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4. Why is an anionic surfactant more stable at alkaline condition and a cationic surfactant more...
pre-laboratory Questions A 1 Explain why it is more efficient to make several extractions using small...
pre-laboratory Questions A 1 Explain why it is more efficient to make several extractions using small portions rather than one extraction using the same total volume. 2 Define the following terms: Drying agent intensity Drying agent capacity 3 Select the upper layer in each pair of mixed solvents (see Appendix C): Water and benzene Water and carbon tetrachloride Water and ether 4 Write an equation for the reaction of a benzoic acid with aqueous sodium bicarbonate. 5 Complete the following...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more physically fundamental quantity than velocity? 3. In terms of forces, what would the universe be like, qualitatively if, instead, momentum were p=>? 4. A finite collection of particles is contained in a box. The particles collide elastically with one another and the interior of the box. If we consider only the particles, then what, if any, forces are External Forces? 5. Determine the total...
given Which is more stable? Position A/ Position B (circle one) COOH COOH Which is more...
given
Which is more stable? Position A/ Position B (circle one) COOH COOH Which is more stable? Position A/ Position B (circle one) 9. Given the results of the previous problems, if an ELECTRON DONATING group is already attached to benzene, it is more stable to add the electrophile to the _position(s). Look at positions A and B in the previous problems. a. Ortho b. Meta C. Para d. Two of the above e. None of the above 10. If...
Part A 1. If you had used more methylene chloride in each step, you could have...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
Roy McNamara is a 92-year-old retired pastor hospitalized after a stroke. He is in stable condition...
Roy McNamara is a 92-year-old retired pastor hospitalized after a stroke. He is in stable condition and expected to return home to his wife within a few days. The couple has a live-in caregiver and a daughter who lives nearby. Prior to his hospitalization, Roy had a good appetite for a variety of foods and maintained his weight at 170 pounds. He is 5 feet 8 inches tall. After observing him for the past 24 hours, his nurse reports that...
c) You place your pentapeptide into a buffer with a pH=4. What direction will your pentapeptide...
c) You place your pentapeptide into a buffer with a pH=4. What direction will your pentapeptide move: Circle the correct answer. (2 marks) It will not move. Towards the positive electrode Towards the negative electrode Briefly Explain why: (2 marks) d) You are trying to separate 2 other peptides from your pentapeptide. Peptide 1 is made up of the amino acids: ARKS Peptide 2 is made up of the amino acids: ADES At what pH would you be able to...
Please help me with these questions, thank you 4. Why are virus generally more difficult to detect than other groups...
Please help me with these questions, thank you
4. Why are virus generally more difficult to detect than other groups of organisms? 5. W hy are anti-cancer drugs and anti-fungal drugs generally more toxic than antibiotics? 6. Against which population of disease producing organisms are antibiotics most effective? 7. BONUS. A gram negative organism is placed in a solution of distilled water and penicillin. What would you predict the outcome to be? Explain.
e Experiment 4 Worksheet NAME DATE STUDENT NUMBER INSTRUCTOR 1 Explain why a person could die...
e Experiment 4 Worksheet NAME DATE STUDENT NUMBER INSTRUCTOR 1 Explain why a person could die of dehydration by drinking enough 10% salt solution. Keep in mind (a) osmosis, and (b) solutions of the body have an osmotic pressure equal to a 0 89% salt solution. 2. What process would occur to cells in tissue that is injected with distilled water? Why? 3. What was the principal use of calcium sulfate, (CasOsh H2O, in hospitals? (Materials having less weight are...
Worksheel 13 (uen 4. Formic acid (0.24 mol) is placed in 2 L of water and...
Worksheel 13 (uen 4. Formic acid (0.24 mol) is placed in 2 L of water and undergoes the following reaction: Use your solver to calculate the equilibrium concentration of hydronium ion in this solution. (4.92 x 10) a. b. If the value of x is small, you can approximate the answer by assuming Gomic acid=0.12x 0.12 Approximate the answer to this problem by assuming x is small. (5.02x 10) (show work below) 5. Repeat the above problem starting with 0.00012...
