minutes. 4. a) The hydrogen peroxide is used up and the manganese dioxide remains unchanged. Part two Title: Enzyme Function Purpose: To observe the role of enzymes in chemical reactions and to determine the kinds of cells that contain more of the enzyme catalase. Prior Knowledge: Enzymes are proteins that assist the chemical reactions of a cell by lowering the amount of activation energy needed to start the reactions‚ thereby enabling the cell to carry out the reactions at a faster rate; enzymes
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Flame Test Lab Question: When a compound is placed in the flame of a burner‚ what happens to the color of the flame? Hypothesis: When the compound is placed in the flame‚ the flame changes color depending on the chemical compound. When they’re heated‚ they gain energy and changed color sometimes. Safety Requirements for this Lab: Wear goggles at all times. If you want to remove them to write in your notebook you may sit at a table in the center of the room. When you sit down remove them
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labaratory report shows that when presented with an unknown chemical substance‚ identification of that substance is revealed through a seires of tests that involve chemical and physical properties of that substance. Problem: You are given an unknown chemical substance that you need to be able to identify. How are you going to do this? The compound can be either harmful or toxic‚ so what you need to do is test all of its physical and chemical properties‚ and then find out the synthesis of the substance
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Observations of Chemical and Physical Change PART 1 – OBSERVATIONS OF CHEMICAL CHANGE No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face. OBJECTIVES 1. Observe physical and chemical changes. 2. Define physical and chemical change. 3. Identify the relationship between a chemical change and a chemical reaction. 4. Observe several indicators of a chemical reaction
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Case 3: The Grayson Chemical Company The Company The Grayson Chemical Co. manufactured industrial chemicals for sale to other industrial companies. The company was about 40 years old and had been run by a stable management under only two presidents. Within the past few years‚ however‚ declining earnings and sales had brought pressure from the board of directors‚ investment bankers‚ and stockholder groups to name a new president. The company had grown increasingly stagnant – although at Grayson
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order of the private brand compound. While the chemical composition of the Taylor compound differs from that of Fertikil‚ the manufacturing process is very similar. The Taylor compound would be produced in 1000 kilogram batches. Each batch would require 60 direct labor hours and the following chemicals: The first three chemicals (CW-3‚ JX-6‚ MZ-8) are all used in the production of Fertikil. BE-7 was used in a compound that Swift has discontinued. This chemical was not sold or discarded because
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and has mass. Can be invisible (can not be seen by the naked eye). May appear to be continuous and unbroken (but it is actually discontinuous; since it is made up of tiny particles). Can be classified based on the physical state‚ or based on the chemical state or composition. Matter An apparently empty test tube is submerged‚ mouth downward in water. Only a small volume of water rises into the tube‚ which is actually filled with invisible matter‚ that is air. System The body of matter under
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heterogeneous mixture? a. salt b. nitrogen c. mud d. air ______ 6. Which process is a chemical change? a. heating to boiling b. dissolving in alcohol c. burning in air d. slicing into two pieces ______ 7. At sea level‚ water boils at 100°C. This is an example of a(n) a. chemical property. c. physical property. b. extensive property. d. chemical change. ______ 8. Every pure chemical compound consists of two or more elements that a. are combined chemically. b. can be separated by a
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Based on the spectra generated by C5H12O‚ the identity of the compound was 2-pentanol. The first step in identifying the compound was finding the degree of unsaturation. For C5H12O‚ the degree of unsaturation was zero‚ which means that the compound only has single bonds. Knowing that there were only single bonds led to the assumption that the O in the compound was either an alcohol or an ether. The IR spectrum helped in determining which functional group was present. The peak that determined the
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the body. A medicine is often a mixture of several chemical compounds. Even if it has only one active component compound often other substances are used as fillers or binders to give it bulk. Chemistry‚ the science related to chemical substances‚ provides us the tools to make and study the substances that are the constituents of almost all medicines. The past hundred years or so‚ ever since the advent of organic chemistry‚ many chemical compounds have been discovered in nature that are effective for
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