Green plants absorb light energy using chlorophyll in their leaves. They use it to react carbon dioxide with water to make a sugar called glucose. The glucose is used in respiration‚ or converted into starch and stored. Oxygen is produced as a by-product. This process is called photosynthesis. Temperature‚ carbon dioxide concentration and light intensity are factors that can limit the rate of photosynthesis. Plants also need mineral ions‚ including nitrate and magnesium‚ for healthy growth. They
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the diaphragm moves down. 3. The primary stimulus for breathing is the amount of carbon dioxide in the blood. 4. Oxygen moves from the alveoli to the capillaries by means of diffusion. 5. Carbon dioxide is carried in the plasma as the bicarbonate ion. 6. Hemoglobin readily takes up oxygen in the lungs‚ where the pH is neutral and the temperature is cool. 7. At the tissues‚ oxygen diffuses out of the blood and carbon dioxide diffuses into the blood. 8. In which structures does gas exchange actually
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having water coming in contact with these kinds of products‚ such as magnesium and gasoline. According to Robert Vettori‚ “Magnesium has a strong affinity for oxygen that it attracts the oxygen from oxygen containing compounds” (5). With this said‚ it shows that the two products burning are both magnesium and an adequate supply of oxygen. The National Fire Protection Association Fire Protection Handbook expresses that water may used to extinguish magnesium fires if it can be applied very quickly
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EXPERIMENT 7: PERCENTAGE OF OXYGEN IN KClO3 Introduction: In this experiment you will determine the percentage of oxygen in potassium chlorate. You will calculate the theoretical value from the chemical formula and compare your experimental value to the theoretical value. Background: When potassium chlorate (KClO3) is heated‚ it undergoes chemical decomposition. Oxygen gas (O2) is given off and potassium chloride (KCl) remains as the residue. The equation for the decomposition of potassium
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electronegativities of the carbon and oxygen atoms that are bonded in acetic anhydride. This difference in electronegativities causes one of the carbonyl groups in acetic anhydride to break its carbon-oxygen double bond with the oxygen atom taking the pair of electrons from the pi bond and results in a negative charge on oxygen and a positive charge on carbon. The positive charge on carbon is then stabilized by the donation of a lone pair of electrons from oxygen‚ which is attached to both of the carbonyl
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moles of Iron were used 2. According to the law of conservation of mass‚ what is the mass of oxygen that reacts with the iron? 118.37g – 85.65g = 32.72 grams of Oxygen reacted with Iron 3. Calculate the number of moles of oxygen in the product. 32.72g/15.99g = 2.045 moles is the amount of moles of Oxygen produced 4. Use the ratio between the number of moles of iron and the number of moles of oxygen to calculate the empirical formula of iron oxide. Fe3O2 Procedure: Set up a Bunsen burner
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chemical substance appears. In this experiment we will be measuring the rate of decomposition of hydrogen dioxide with the following reaction: 2 H202 (aq) 4 2 H20 (l) + 02 (g) We can trap the oxygen gas created into a container thus showing the extent of the reaction and this will show the rate in which oxygen is created and how the rate will change when we use different initial concentrations. We do use a catalyst in this reaction to speed up the process and lower the activation energy needed to run
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each globin is a ‘haem’ unit. The haem is a ring structure with iron in the center. It is the iron that binds the oxygen in a weak interaction that can easily broken. A RBC (red blood cell) is packed with haemoglobin molecules. The cell has no nucleus‚ so more haemoglobin molecules can be included. 2 Function of haemoglobin in Transporting Oxygen: * transport of O2 * transport of some CO2 from body cells to the lungs * conversion of CO2 to HCO3- by the action
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------------------------------------------------- ------------------------------------------------- ------------------------------------------------- PHYSICAL STUDY NO.2 ------------------------------------------------- ------------------------------------------------- OXYGEN BOMB CALORIMETER & ORSAT APPARATUS ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- -------------------------------------------------
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2) At high altitude The effects of high altitude on humans are considerable. The percentage saturation of hemoglobin with oxygen determines the content of oxygen in our blood. After the human body reaches around 2‚100 m (7‚000 feet) above sea level‚ the saturation of oxyhaemoglobin begins to plummet. However‚ the human body has both short-term and long-term adaptations to altitude. Athletes use these adaptations to help their performance. There is a limit to the level of adaptation; mountaineers
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