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Introduction In this investigation‚ me and my partners performed an experiment to find the different energy contents in food and different amounts of energy released when consumed. Throughout this experiment our procedure was to take different food samples and use a device known as a calorimeter made from a can of aluminum‚ one large paper clips and a string of copper wire to measure the amount of thermal energy released during a reaction. By measuring the temperature difference before and after
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consume more unsaturated fat (e.g. margarine) instead of saturated fat (e.g. butter) as well as complex carbohydrates such as pasta and rice. So what are the respective amounts of CHO‚ fat‚ and protein required for a player with a daily intake of 16000 kJ or 3809 kcal. Firstly‚ for a standard healthy diet‚ general dietary recommendations of 55-60% CHO‚ 25-30% Fat and 10-15% protein are advised. A simple calculation shows that the player should be consuming 550-600g of CHO‚ 108-130g of fat and 94-141g of
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HKDSE CHEMISTRY – A Modern View (Chemistry) Coursebook 3 Suggested answers |Chapter 25 Simple molecular substances with non-octet |Page Number | |structures and shapes of simple molecules | | |Class Practice |1 | |Chapter Exercise
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NS 10.5 (pg 1 of 2) Heating and Cooling Curves What happens when we heat a sample of ice that is initially at -15°C? The addition of heat causes the temperature of the ice to increase. As long as the temperature is below 0°C‚ the sample remains frozen. When the temperature reaches 0°C (the melting point of water)‚ the ice begins to melt. Because melting is an endothermic process‚ the heat we add at 0°C is used to convert ice to water and the temperature remains constant until all the ice
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HKDSE CHEMISTRY – A Modern View (Chemistry) Coursebook 3 Suggested answers Chapter 25 Simple molecular substances with non-octet structures and shapes of simple molecules Page Number Class Practice 1 Chapter Exercise 2 Chapter 26 Bond polarity Class Practice 4 Chapter Exercise 5 Chapter 27 Intermolecular forces Class Practice 7 Chapter Exercise 9 Chapter 28 Structures and properties of molecular crystals Class Practice 11 Chapter Exercise 12 Part Exercise 14 Chapter 29 Chemical cells in daily life
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Thermodynamics I Spring 1432/1433H (2011/2012H) Saturday‚ Wednesday 8:00am 10:00am & Monday 8:00am - 9:00am MEP 261 Class ZA Dr. Walid A. Aissa Associate Professor‚ Mech. Engg. Dept. Faculty of Engineering at Rabigh‚ KAU‚ KSA Chapter #10 December XX‚ 2011 Announcements: Dr. Walid’s e-mail and Office Hours walid_aniss@yahoo.com Office hours for Thermo 01 will be every Sunday and Tuesday from 9:00 – 12:00 am in Dr. Walid’s office (Room 5-213). Text book: Thermodynamics An Engineering Approach
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reaction is 55.8 kJ. The sign of T of the reaction used for calibration is opposite to that of H. In the determination of heats of reaction‚ the reaction of 15 mL 1 M CuSO4 + 0.05 g Zn produced a net ionic equation of CuSO4 + Zn ZnSO4 + Cu. The limiting reactant of the reaction is Zn and 0.05 moles of it was used. The sign of T of the reaction used for calibration is opposite to that of H. WORKING EQUATIONS: H+(aq) + OH-(aq) H2O(l) Hrxn= -55.8 KJ/mol Hrxn=qrxn /
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1. | | | What is the pressure‚ in atm‚ of a tank of gas with a regulator that reads 1250mmHg? | | | Student Response | Correct Answer | A. | 1.64 | | B. | 490 | | C. | 1.79 | | D. | 0.608 | | E. | 1.25 | | | Score: | 0/1 | | | 2. | | | A 147.9-L sample of dry air is cooled from 88.0°C to 22.1°C while the pressure is maintained at 2.85 atm. What is the final volume in L? (Do not type the units.) | | | Student Response | Correct
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