illustrate the percent ethanol concentrations of each vial containing ethanol. Vial 1 had a 27.5% ethanol concentration‚ Vial 2 had 30%‚ and Vial 3’s percent ethanol concentration could not be calculated due to too much water being in the vial. The percent ethanol concentration determines how much ethanol is present in each vial. Each vial has a mixture containing ethanol and water. The densities of each vial were used to find the percent ethanol concentration based on a graph. The percent ethanol concentrations
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Final Exam Review Chapter 2 Study Questions 1. Define the following a) element b) compound c) pure substance 2. Classify each of the following as a pure substance or a mixture. For each pure substance‚ indicate whether it is an element or a compound. Which of the mixtures are solutions a) air b) titanium c) oak d) baking soda e) oxygen f) 7-Up g) wine h) carbon monoxide 3. Label each of the following drawings as element‚ compound‚ or mixture (Assume each type of circle
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is my theoretical yield of lithium chloride? b. I actually produced 6 grams of lithium chloride. What is my percent yield? 5) Given the following equation: C3H8 + O2 ( CO2 + H2O a. If I start with 5 grams of C3H8‚ what is my theoretical yield of water? b. I got a percent yield of 75%. How many grams of water did I make? 6) Be + 2 HCl ( BeCl2 + H2 My theoretical yield of beryllium chloride was 10.7 grams. If my actual yield was 4.5 grams‚ what
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The mixture was then mixed with sulfuric acid and the organic layer was extracted via a separatory funnel. The mixture was then recrystallized from methanol and was allowed to dry and the percent yield‚ melting point‚ and the IR was obtained. The mass of the product obtained was 5.45 grams and the percentage yield was determined to be 41.95%. The melting point range obtained from the final product was 89-91°C which was much lower than the literature value of 160-163°C. The peaks from the IR showed
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EXERCISE 11 Synthesis of Aspirin (Acetylsalicylic Acid from Salicylic Acid) RAQUID‚ Rency J Group 5 18L I. Introduction Due to the demand of certain reagents in the laboratory in order to perform and conduct further experiments or produce essential compounds‚ chemists continuously develop organic synthesis. This process aims to prepare and synthesize desired organic compounds from commercially or readily available ones by providing the simplest route in synthesizing the compound
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this chapter the student should understand the mechanics of bond valuation and the simultaneous determination of prices and yields in financial markets. In addition to fixed income bonds‚ zero coupon bond and amortized loan concepts are presented. 3. The reader will study several yield concepts‚ including yield to maturity‚ holding period or realized yield‚ and expected yields with simulated future values. 4. The concept of interest rate risk is developed‚ including bond volatility concepts‚ price
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CHEM 2123 and 2125 – Organic Chemistry Lab I and II GUIDELINES FOR WRITING LAB REPORTS INTRODUCTION Writing reports in organic chemistry lab may differ from the way it’s done in general chemistry. One goal of this course is to introduce you to the record keeping methods used in research labs. Such methods are designed to organize experimental data in a format similar to that required for publication in major scientific journals. Here are some important considerations that apply in research settings
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Chapter 10 Discussion Questions |10-1. |How is valuation of any financial asset related to future cash flows? | | | | | |The valuation of a financial asset is equal to the present value of future cash flows. | | |
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interspecific competition of the wheat and mustard species together. The latter experiment’s data was divided into two sub groups of high density and low density‚ for purposes of graphing Dewitt diagrams. Dewitt diagrams are a way of expressing % yield and total productivity data so it can be evaluated and compared effectively. It has been noted that intraspecific competitions tend to be more intense than interspecific ones (Ciara‚ 1993). This is because members of the same species need the same
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believe inflation will be increasing in the future‚ the prevailing yield will be downward sloping. a) false The real rate of interest varies with the business cycle‚ with the highest rates seen at the end of a period of business expansion and the lowest at the bottom of a recession. a) True Bond price: Briar Corp is issuing a 10-year bond with a coupon rate of 7 percent. The interest rate for similar bonds is currently 9 percent. Assuming annual payments‚ what is the present value of the bond? (Round
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