Lab 7: Catalysts Introduction Pre-Lab Questions 1. What is a catalyst? An enzyme is a biological catalyst that speeds up chemical reactions in the body. 2. If you continue to add more catalyst will the speed of a reaction always continue to increase? Explain your answer. It will continue to speed up the reaction until there is more catalyst than the limiting reactant. 3. In this lab you will produce oxygen and water from hydrogen peroxide (H2O2). Write a balanced reaction equation for this reaction
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company uses a perpetual inventory system. During September‚ the following transactions occurred. Sept. 6 Purchased 80 calculators at $20 each from DeVito Co. for cash. 9 Paid freight of $80 on calculators purchased from DeVito Co. 10 Returned 2 calculators to DeVito Co. for $42 credit (including freight) because they did not meet specifications. 12 Sold 26 calculators costing $21 (including freight) for $31 each to Mega Book Store‚ terms n/30. 14 Granted credit of $31 to Mega Book Store
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Simple and Fractional Distillation Experiment II Stancy Saji‚ 18 September 2014 Purpose Experiment II involved two kinds of distillation techniques: simple and fractional. Simple distillation was done to separate ethyl acetate—which has a usual boiling point of 77º—from a less volatile component‚ while fractional distillation was done to distinguish an ethyl acetate/n-butyl acetate mixture‚ which has boiling points of 77º and 125 º‚ respectively. Results and Discussion As previously stated the
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oxygen increases so does the number of fish observed. However‚ when the dissolved oxygen reaches 14 ppm the number of fish decreases to 10. So‚ 6ppm and 14ppm‚ 8ppm and 16ppm‚ and finally 10ppm and 18ppm‚ have a similar number of fish observed. 2. Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water. If the amount of dissolved oxygen is increased‚ then the number of fish observed will increase. 3
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College life can be rough if you aren’t prepared for it. There are a few things every college student should know to make the two to 4 year journey a little easier for them. Take control of your life. Get to class on time and every time. Study‚ study‚ and let me say it again‚ study. This is just a few things you can do to start you down a path of success. Let’s start off with taking control of your life. For most students‚ the largest difference between college and high school is at college there
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EXERCISE 2: Skeletal Muscle Physiology Student Name: Student ID#: Student instructions: Follow the step-by-step instructions for this exercise found in your lab manual and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Rename this document to include your first and last name prior to submitting‚ e.g. Exercise2_JohnSmith.doc. Please make sure that your answers are typed in RED. (You may delete these instructions
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(a) Give generalized conclusions (in point form) according to your observation in (a). 1. systolic pressure increases when the degree of exercise increases Systolic pressure increases gradually from 115 mmHg at rest to 150 mmHg during severe exercise. When thr degree of exercise increases‚ the skeleton muscle needs more energy(ATP) for rapid contraction by carrying out aerobic respiration. The skeleton muscle required faster uptake of oxygen and removal of carbon dioxide. At the same time‚ skeleton
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Fortran Exercise #2: Coefficient Of Restitution 1. DEFINITION In this lab‚ we shall be studying the coefficient of restitution of a superball. The coefficient of restitution‚ COR‚ is the ratio of the bounce-back velocity to the original velocity of an object undergoing impact (such as a ball impacting the ground after being dropped from an initial height). Using the principle of the conservation of energy‚ the COR can be used to relate the bounce-back height to the original height of a ball dropped
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to increase in direct translation to the concentration increasing. The theory surrounding this lab was to see in practice how density could be determined with displacement and then to determine whether the density does in fact increase directly with the concentration. Summary of Key Data Figure 1: From Part 1 Mass of Brass 13.2200g Initial Volume 16.86mL Finial Volume 18.45mL Figure 2: From Part 2 Mass of the Empty 50-mL Flask 37.393g Weight of Flask Filled with 50-mL of Water 87.096g Weight Closest
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Samuel Lee NT1210 Intro to Networking Instructor. Bobbie Casteel III Chapter 2 Manual Lab 2.1 Exercise 2.1.1 Explain why all of these elements are necessary for allowing one device to communicate with another. What happens if one of them is not present? Explain this circumstance for all five elements. Exercise 2.1.2 Most modern computers have device drivers for network interfaces that manage most of these elements automatically. What characteristics of modern computer networks allow this type
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