Experiment 5: Percent Water in a Hydrated Salt Chemistry 1300 Instructor: 2/8/12 Abstract: The purpose of this experiment was to determine the percent by mass in a hydrated salt‚ as well as to learn to handle laboratory apparatus without touching it. The hydrated salt‚ calcium carbonate‚ was heated with high temperature to release water molecules. Gravimetric analysis was used in this experiment to determine the percent by mass of water in a hydrated salt. The hypothesis of this experiment
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Regents Chemistry Quarter 1 Midterm Review 1. The percent by mass of oxygen in Na2SO4 (formula mass = 142) is closest to 1) 11% 3) 45% 2) 22% 4) 64% 2. Given the unbalanced equation: __Al(s) + __O2(g) → __Al2O3(s) 3. 4. 5. 6. 7. balance the equation using smallest whole number coefficients. The percent by mass of aluminum in Al2O3 is approximately 1) 18.9 3) 47.1 2) 35.4 4) 52.9 What is the approximate percent composition by mass of CaBr2 (formula mass = 200)
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The Chemistry of Lipids Experiment #8 Objective To observe the solubility of lipids in polar and nonpolar solvents and to compare saturated and unsaturated fats in their chemical reaction with bromine. The percent fat in a food will be determined by extraction of the fat and weighing it. Introduction Lipids‚ by definition‚ are natural substances that do not mix with water but dissolve in organic solvents. There are several classes of lipids‚ including: fatty acids‚ waxes‚ triacylglycerols
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CH213. Physical Chemistry II. Final Exam Your Name: Your Student Number: 110 Normal Points + 10 Bonus Points If you get 110 points out of 120 points‚ you will get the full 40% assigned to the midterm exam. Your scores 1) 2) 3) 4) 5) 6) Total: out of 25 out of 20 out of 20 out of 15 out of 20 out of 20 out of 120 * All the problems are connected. In other words‚ to solve the problem‚ you may need the information and/or answers given in other problems. All necessary information is basically
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solution then has a certain concentration. There are a number of ways to measure the concentration of a solution. There is molarity‚ parts per million‚ grams per liter and percent composition. To find the molarity of a solution‚ you just simply divide the moles of the solute by the liters of the solvent (moles/liters). Percent composition is calculated by dividing the mass of the compound by the total mass (mass of compound/total mass). Parts per million is calculated by finding the mass of the solute
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Phoenix Credit Policy Decisions Collins Office Supplies is considering a more liberal credit policy to increase sales‚ but expects that 9 percent of the new accounts will be uncollectible. Collection costs are 5 percent of new sales‚ production and selling costs are 78 percent‚ and accounts receivable turnover is five times. Assume income taxes of 30 percent and an increase in sales of $80‚000. No other asset buildup will be required to service the new accounts. a. What is the level of accounts
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The members who have entered the 4 Percent Group system can withdraw their participation at any given time‚ but they can still have access on the information they have given prior the cancellation. Gaining access to the educational trainings‚ webinars and skills can give the members and their companies an edge on building a firm basis for their websites that can direct them to their triumph and well-deserved earnings. Gaining admission to the 4 Percent program or platform can also provide the members
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Renewables contributed 19 percent to our energy consumption and 22 percent to our electricity generation in 2012 and 2013‚ respectively. Both‚ modern renewables‚ such as hydro‚ wind‚ solar and biofuels‚ as well as traditional biomass‚ contributed in about equal parts to the global energy supply. Worldwide investments in renewable technologies amounted to more than US$ 214 billion in 2013‚ with countries like China and the United States heavily investing in wind‚ hydro‚ solar and biofuels. Renewable
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What is Chemistry? Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics‚ by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter‚ particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom‚ as well as the subatomic realm. Really‚ they are two sides of the
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university of Business Agriculture and Technology Assignment No-01 Course name- General Chemistry “Topic” The importance of Chemistry in our daly life Submitted to Dr.Mohammad Harun-Ur-Rashid Submitted by Group-Royals Chemistry: The chemistry is the study of substances specially their structure‚ properties‚ transformations and the energy accompanying these transformation. Chemistry is very important within our daily lives. We are using it all of the time without even realizing
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