ratios of silver and oxygen in the reaction. Hypothesis: Silver oxide decomposes to silver metal and oxygen when strongly heated. Heating Silver oxide causes the oxygen to be driven off‚ leaving only the silver metal behind. The total mass of the products of a chemical reaction must equal the mass of the reactants. Mass of silver oxide = Mass of silver metal + Mass of oxygen The initial mass of silver oxide subtracted by the mass of silver metal corresponds with the mass of oxygen. Procedure: 1. Weigh
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Analysis: The end amount of oxygen released in the control for Class Data‚ was 49 mL. The end amount of oxygen released for the hot trial was 78 mL‚ 29 mL more than the control. The end amount of oxygen released for the cold trial was 38 mL‚ 11 mL less than the control. Conclusion: The hot trial produced the most oxygen of all three trials. Heat tends to increase the rate of chemical reactions‚ explained in the article Temperature Effects (Introduction to Enzymes) by Chris Jamison. “Like most
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air (oxygen) and water are necessary for iron to rust. The nail in water with air will rust while the nails in dry air and in boiled water with no air will not. I also predict that galvanizing the nail with zinc and greasing the nail and painting the nail and electroplating the nail will inhibit rusting. I also predict that adding NaCl to the test tube with water and air will promote rusting of the iron nail. Background information: Rusting is the chemical reaction between a metal and oxygen in
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Devon Backstrom February 5st 2013 PSU Chemistry 222 – Lab 4 Decomposition of Hydrogen Peroxide Abstract: This lab was designed to observe the decomposition of hydrogen peroxide into it oxygen and water. The equation for this reaction is H202 H2O + +1/2O2 thus by measuring volume and pressure of O2 generated the amount of O2 generated can be calculated which in turn can be utilized to determine the concentration of water already in the H2O2 solution. The results determined that 3.02% of the
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any pure oxygen or I should say there wasn’t any breathable oxygen in the air in those days. The first form on earth had to develop in the absence of oxygen using the anaerobic respiration. All the cells used this method to develop and reproduce. They used sunlight‚ water and carbon dioxide to live and the waste product was oxygen. This oxygen was pure and richer than the anaerobic life form‚ this causes the anaerobic life forms to look for places that doesn’t have little or no oxygen‚ such as in
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Gas exchange or respiration in humans is the means by which getting oxygen from air into the blood and carbon dioxide out of the blood into the air. Humans must exchange these gases with the environment because oxygen is essential for cells‚ which use this vital substance to release the energy needed for cellular activities. In addition to supplying oxygen‚ carbon dioxide needs to be removed in order to prevent the buildup of this waste product in the body tissues. As breathing is the act or process
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How exercise affects certain aspects of the body During exercise our body needs more oxygen and blood to keep the muscles activated. To grant this the heart pumps higher frequency of blood increasing the heart rate. Heart pumps blood through arteries faster resulting in a high blood pressure. Exercise increases the stroke volume (the amount of blood pumped in one beat)‚ so an increase in stroke volume means that the heart can pump enough blood to the body with fewer beats per minute. Even after the
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Regarding the TPR results: ZnFe2O4 did not show any sign of α-oxygen related to surface‚ which is looser than β or γ-oxygen related to the deeper oxygen of crystal structure. However‚ reducibility of lattice oxygen depends on the crystal size of the metal oxides; the smaller particles results shortening the distance for oxygen migration from the bulk to the surface. In summary‚ the characterizations of ZnFe2O4 reveal that the preparation protocol allowed ZnFe2O4 to have a smaller particle size and
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respiration is respiration with oxygen present. (Wright‚ 2007) The formula for cellular respiration is below: Glucose +oxygen = Energy‚ carbon dioxide and water. Carbon dioxide and water are the waste products from creating energy. Respiration can happen without oxygen. This process is called anaerobic respiration. The equation glucose+ oxygen which produces energy along with the bi-products produces 38 Adenosine Triphosphate (ATP). It produces more ATP because it has oxygen present (aerobic) this is
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Dissolved Oxygen (DO) 1. What is dissolved oxygen? Dissolved oxygen is the amount of oxygen mixed into the water and is necessary for aquatic life. 2. How does it get into the water? DO gets into the water in many different way but primarily it is absorbed from the atmosphere and aquatic plants. 3. Why is it important? DO is important because it provides oxygen to aquatic organisms and without it they wouldn’t be able to live. Low levels would cause hypoxia and make it extremely difficult for
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