Chemical Bonding and Molecular Structure 53 I. Structure of Matter (20%) B. Chemical bonding 1. Binding forces a. Types: ionic‚ covalent‚ metallic‚ hydrogen bonding‚ van der Waals (including London dispersion forces) c. Polarity of bonds‚ electronegativities 2. Molecular models a. Lewis structures TYPES OF CHEMICAL BONDING Ionic Bonding - two atoms of opposite charge electrically attracted to one another Covalent Bonding - two atoms each sharing electrons within a molecular orbital Metallic Bonding
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One purpose of the experiment was to gain an understanding of diffusion and osmosis‚ specifically in context of a plant or animal cell reaction to an isotonic‚ hypotonic‚ or hypertonic solution. Another objective was to understand the nuances of simple diffusion‚ facilitated diffusion‚ and active transport and to explicate the characteristics affecting the rates of diffusion. The next objective was to be able to explicate the partition coefficient and its influence on hemolysis. The final objective
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The effect of size on the effectiveness of diffusion Aim: To use agar blocks infused with 0.1 Molar sodium hydroxide (NaOH) and phenolphthalein to investigate the relationship between shape and surface area: volume ratio on the effectiveness of diffusion. Hypothesis: That for a cube of agar‚ the time taken for complete colourisation due to diffusion of HCl is directly proportional to the cubes volume. Materials: |A block of agar (10cm x 5cm x 3cm) with 0.1M NaOH and |1x 250mL
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2014 AMT 154 Weight & Balance Weight and balance is important on every aircraft. An aircraft’s performance and handling characteristics are greatly affected by the gross weight and center of gravity limits. An overloaded and improperly balanced aircraft requires more power and greater fuel consumption to maintain flight. The stability of the aircraft is also seriously impacted by the weight and balance factors of aviation. Lack of understanding the severity of the effects of weight and balance
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basic‚ losing weight is about burning more calories than what you eat. That seems simple enough‚ but if it were really that simple‚ none of us would have a weight problem. Too often we take drastic measures to see results‚ such as diets‚ pills or those weird fitness gadgets on infomercials that promise us instant success. Maybe you lose weight but what happens when you go off that diet or stop that crazy workout program? You gain it all back and more. The real secret to weight loss is to make
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women performing the “Shake Weight” ideal motion‚ and mentioning the “Dynamic Inertia Exercise” concept. The Shake Weight is an object like a dumbbell that is shaken back and forth with the help of springs at the either end. It is a well designed and clean looking product. It is targeted for the masses as it claims to be seven times more effective than a dumbbell at a very affordable price. Through its advertisements in magazines and late night television‚ the Shake Weight has grown into a product
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Purpose: The purpose of this lab is to test the effects of osmosis on eggs in hypertonic solutions and hypotonic solutions. Hypothesis: If the corn syrup is a hypertonic solution‚ then the egg’s size will shrink. If the water is a hypotonic solution‚ then the egg will swell. Materials: Styrofoam cups (2 per group) Styrofoam cups to weigh down egg (2) Balance Paper towels Vinegar (enough to cover egg) Distilled water Corn syrup Fresh eggs (2 per group) Procedure: Day
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Lipids and Phospholipids The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The head which is hydrophilic contains a group of phosphate‚ a diglyceride and a simple molecule e.g. choline. The tail is hydrophobic and is made up of fatty acids. Phospholipids receive and transmit signals across the cell membrane and act as a store room for energy. The main role of phospholipids is that they can form lipid bilayers. It is an amphipathic molecule. The
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Weight Watchers is one of the most successful diet plans in the world. Many weight watching plans have come and gone through years‚ but Weight Watchers has endured. As their moniker says‚ Weight Watchers Works‚ in large part because it’s not an actual diet plan. For example‚ when a person thinks about a diet plan‚ they think about starvation‚ denial‚ and boredom. Dieters have to deny themselves certain food groups‚ or deny themselves of anything sensible and reasonable. This is why people try these
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Weight of the Nation: Choices The main issue with people who are looking to lose weight is that everyone wants that quick fix. They don’t want to do the hard work of completely altering their lifestyle in order to get fit and obtain a healthy weight but rather want something to do that for them without having to exercise or change the way they eat. The problem with that is that there is no quick fix that is permanent. Sure there are plenty of “diets” or meal plans out there such as South Beach
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