High School Students’ Conceptions about Energy in Chemical Reactions (focusing only in exothermic and endothermic reactions). Aim The aim of this study is to investigate students’ understanding of the energy concept in chemical reactions particularly in endothermic-exothermic reactions. Both qualitative and quantitative methodology was used for this investigation. A twenty-item multiple choice test was developed about the topic to measure the students’ understandings. This concept test was
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Republic Act No. 7942 Sec. 2 Declaration of Policy. All mineral resources in public and private lands within the territory and exclusive economic zone of the Republic of the Philippines are owned by the State. It shall be the responsibility of the State to promote their rational exploration‚ development‚ utilization and conservation through the combined efforts of government and the private sector in order to enhance national growth in a way that effectively safeguards the environment and protect
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Purpose Determine which kinds of reactions involve electron transfer as the driving force. Background Redox (reduction-oxidation) reactions include all chemical reactions in which atoms have their oxidation state changed. So‚ when a metal and a nonmetal react‚ there is an ionic bond formed‚ which means one of them loses electrons while the other gains them. Since this reaction involves the exchange of electrons it is termed as a redox reaction. The oxidation states in a metal- nonmetal are simple
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STRENGTHENING THE PHILIPPINE DISASTER RISK REDUCTION AND MANAGEMENT SYSTEM‚ PROVIDING FOR THE NATIONAL DISASTER RISK REDUCTION AND MANAGEMENT FRAMEWORK AND INSTITUTIONALIZING THE NATIONAL DISASTER RISK REDUCTION AND MANAGEMENT PLAN‚ APPROPRIATING FUNDS THEREFOR AND FOR OTHER PURPOSES Be it enacted by the Senate and House of Representatives of the Philippines in Congress assembled: SECTION 1. Title. – This Act shall be known as the “Philippine Disaster Risk Reduction and Management Act of 2010”. Sec. 2.
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means their life and their sanity. thesis - Harm reduction is one of many models of substance abuse treatment which is a holistic approach that focuses on reducing the harms associated with drug use and less focus is placed on the lofty goal of abstinence. Main Points - I will discuss the general theory of harm reduction and its principles‚ its criticisms‚ and alternate treatment models for substance abuse. Body General theory of harm reduction and its principles group of policies and programs
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Chapter four Self-Assessment For many individuals feelings of anxiety and uncertainty occur when they meet someone for the first time. The feeling of anxiety can be managed in a number of ways. One way that you can go about managing your anxiety is by giving a compliment. A majority of people enjoy receiving compliments because they make people feel good about themselves. In return you will most likely receive a compliment back which will make you feel a lot better about this first encounter. Another
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Title Experiment 17 Reaction Kinetics- Determination of the Activation Energy of the Reaction Between Oxalic Acid and Potassium Permanganate. Objective To determine the activation energy of the reaction between oxalic acid and potassium permanganate. Theory and Background Activation energy is the minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport. In terms of the transition-state
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Coupled Reactions Louella Rose E. Tan‚ Frances May L. Coralde Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City 1101 Philippines Results and Discussion A combustion reaction is a reaction that liberates heat and light. Magnesium is a stable element and reacts violently with evolution of much heat and light. The reason the magnesium burned in carbon dioxide was because it combined with the oxygen in the CO2 leaving elemental carbon behind. CO2(g) C(S) + O2(g)
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Justin Pawlyna ENGL 102 – AS85 E-cigarettes and Harm Reduction Should our current approach to combat tobacco addiction focus on abstinence or harm reduction? Many believe the only way to avoid the dangers of smoking is complete cessation. With so few choices‚ most smokers today would rather continue smoking. Electronic cigarettes‚ also known as "e-cigarettes" have sparked new debate about harm reduction. Smokers have found an alternative to traditional cessation methods that are ineffective. In my
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Chemical Reactions Chemical reactions happen in almost everything around us. Reactions are very important in everyday life‚ and science. Chemical reactions are the changing of substances to other substances by the breaking of bonds in reactants and the formation of new bonds in products. There are different types of chemical reactions such as combination reaction‚ decomposition reaction‚ single-replacement reaction‚ double-replacement reaction‚ and combustion reaction. Combination
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