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Study Resources (Chemistry)

  POST-LAB QUESTIONS 1. What effect does the R-group have on the properties of an amino acid? 2. In testing the hydrolysate of aspartame, you forgot to mark the position of the solvent front on your TLC plate. (a) Could you still determine how many amino acids were in the aspartame? (b) Could you.
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  1.Research how paper is recycled and comment on how the process(es) will impact the chemical characterization of paper. Should there be ways to distinguish recycled paper from non-recycled? Among recycled batches? Present answers in three analytical areas: microscopic/visual analysis, organic, and inorganic.   .
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A. Safety concerns. 1. Why do you use a weighing container or weighing paper to hold a chemical when using a balance? 2. What precautions need to be followed when using a mercury thermometer? B. Basic principles. 1. Why do scientists use the metric system of measurements instead of the English system? 2. Solve the following.
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  7.Obtain a copy of the reference described in the text: Trejos, T., A. Flores, and J. R. Almirall. 2010. Micro-spectrochemical analysis of document paper and gel inks by laser ablation inductively coupled plasma mass spectrometry and laserinduced breakdown spectroscopy. Spectroc. Acta Pt. B-Atom. Spectr. 65 (11):884–95. Study Figure 6 in the.
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  47)How can you test the following statement using the scientific methodology? "Exam performance improves as the amount of sleep obtained the night before an exam increases." 48)A particular virus consists of only DNA and proteins. Viruses attach to the surface of a host cell and inject the viral DNA into the.
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  1)My primary health care provider can be ________.1) A)a doctor, a nurse practitioner, or a physician assistant B)a health insurance company C) only a physician D) only an MD 2)As a patient, you should ________.2) A)not have a primary health care provider B) develop health literacy C)accept all the decisions that medical professionals make D)never ask questions 3)Your.
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  11) Humans belong to which of the following domains? A) ArchaeaB) EukaryaC) BacteriaD) vertebrates11) 12) Which statement is incorrect? A)Only living things contain nucleic acids, proteins, carbohydrates, and lipids. B)Only living things maintain homeostasis. C)Only living things can grow. D)Only living things are composed of cells.12) 13) A statement such as "If human body temperature increases to.
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  POST -LAB QUESTIONS 1. When you did the bromine test, which sample contained (a) the most unsaturation, -C=C- and which sample contained (b) the least unsaturation, -C=C-?   2. Does butter contain any unsaturated fatty acids? Explain your reasoning.   3. What are the two main disadvantages of soaps versus detergents?   4. Soaps that have a.
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A. Safety concerns 1. Why do you use boiling chips when you are boiling a liquid? 2. How should you handle the hot glassware in this experiment? B. Basic principles 1. What functional groupe s) are present in reducing carbohydrates? 2. Circle and label the hemiacetal functional group and the acetal functional group in each.
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  49)It is notoriously difficult to perform unbiased studies when human subjects are used. When governmental agencies such as the U.S. Food and Drug Administration (FDA) are trying to determine the validity of scientific claims, they very closely examine the methods used in the experiments. What are the three phases of.
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  21)Information literacy involves the ability to ________.21) A)locate relevant information B)recognize what you need to know C)evaluate and apply information to a problem D)All of the above are correct. 22) A(n) ________ group is treated like an experimental group, except for the one variable being tested.              22) 23) An educated guess or a testable statement used.
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  POST -LAB QUESTIONS 1. Explain why casein precipitates when acetic acid is added to it. 2. How is the milk fat removed in the isolation procedure? 3. What functional group(s) will give a positive reaction with the ninhydrin reagent? 4. If by mistake (DO NOT TRY IT) your finger touched nitric acid and you.
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A. Safety concerns 1. Why are flames in the laboratory a concern in this experiment?   2. Why is it important to wash and rinse all test tubes before carrying out any tests?   3. What precautions do you take when dealing with concentrated nitric acid, and why should you be careful?   B. Basic principles 1. What function.
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  1.Based on the element list presented for the ICP-MS discrimination of papers approach, what would some of the practical problems be related to sample preparation? In other words, how would the analyst be confident that the element concentrations measured were attributed to the paper matrix and not incidental or contaminants? 2.How.
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A. Safety concerns. 1. How does one handle the glass electrodes of a pH meter?   2. Where do you dispose of all solutions?   B. Basic principles. 1. Oxalic acid has the formula of HOOC-COOH (an organic acid found in rhubarb leaves as its sodium or potassium salt). It is a diprotic acid. Show the formula.
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  30) A(n) ________ is a substance that appears to be identical to a drug being tested but has no known effect on the condition being studied.              30) 31) ________ is the ability to maintain a relatively constant internal environment.31) 32) A(n) ________ involves drug testing on humans.32) 33) The smallest functional unit of.
