How is it that 4 out of the 118 elements comprise over 96% of all living organisms? It is due to their reactive nature and ability to form bonds. One might ask why or how they are so reactive with other elements. Just as anything else in the universe seeks stability‚ so do atoms. Each of these 4 atoms seeks stability through their electrons. For example‚ hydrogen has 1 electron in its valance shell and it has the ability to fill that shell with up to 2 electrons thus it seeks another atom that
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Sulfide). This pyrite is very reactive. It is usually the smaller crystals of pyrite found in ASS. The pyrite reacts with oxygen to create sulphuric acid (therefore disturbing the soil creates the acid‚ as the pyrite is exposed to the air). The smaller pyrite framboids (raspberry shaped granules) are more reactive than the larger ones as there is more surface area exposed to the oxygen. How does the Pyrite get there? The production of pyrite is a very specific procedure‚ requiring certain conditions‚
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Schmidt-Nielsen‚ 1997‚ 5th edition)‚ in term of but the transportation of oxygen and carbon dioxide by diffusion in human is insufficient‚ this distribution is enabled by a movement of fluid called blood‚ In effect human body use one molecule found in the red blood cell called haemoglobin‚ on the other hand the haemoglobin can be define as a molecule found in the red blood cell which deliver or transport oxygen to the rest of body muscles and tissues. In this our essay we are going to
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formed from reaction of ammonia and oxygen. Nitric acid is a colourless acid when it’s pure‚ or can be found yellow or red. This acid can be very corrosive to eyes and skin and can cause severe burns to human skin and tissues. It is miscible to water‚ and has a very pungent smell. Nitric acid is very reactive and can is able to melt many metals‚ and non metals. As a solution‚ nitric acid is known as a good conductor of electricity. When combining ammonia and oxygen‚ water and nitrogen‚ it is known
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the conditions on early Earth and the origin of organic molecules. - Conditions of early Earth: Massive oceans existed Only small landmasses above the surface of the water No ozone layer Large amounts of radiation reached the Earth No free oxygen in the air Large amounts of volcanic activity; heat‚ ash‚ dust and gases into atmosphere Violent electric storms common Atmosphere contained some water vapour (H2O)‚ hydrogen (H2)‚ hydrogen cyanide (HCN)‚ a lot of carbon dioxide (CO2)‚ nitrogen
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clothes. Catalyse is an enzyme found in all living cells. It makes Hydrogen Peroxide decompose into water and Oxygen. We will be measuring the amount of Oxygen released from the Hydrogen Peroxide. In order to do this we will use a measuring cylinder. This piece of apparatus measures the amount of Oxygen given off‚ measuring in cm3. This will help us measure the amount of Oxygen more accurately. To make the test fair‚ the following parameters must remain constant during the experiment
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NADPH. The occurrences of light-dependent reactions happen within the THYLAKOIDS of the chloroplasts. The substances consumed during this reaction is light‚ which is absorbed by chlorophyll molecules‚ which then produces hydrogen ions‚ electrons‚ oxygen gas‚ ATP and NADPH. “The light-dependent reactions drive the light-independent reactions‚ which means the products of the light-dependent reactions‚ ATP and NADPH‚ are required for the light-independent reactions to proceed.” (Photosynthesis Lab
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[pic] |THE MECHANISM FOR THE ACID CATALYSED HYDROLYSIS OF ESTERS | | | |This page looks in detail at the mechanism for the hydrolysis of esters in the presence of a dilute acid | |(such as hydrochloric acid or sulphuric acid) acting as the catalyst. It uses ethyl ethanoate as a typical| |ester.
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during aerobic respiration (respiration that uses oxygen) chemical reactions occur that: * use glucose (a sugar) and oxygen * release energy. * c) Know and understand that aerobic respiration takes place continuously in both plants and animals. * d) Know that most of the reactions in aerobic respiration take place inside mitochondria. * e) Know that aerobic respiration is summarised by the equation: * glucose + oxygen ==> carbon dioxide + water (+ energy) * f)
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RESPIRATORY SYSTEM OBJECTIVE QUESTION 1) High-flying birds are able to obtain enough oxygen even when the air is very thin because A) they have more efficient lungs than other vertebrates. B) they have reduced amounts of hemoglobin in their blood. C) their mitochondria are more efficient than those of other vertebrates. D) their heart can increase or decrease in size as altitude changes. E) they are able to store oxygen in oxygen chambers within muscle cells. 2) If you were to move from around sea level to
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