Controlled assessment- How concentration affects the rate of reaction between sodium thiosulfate and hydrochloric acid. SA): Strategy Scientific knowledge Sodium thiosulfate (Na2S2O3)‚ also spelled sodium thiosulphate‚ is a colourless crystalline compound that is more familiar as the pentahydrate‚Na2S2O3·5H2O‚ an efflorescent‚ monoclinic crystalline substance also called sodium hyposulfite or “hypo.” Sodium thiosulphate has a melting point of 48 degrees C. It is freely soluble in water. It contains
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Solar Energy Essay Fossil fuel comes from the earth‚ from the decomposition of dead living things underground. Fossil fuel is easy to get and is cheap‚ but fossil fuel takes millions of years to form and is not a renewable energy and it contains a large amount of carbon in it. There are some types of fossil fuel like; coal‚ natural gas and petroleum. Fossil Fuel makes electricity‚ motor oils and other things that are used in our daily lives. When fossil fuels are burnt‚ they produce heat‚ which
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Combustion of Alcohols Purpose: The purpose of this investigation is to use calorimetry to determine the molar enthalpy change in the combustion of each of a series of alcohols. Question: How do the enthalpies of combustion change as the alcohol molecules become larger? Prediction: I predict the bigger the molecule the more the energy will be released. Materials: On lab sheet Procedure: On lab sheet Observation: On other page Analysis: b) i) Ethanol – q=(100g)(4.18J/g/C)(25.5C) q=10659J
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WATER QUALITY AND CONTINMINANTION Introduction I. Body Paragraph #1 – Background~ Water quality is decided by assessing three classes of attributes: biological‚ chemical‚ and physical. There are criteria of water quality set for each of these three categories of properties. The standards for drinking water are developed by the Environmental Protection Agency (EPA)‚ World Health Organization (WHO) etc. All municipal (public) water supplies must be measured against these standards. Testing how
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Self Heating Food and Drink Cans Heater meals – originally developed for military use – are ready-made self-heating meal packs. They can be heated in many ways – by pressing a button on the packaging‚ unwrapping and shaking the pack‚ or pouring the contents of one bag into another and waiting for a few minutes – all of which use exothermic chemical reactions. These meals can be used to motivate students to study such reactions relatively safely and without the use of a burner. Plus there is the
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Kaam se daro nahi‚ Kaam ko karo nahi 2) Kaam karo ya na karo‚ Kaam ki fikr jaroor karo‚ Fikr karo ya na karo kaam ka jikr jaroor karo 3) Kaam ki mat lo tension varna Family payegi Pension encomium ɛnˈkəʊmɪəm/Submit nounformal noun: encomium; plural noun: encomia; plural noun: encomiums 1. a speech or piece of writing that praises someone or something highly. synonyms: eulogy‚ speech of praise‚ panegyric‚ paean‚ accolade‚ tribute‚ testimonial‚ compliment; More Origin mid 16th cent.:
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Singapore‚ May 2007 PROMOTING SCIENCE PROCESS SKILLS AND THE RELEVANCE OF SCIENCE THROUGH SCIENCE ALIVE! PROGRAMME Grace Teo Yew Mei Clementi Town Secondary School Chan Kaling Charlene Seah Xinyi Jessie Sim Kim Sing Karine Nai Sok Khoon Clementi Town Secondary School ABSTRACT The study explores ways in which students who have participated in a curriculum innovation‚ Science ALIVE! acquire Science process skills and perceive the relevance of Science in everyday life. It investigates whether students
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Modern science and technology have changed our lives in many dramatic ways. Airplanes‚ automobiles‚ communications satellites‚ computers‚ plastics‚ and television are only a few of the scientific and technological inventions that have transformed human life. Research by nuclear physicists has led to the development of nuclear energy as a source of power. Agricultural scientists have developed better varieties of plants and highly effective fertilizers. The development of antibiotics and other new
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tackled about science such as the science itself as a form of knowledge and as a mode of inquiry and science as a social construction. Overall‚ this subject made some changes in me. The things I learned will guide me and prepare me for my future. This course inspired me to do my best as a future scientist. There are many significant ideas I have learned and encountered in Soctec such as the importance of learning science‚ technology and the effect of these to the society. Learning science is necessary
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Science in Our Daily Life Science in our daily life 1. Introduction-it is the age of science. There are many wonders of science. Science plays an important part in our daily life. It has made our life easier and more comfortable. Science is nothing but a systematic way of knowledge and living. Man’s qualities of curiou Premium 534 Words 3 Pages What Science Has Made for Us DEBATE Good Morning ma’am and my dear friends‚ today‚ we all are present here to debate on the motion “Has Science made
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