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  POST-LAB QUESTIONS 1. A student did a melting point determination for a sample of acetanilide and found a melting point of 113-114°C. What conclusion can the student draw about the sample?   2. A student in New York City carried out a boiling point determination for cyclohexane (b. p. 81°C) according to the.
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  POST -LAB QUESTIONS 1. Magnesium metal, Mg, reacts with 0.5 M HCI, but copper metal, Cu, does not. Why?   2. From the following list of chemicals, select two combinations that would lead to a double replacement reaction. Write the complete, balanced equations for the reactions of the chemicals in solution. Use Table 3.2 for.
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  POST -LAB QUESTIONS 1. Both carbon monoxide and oxygen bind at the same active site in hemoglobin. However, carbon monoxide binds so strongly that oxygen cannot displace it. What kind of an inhibitor is carbon monoxide?   2. The experiment with rennin simulates the environment in the stomach. How would the digestion of milk.
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  1. There are three (3) isomers offormula, C3HgO. Write structural formulas for these compounds. 2. Draw the structure of propane and identifY equivalent hydrogens. IdentifY equivalent sets by letters, e.g., Ha, Hb, etc. 3. Draw a staggered and an eclipsed conformer for propane, CH3-CH2-CH3, sighting along the C1-C2 bond. 4. Which position is.
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  2.Predict how paper will appear under polarized light and justify. 3.Show by calculation why aperture size is of more concern in IR than in UV/VIS.  If an aperture size of 5 x 5μm is used to gather an IR spectrum, will diffraction likely occur?  What about if this aperture size was.
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  6.Using the literature and texts as resources, describe LIBS—how it works and its relative advantages and disadvantages as an analytical method.  Include a labeled box diagram of an instrument that is NOT copied from a web resource.  Do it yourself by hand with a pencil and piece of paper.  Quaint,.
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A. Safety concerns. 1. Why must you perform the bromine addition under the hood? 2. How can you avoid contact with bromine solution?   3. What precautions do we have to take when using ethanol? 4. What protection do you need when using 25% NaOH solution? B. Basic principles. 1. Define the following terms: a. Hydrophobic b. Hydrophilic.
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4. Name the functional group that links two monosaccharides in a disaccharide. 1. How does the iodine test distinguish between amylose and amylopectin? 2. Why is sucrose a non-reducing sugar? 3. How can you tell when the hydrolysis of starch is complete? Why does the test work this 4. Why does amylose give a.
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  41)The process of evaluating evidence and its source carefully before drawing conclusions. 42)Specific areas in which certain living organisms interact with their environment. 43)The ability to maintain a relatively constant internal environment. 44)A genetic trait that helps an A)Metabolism B)Adaptive trait C)Critical thinking D)Theory E)Informed consent agreement F)Homeostasis G)Epidemiologic studies H)Ecosystem I)Placebo J)Hypothesis35)       .
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  2.In fire debris analysis, weathering is manifest by an increase in chromatographic peaks with relatively higher molecular weights, whereas in ink evidence, weathering is manifest by a shift to lower molecular weights. Why? 3.Based on your knowledge of how IR and Raman spectroscopy work, explain why Raman differentiates the two forms of.
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A. Safety concerns. 1. Do you need to wear safety glasses for this experiment?     2. When heating test tube, how do you position the open end?   B. Basic principles. For each of the reactions below, classify as a combination, decomposition, single replacement or double replacement.   Combination 1. Ba(s) + C12(g) →. BaCl2(s) 2. 2Ca(s) + O2(g).
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  1. Consider the reaction: What would happen to the color of a dilute solution containing FeCI4- if   a. we added a solution containing silver ion? (Silver ion reacts with chloride ion in solution to form the precipitate AgCl.)   b. we added concentrated HCI?   2. Would adding Hel to the H2P04-j HPO/- mixture cause a common.
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  3.A case examination reveals the following fibers on a piece of evidence. Rank them in order of likely relative evidentiary importance and justify. Number Type Color Length 1 Viscose rayon Black 3.1 mm 2 Cotton White 7.2 mm 3 Cotton Orange 0.2mm 4 Dacron Green 5.1 mm 5 Wool White <0.2 mm 6 Triacetate Orange 4.2 mm 7 Polyamide Red 2 mm     .
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A. Safety concerns 1. Why dispense acetic anhydride in the hood? 2. What precaution do you take when working with sulfuric acid? 3. Would you be able to take the aspirin you prepared internally? Explain. B. Basic principles 1. Salicylic acid can irritate the stomach. Name the structural features (called functional groups) that are responsible.
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