Comparison with reported results showed that the spin densities at the center of the molecule from the pure functionals of PBEPBE were underestimated. Based on the comparison made‚ it was concluded that among the methods considered‚ the suitable one for use in the calculations of pristine graphene was B3LYP. Keywords: Density functional theory; grapheme; Hartree-Fock; Møller-Plesset perturbation theory; spin contamination ABSTRAK Kesan pelumusan spin ke atas kestabilan dan ketumpatan spin di dalam
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Nowadays‚ it is very common for mothers to work outside the home. Whether‚ a woman should stay at home or join the workforce is debated by many people. Some argue that the family especially a small children may be neglected. However‚ many women need to work because of economic reasons or want to work to maintain a career. I believe that every mother has the right to work and the decision should be one that a woman makes on her own. But first‚ she should carefully consider the many problems that she
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appropriate methods to answer scientific questions and solve problems Why are Daphnia cultures ‘pre-incubated’ for 5 minutes under specified conditions‚ prior to experimentation? Criterion 4: Risk management – laboratory work Safety issues arise in all practical work‚ whether laboratory-based or field studies. In science laboratories there are a range of potential hazards that must be identified. Think about these‚ bearing in mind the experiment to be undertaken. ■ ■ ■ ■ List the
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An Investigation into How a Pendulum Works Isaac Olson Mitch Koebnick‚ Kyle Orr 13 September 2013 A Period Purpose There are three purposes of this experiment. The first purpose is to determine the relationship of the period and the amplitude of the pendulum. The second purpose is to determine the relationship of the period and the mass of the pendulum. The final‚ but most certainly not the least‚ purpose of this experiment is to determine the relationship of the period and the length
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: : Organic Chemistry I CHM 3201 4 (3+1) 160 hours per semester : : None At the end of the course‚ students will be able to: 1. Define and explain the basic concepts in organic chemistry such as electronegativity‚ orbital hybridization‚ nomenclature‚ resonance and isomerism‚ as well as organic reactions mechanisms (C4‚ CTPS) 2. to conduct experiments that demonstrate the characteristic reactions of important functional groups of organic compounds (P4) 3. interact and work together as a group
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Should mothers work outside the home? Today‚ mothers are working outside the home even though they’ve just given birth to their children. However‚ there are a lot of concerned things that must be considered but the most important things to consider are the lack of caring the children and the economic reasons. The first concerned thing for the working mothers is how to raise their children while they are working. Some mothers want to play the full role of mothers by quitting their jobs and looking
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PRESENTATIONS This evaluation will involve working in groups of 3 to prepare a written report‚ poster and a demonstration of food preparation of your chosen topic. PART A: WRITTEN REPORT This should give the reader background information on your selected topic. This information will be shared with the class as an ongoing commentary in addition to your demonstration. The report will be typed using proper report format with a title page and subheadings. It should include the a) Background
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CHEMISTRY Guess Paper – 2013 Class – XI Subject - CHEMISTRY MAX MARKS=90 ……………………………………………………………………………………… General instructions: All questions are compulsory. Marks for each question are indicated against it. Questions number 1to 8 are very short –answer questions‚ carrying 1 mark each. Answer these in one word or about one sentence each. Questions number 9 to18 are short –answer questions‚ carrying 2 marks each. Answer these in about 30 words each. Questions number19 to27
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Importance of chemistry : 1. Chemistry can improve the conditions of human life and even save lives. 2. Provides deeper knowledge. 3. * Plastics that are as strong as metals but light weight. * Personal care and household products * Polymers or various sizes and shapes * Metal alloys * Drugs from various ailment CONTRIBUTION OF CHEMISTRY : 1. Food and agriculture 2. energy production 3 . environment preservation 4 . education 5 . clothing 6. colors and
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substance‚ we choose to use the substance metaphor to describe it. We’ll use three principles to guide us in the development of the energy concept. 1. Energy can be viewed as a substance-like quantity that can be stored in a physical system. 2. Energy can “flow” or be “transferred” from one system to another and so cause changes. 3. Energy maintains its identity after being transferred. If you are unsure what we mean by the use of a substance metaphor‚ consider how we describe information
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