of the lungs. (1) Gas exchange Cell respiration Deoxygenated Oxygenated 2. Explain the need for ventilation in humans. Size Humans are large‚ land-based organisms that cannot exchange gas sufficiently with the air through diffusion alone. A central ventilation system allows gases to be exchanged with the blood and carried around the body to the cells that require it. Oxygen Carbon dioxide Concentration gradient 3. Deduce the number of membranes an oxygen molecule must
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Supercritical Carbon Dioxide as a Green Solvent Gregory Absillis June 2009 The majority of chemical processes in chemical synthesis are carried out in solution and organic solvents usually are the first choice. To satisfy this demand‚ 15 billion kilograms of organic are produced worldwide each year. [1] These solvents often bear considerable risk due to their toxicity‚ flammability or environmental hazards. Furthermore‚ they have to be separated from the products and recycled or disposed at
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the baking soda hit the vinegar and lemon juice‚ the balloon started to expand.Adding the lemon juice to the baking soda creates a chemical reaction. The baking soda is a base‚ while the lemon juice is an acid‚ when the two combine they create carbon dioxide (CO2). The gas rises up and escapes through the soft drink bottle‚ it doesn’t however escape the balloon‚ pushing it outwards and blowing it up. What happen when I tested the experiment was me and my mommy had test it out and I found that two
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position and told the gas company to immediately take care of the problem. Another problem that has developed due to fracking is pollution around the dig sites. Emissions associated with combustion include nitrogen oxides‚ sulfur oxide‚ carbon dioxide and carbon monoxide. Another emission problem is the emission produced from the natural gas. Gasses such as methane‚ ethane and liquid condensate and volatile organic compounds (VOC). VOC’s have been proven to cause birth defects‚ neurological problems
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molar mass of chosen compound Marta Dürrigl 1mmA Chemical reaction: b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l) AIM: The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass. CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric acid (HCl) as it is shown in the chemical equation above. Once
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Climate change poses a real and present danger that affects every citizen in the world‚ including the generations to come. Sadly‚ this problem cannot be solved by going back in time‚ like Marty McFly‚ and changing the past. The balance of the planet depends upon the action or inaction of its citizens at this very moment to lessen their carbon dioxide emissions. These emissions act as an insulator
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their past to the nature. It happen when deforestation occurred! By definition‚ deforestation means the cutting or removal of trees from woodlands or forests in order to convert the land into commercial or logging reasons or for whatever purpose it may serve them (Hata 2008). People agree with deforestation because of agriculture and increasing of population. Deforestation is risky to environment and human being because it can cause erosion of soil‚ increases of temperature which also global warming
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D3=0 The Effect of Temperature on the Solubility of Carbon Dioxide in Water under Constant Pressure Beijing World Youth Academy Subject: Chemistry Student name: YeiYoung Choo Candidate number: 000791 011 January 21‚ 2009 Teacher Helen Xu The Effect of Temperature on the Solubility of Carbon Dioxide in Water under Constant Pressure (Evaluated for Design) Research Question What is the effect of temperature on the solubility of carbon dioxide gas in de-ionised
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consists of waste substances that may be toxic or are produced n excess by reactions inside cells. b) Explain the importance of removing metabolic wastes‚ including carbon dioxide and nitrogenous waste‚ from the body. The are many substances that need to be excreted - almost any cell product that is formed in excess by the chemical process occurring in the cells must be excreted. However there are two products that are produced in very large amounts. Carbon dioxide from respiration. Nitrogen containing
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Task 8: Explain how disability may affect development Disability can take many forms and is a serious risk factor when it comes to child development. A disabled child be it physical or learning is likely to have less opportunities in life than a child who is not disabled‚ restricting the choices of job‚ and life experiences. A child may be faced with prejudice and discrimination‚ maybe bullied and teased by peers and this will affect confidence. Children with learning and physical disorders may become
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