The unknown carboxylic acid’s melting point was 108°C according to the Mel-Temp machine. The melting point is the temperature at which a solid precipitate changes into its liquid form upon heating. The melting point of benzoic acid‚ the aromatic carboxylic acid was 122°C. Thus‚ the product contained impurities which caused the solid to melt at a lower temperature than the actual temperature. Pure solids typically melt at higher temperatures while impure solids melt at lower temperatures. This is
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energy lost by Calcium Chloride and gained by Ammonium Nitrate when dissolved in Water. Theory: Exothermic reactions are when net energy is lost in process of reaction. When solid calcium chloride (chemical formula CaCl₂) is placed in water‚ the calcium chloride dissolves and liberates heat in the process. Calcium chloride is one of the ingredients in instant "hot packs" sold in retail stores. Some concrete mixes incorporate calcium chloride to decrease drying time. Calcium chloride is also used as a
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Process Analysis Essay; How To Lose Weight Obesity is one of the highest leading causes of death in the world. Most people struggle with disappointment and frustration with weight loss. Commonly‚ we are impatient‚ and want our fat melted away now. Americans spend millions of dollars a year on useless‚ so called miracle pills‚ or fat burning‚ movie star sponsored‚ elixirs. Even more money is spent going under the knife‚ whether it be a gastric bypass or the more common plastic surgery‚ like liposuction
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English 1020 The Great Debate: Weight Machines vs. Free Weights The debate between free weights and weight machines has been around as long as the machines themselves. From body builders to stay-at-home moms trying to stay in shape‚ the great debate has been fueled by the fact that there is no ‘one size fits all’ method. Individuals are encouraged to find the method that works for them. There are many angles from which this argument may be examined such as cost‚ safety‚ effective
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1. Eat Breakfast Every Day. One habit that’s common to many people who have lost weight and kept it off is eating breakfast every day. "Many people think skipping breakfast is a great way to cut calories‚ but they usually end up eating more throughout the day‚ says Elizabeth Ward‚ MS‚ RD‚ author of The Pocket Idiot’s Guide to the New Food Pyramids. "Studies show people who eat breakfast have lower BMIs than breakfast-skippers and perform better‚ whether at school or in the boardroom." Try a bowl
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CHEM 120 (Fall 2011) 1. Test #1 (Version 001) Page 2 of 8 (0.5 marks) Elemental mercury‚ Hg(l)‚ has a density of 13.6 g mL−1 at 25°C. What is the volume of 4.25 grams of Hg(l)? A. B. C. D. E. 0.313 mL 3.20 mL 17.8 mL 57.8 mL none of the above 2. (0.5 marks) What is the mass of 0.45 mol S? Choose the closest value. A. B. C. D. E. 9.7 g 0.45 g 14 g 0.049 g 15 g 3. (0.5 marks) Balance the following equation using the smallest whole number coefficients. C5H10O5 + O2 → H2O + CO2 What
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Drastic weight loss seems almost impossible to accomplish when one chooses to lose weight naturally. This is because naturally losing weight takes time in allowing the body to adapt to lifestyle changes one undergoes in a diet. Losing weight is all a matter of decreasing your calorie intake‚ consuming less than you burn. However‚ some people feel the need to take shortcuts using minimal effort with great results. Such results would be an effect from stimulants‚ diet pills‚ starvation and medical
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As the bell sounded‚ the little freshmen‚ surrounded by the muscle-ripped seniors‚ began their dreaded walk to the weight room. The workout consisted of a pushup circuit as defined by Merriam Webster and by me as an hour full of pain and suffering. During the workout the little freshmen could not even come close to keeping up with the burly seniors‚ but when a high school football coach is watching every elbow contraction‚ keeping up is required. When this hour of agonizing pain and suffering
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Low birth weight and preterm babies in United States is increasing. Low birth weight babies are babies who are born with the birth weight of less than 5 lbs. either due to preterm delivery or due to restriction of growth inside the uterus. These low birth weight babies are at increased risk for early death and long-term health and developmental issues than infants born later in pregnancy or at higher birth weights. Not all preterm infants are low birth weight‚ and vice versa. Racial/Ethnic
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State the principle of triple beam balance A beam balance measures mass as opposed to weight‚ so the mass you weigh will be the same on the moon as it is on earth. Gravity is taken out of the equation‚ unlike a spring balance that measures weight and would measure an article to be 1/6 of the weight on the moon as it would be on earth using the same spring balance that relied on gravity. The principle is that of moment‚ or turning force/torque)‚ calculated by force x distance. Fundamentally‚
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