposition of hydrogen peroxide into harmless water and oxygen gas. The purpose of this lab was to determine whether an inhibitor affects the rate of activity for the enzyme catalase. Since catalase speeds up the production of oxygen gas‚ the rate of enzyme activity can be measured as the height of the column of oxygen gas bubbles produced in a test tube. If copper sulfate inhibits the action of catalase‚ then it will slow down the reaction
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the respiratory system and the cardiovascular system and how they work in the metabolism of energy in the body. The respiratory system The respiration system is the process of supplying oxygen to the cells so that cells can metabolise energy. The main functions of the respiratory system are to maintain oxygen supply to cells‚ to remove water from the body‚ and to remove carbon dioxide from the body. It is divided into four sections‚ three of which are under the ‘external respiration’. These are
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rubber stopper with water thoroughly. I then began the oxygen portion of the experiment where I placed some Mn into a test tube. I added some hydrogen peroxide and filled to nearly the top. I placed the rubber stopper with gas delivery system and put into the well plate in a straight postion. I filled the pipet with water and once again inverted it and placed in on top of the gas delivery system. I then watched as it became displaced with oxygen and removed it placed my thumb over it so it wouldn’t
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consisting of three oxygen atoms. It is an allotrope of oxygen. Ozone is formed when oxygen molecules after absorbing ultra violet photon then converts a single O2 into two atomic oxygen radicals. The atomic radicals then combine with separate O2 molecules to create two O3 molecules. The main function of the ozone layer is to absorb harmful ultraviolet radiation. These ozone molecules absorb UV light‚ following which ozone splits into a molecule of O2 and an oxygen atom. The oxygen atom then joins up
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A variable portion of the oxygen produced from each leaf disc was floating to the surface instead of staying attached to the leaf disc it was produced from. If the oxygen produced via photosynthesis is lost in the sodium bicarbonate solution‚ it will not be contributing to the force pushing the leaf disc to the surface of the sodium bicarbonate solution
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Seventy-five % of the Earth is covered in water providing an environment for organisms to live in. the water molecule is made up of two hydrogen atoms and one oxygen atom. As oxygen atoms are more electronegative that hydrogen atoms the electrons shared covalently between the oxygen and the hydrogen atoms tend to spend more time near the oxygen atom making it partially negative and making the hydrogen atoms partially positive. The partial charges in the water molecule allow it to form weak or hydrogen
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