9 Interpret your results: a In which tube(s) did protein digestion occur? How do you know?...
9 Interpret your results: a In which tube(s) did protein digestion occur? How do you know? b In which tube(s) did no protein digestion occur? How do you know? c What effect does pH have on protein digestion with pepsin? Why? d What other effects does acid have in the stomach? Procedure 3 Demonstrate Lipid Emulsification Let's examine what happens during the process of emulsification. In this exercise you will use four substances to observe emulsification in action: 1 Lipids:...
1. Write Newton's 2nd Law in terms of momentum, p. 2. Why is momentum a more physically fundamental quantity than velocity? 3. In terms of forces, what would the universe be like, qualitatively if, instead, momentum were p=>? 4. A finite collection of particles is contained in a box. The particles collide elastically with one another and the interior of the box. If we consider only the particles, then what, if any, forces are External Forces? 5. Determine the total...
given
Which is more stable? Position A/ Position B (circle one) COOH COOH Which is more stable? Position A/ Position B (circle one) 9. Given the results of the previous problems, if an ELECTRON DONATING group is already attached to benzene, it is more stable to add the electrophile to the _position(s). Look at positions A and B in the previous problems. a. Ortho b. Meta C. Para d. Two of the above e. None of the above 10. If...
Part A 1. If you had used more methylene chloride in each step, you could have extracted more caffeine. Explain why you did not. Hint - What step would have taken longer (Hint: not drying). PART A Mass of Beaker & Caffeine Mass of Beaker 167.750g 67.6809 Mass of Caffeine 0.0 75 Calculations. Show your work and circle the answers. Mass of caffeine recovered: 012919 b) Actual:.07 % caffeine recovered: a) Predicted: 9 7:213% b) Actual: 92.105% PART B Unknown...
Roy McNamara is a 92-year-old retired pastor hospitalized after a stroke. He is in stable condition and expected to return home to his wife within a few days. The couple has a live-in caregiver and a daughter who lives nearby. Prior to his hospitalization, Roy had a good appetite for a variety of foods and maintained his weight at 170 pounds. He is 5 feet 8 inches tall. After observing him for the past 24 hours, his nurse reports that...
c) You place your pentapeptide into a buffer with a pH=4. What direction will your pentapeptide move: Circle the correct answer. (2 marks) It will not move. Towards the positive electrode Towards the negative electrode Briefly Explain why: (2 marks) d) You are trying to separate 2 other peptides from your pentapeptide. Peptide 1 is made up of the amino acids: ARKS Peptide 2 is made up of the amino acids: ADES At what pH would you be able to...
Please help me with these questions, thank you
4. Why are virus generally more difficult to detect than other groups of organisms? 5. W hy are anti-cancer drugs and anti-fungal drugs generally more toxic than antibiotics? 6. Against which population of disease producing organisms are antibiotics most effective? 7. BONUS. A gram negative organism is placed in a solution of distilled water and penicillin. What would you predict the outcome to be? Explain.
e Experiment 4 Worksheet NAME DATE STUDENT NUMBER INSTRUCTOR 1 Explain why a person could die of dehydration by drinking enough 10% salt solution. Keep in mind (a) osmosis, and (b) solutions of the body have an osmotic pressure equal to a 0 89% salt solution. 2. What process would occur to cells in tissue that is injected with distilled water? Why? 3. What was the principal use of calcium sulfate, (CasOsh H2O, in hospitals? (Materials having less weight are...
Worksheel 13 (uen 4. Formic acid (0.24 mol) is placed in 2 L of water and undergoes the following reaction: Use your solver to calculate the equilibrium concentration of hydronium ion in this solution. (4.92 x 10) a. b. If the value of x is small, you can approximate the answer by assuming Gomic acid=0.12x 0.12 Approximate the answer to this problem by assuming x is small. (5.02x 10) (show work below) 5. Repeat the above problem starting with 0.00012...
9 Interpret your results: a In which tube(s) did protein digestion occur? How do you know? b In which tube(s) did no protein digestion occur? How do you know? c What effect does pH have on protein digestion with pepsin? Why? d What other effects does acid have in the stomach? Procedure 3 Demonstrate Lipid Emulsification Let's examine what happens during the process of emulsification. In this exercise you will use four substances to observe emulsification in action: 1 Lipids:...
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