| |Sections of the report are clearly |This experiment is designed to determine if yeast cells undergo fermentation when placed in a closed | |labeled. |flask with no oxygen. Glucose and yeast are mixed together in a closed flask and allowed to incubate for| |No references used in the abstract |about one hour. | |Usually less
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Department of Chemistry Properties of Gases Date Submitted: June 16‚ 2013 Date Performed: June 13‚ 2010 Lab Section: Chem-181 DL Course Instructor: Purpose In this lab‚ I will be investigating some physical and chemical properties of gases and
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is from paleocimatologists look at bubbles of air trapped in the ice‚ which contain samples of the atmosphere from that time period. Paleocimatologists observe the oxygen in the ice\water molecules. Most of the oxygen atoms are in two forms called isotopes the two different isotopes are 18o and 16o which stand for 18-oxygen and 16-oxygen. The proportions of these two are really similar but different 18o is slightly heavier than 16o. The proportions of these two isotopes depend on the average temperatures
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blood being pumped around the entire body for survival. The respiratory system also has importance in the body as it is the system to transport air into the lungs to aid the diffusion of oxygen to the blood.The primary functions of the cardiovascular and respiratory systems is to provide the body with nutrients and oxygen and get rid of waste products such as carbon dioxide. During short term exercise stimulus there is a significant change in heart rate‚ blood pressure and respiratory rate as it adapts
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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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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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