Write your name here Surname Other names Centre Number Candidate Number Edexcel IGCSE Chemistry Unit: 4CH0 Science (Double Award) 4SC0 Paper: 1C Wednesday 25 May 2011 – Morning Time: 2 hours Paper Reference 4CH0/1C 4SC0/1C You must have: Ruler Candidates may use a calculator. Total Marks Instructions black ink or • Usein the boxesball-point pen. page with your name‚ Fill at the top of this • centre number and candidate number. all • Answer
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The research of organic food Yining Wang— Victoria Northwood University 2011/12/01 The research of organic food Organic foods are foods that are produced without using modern synthetic inputs such as synthetic pesticides and chemical fertilizers. (Wikipedia‚ 2011‚ para. 1). Some people think organic foods are healthier than the traditional foods‚ some people oppose this opinion. The most important difference between organic foods and traditional foods is the farming method. The different
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b) Calculate the number of moles of each element in 1.25 mol glucose (C6H12O6). c) How many molecules of oxygen atoms are present in 5.00 mol diphosphorus pentoxide? d) Calculate the number of moles of hydrogen atoms in 11.5 mol water. e) A sample of ethanol (C2H5OH) has a mass of 45.6 g.How many carbon atoms does the sample contain?How many hydrogen atoms are present?How many oxygen atoms are present? Percent Composition from Chemical a) What is the percent of C & H in C2H6 ? b) What
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Quaternary ammonium compounds‚ QAC‚ are ingredients found in household products such as fabric softeners‚ detergents‚ disinfectants‚ and hair products that consist of dialkyldimethylammonium compounds (DADMC)‚ benzylalkyldimethylammonium compounds (BAC) and alkyltrimethylammonium compounds (ATMAC) (Li and Brownawell 2010). While trying to find the reason why these rivers keep getting contaminated‚ Brownawell found out that the wastewater areas found in surficial sediments around the Hudson River
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thousands of people around the panhandle as well as throughout the world. They also provide programs that teach people about how to get the nutrition they need to lead healthy lifestyles. They offer classes over the basics of nutrition‚ cooking with what you have‚ buying on a budget‚ and on organic gardening as well. Which are all reasons why I have been very excited to help and to learn about everything that The High Plains Food Bank and Garden has to offer to everyone throughout the panhandle. The High
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the benefit of climbing beans. And they are easy to harvest! The Organic Farmer A large section of the Kenyan population is unable to afford high protein food with adequate proteins‚ such as meat and eggs. This is where beans play a very important part; they are a cheap source of proteins. Unfortunately‚ the production of beans in most parts of the country is declining. The problem is the lack of good seeds . A survey by The Organic Farmer at the beginning of March this year indicated that most of
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Compound 50‚ like its known analogue 3‚ involves an α‚β-unsaturated ketone‚ an acid-sensitive reactant‚ which prevents its direct synthesis in presence of protic solvents by refluxing. Despite of this characteristic‚ 50 was formed smoothly in 5 minutes by grinding chemistry‚ solely as E-isomer‚ without any evidence of decomposition after 1H and 13C MNR analysis. This synthetic approach provides easy access to such α‚β-unsaturated N-acylhydrazones‚ which are building blocks in the synthesis of nitrogen-containing
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have in their pocket. To be frank‚ organically grown food isn’t nutritionally better than regular foods; in fact‚ some regular foods can be genetically modified to have higher concentrations of nutrients so organic loses in that regard. However‚ one of the main reasons why I advocate for organic food (if you have the means) is that its safer for your long term health and below are my reasons why. Two years ago I wrote a research paper on the environment‚ genetically modified crops and crops
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Organic fabric is sown‚ grown‚ harvested & processed through carefully implemented and monitored phases‚ utilising crop rotation and beneficial insect predators to prevent and control disease‚ weed and pest problems in the growing stages‚ as well as safe corn-starches and peroxides in the processing phase. The use of genetically modified seeds‚ toxic insecticides‚ pesticides and fertilizers & chemical inputs such as formaldehyde‚ heavy metals‚ chlorine bleaches and sulfurs are strictly prohibited
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Google’s Project Oxygen: Do Managers Matter? There has been a fundamental question that Google executives had concerned in the early 2000s: do managers matter? Through a multi-year research‚ they generated a comprehensive project called ‘Project Oxygen’ starting in late 2009—which focuses on eight key managements to become better managers. Consequently‚ the company was able to trigger significant improvements among managers and realized that “good managers do matter”. Currently‚ Google’s vice president
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