Part 2: Safe work with large inductances 1. One of the main hazards of using inductances is electrical energy stored in the magnetic field. If a circuit containing an inductance is interrupted then the stored energy can release through air (forming an arc). This can destroy a switch contact‚ burn fingers‚ create other damage. In the circuit of Figure 1‚ show how to mitigate the risk (pay attention to polarity!). We give the elements in this circuit some simple values for the purpose of
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Morgan Kimmerle Monday Lab Dr. McCorkell Abstract The purpose of this study was to cross and analyze the reciprocal crosses of wild flies and mutant flies. In this lab Drosophila melanogaster commonly known as fruit flies were used to understand some important genetic principles that were once proposed by Gregor Mendel. Mutant traits can be autosomal dominant‚ autosomal recessive traits‚ or even sex-linked dominant and sex-linked recessive. F1 and F2 generations were obtained by performing
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and calculate: -empirical/molecular formulas -mass‚ moles‚ and molecules relationships In all calculations that follow‚ SHOW ALL WORK AND USE SIGNIFICANT FIGURES. 1. Write Avogadro’s number in standard and in scientific notation. 2. What is a mole? 3. (a) In your own words‚ what is molar mass? (b) Find the molar mass of the following: Fe CCl4 Al2(CO3)3 4. Perform the following conversions. a) Determine the number of atoms
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Lab Report Procedure 6.1: Perform Benedict’s test for reducing sugars. Introduction: Benedict’s tests allows for the detection of the presence of reducing sugars. All monosaccharides are reducing sugars since all of them have active carbonyl group. Some disaccharides that are exposed to a carbonyl group are also reducing sugars but less reactive than monosaccharides. By mixing the sugar solution with Benedict’s solution and heating them‚ a redox reaction will occur. The copper (II) sulphate
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remain the same. A group of clock reactions will be used to determine the effect of concentration on reaction rate. The reactions include: 1.) NaHSO3 + H2SO4 H2SO3 + NaHSO4 *this reaction occurs quickly and is common to miss 2.) KIO3 + 3H2SO3 KI + 3H2SO4 3.) KIO3 + 3H2SO4 + 5KI 3K2SO4+3H20 +3I2 4.) I2 + H2SO3 + H20 H2SO4 + 2H + 2I 5.) I2 + starch starch I2 (blue-black color) Mathematically‚ we can use the Molarity formula to solve for the molarity of each solute (KI03 and NAHSO3)
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Enzymes Lab Report Inroduction In this lab we explore an enzymes activity and how it can be affected by changes to its environment. An enzyme is a protein and is a catalyst to chemical reactions. It helps accelerate reactions by lowering the activation energy‚ which is needed for reactions in cells to progress at a higher rate. Activation energy is the minimum amount of energy needed for a chemical reaction to occur‚ yielding products from a given set of reactants. (Unit 7: Enzymes lab) Products
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Introduction The aims of the lab session was to familiarize with the principles‚ operation and application of a light spectrophotometer. This report discusses an experiment to study the relationship of absorbance and concentration‚ the interaction of electromagnetic radiant energy(ERE) and matter which is an important aspect of the Beer-Lambert ’s Law. This law states that the absorption of a compound is directly proportional to the concentration of that particular compound. This is because (a &
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Abstract: This report presents the reason why the ocean does not freeze in the winter. Since the ocean consists of salt water‚ an experiment was done to test the effect of freezing on salt water compared to pure water. The experiment was conducted three times in order to obtain accurate results and eliminate errors. In addition to the salt and pure water experiment‚ a variation of this experiment was created to test other options. In the variation experiment the effect of freezing on sugar water
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Chemists Society‚ 4th ed.‚ American Oil Chemists Society‚ Champaign‚ 1996‚ Method Ca 5a–40 3. W. Horwitz‚ J. Assoc. Off. Anal. Chem. 59 (1976) 658–661. 4. R. A. Robinson and R. H. Stockes‚ Electrolyte Solutions‚ Buterworthy Scientific Publications‚ London‚ 1959. 5. Ya. I. Tur’yan‚ O. Yu. Berezin‚ I. Kuselman‚ and A. Shenhar‚ J. Am. Oil Chem. Soc. 73 (1996) 295–301. Kuselman‚ Croat. Chem. Acta 76 (2003) 329–334. 8. H. S. Harned and B. B. Owen‚ The Physical Chemistry of Electrolytic Solutions‚ 3rd ed.‚ Reinhold
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Chem 121L Part I: Introduction Stoichiometry is the study of the quantitative‚ or measurable‚ relationships that exist in chemical formulas and also chemical reactions. In this experiment hydrogen gas will be produced from the reaction of a known mass of magnesium metal with an excess of hydrochloric acid. The theoretical number of moles of hydrogen gas may be calculated using stoichiometry and the balanced chemical equation. The theoretical volume of hydrogen gas may then be determined from
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