Objectives: 1. To make careful measurements of the amounts of each reactant. 2. To calculate the number of moles of each reactant. 3. To predict which reactant is in excess. 4. To use drawings to relate microscopic events‚ to write a chemical equation that represent those microscopic events. 5. To learn how to measure the volume of a liquid using a buret. Prelab Questions: 1. Calculate the number of moles in 2.65g of zinc. 2. Calculate the number of moles of hydrochloric acid
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Flame Lab Objective: How an electron absorbs energy and re-emits it as light and why different elements have different spectra. Also to learn how to use flame tests to determine the identity of unknown mixtures. Hypothesis: We know that certain compounds will burn certain flame colors because they emit different wave lengths. Introduction: Neils Bohr made the “Bohr’s Model” in 1922‚ he found that electron travel in specified fields – which‚ when excited‚ will jump to different rings
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LAB Report #3 Introduction: In this lab we have focus on Isolation of bacteria from environment. Microorganisms are found throughout the environment: in the air and water; on the surface of any object such as clothes‚ walls‚ furniture; in soil and dust; and on and in our own bodies (skin and mucous membranes). In order to demonstrate the ubiquity and diversity of microbes in the environment‚ samples from immediate areas of the environment and/or from your body will be obtained and cultured
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John Moura Chapter 2: Planning for Security Review Questions 1. Describe the essential parts of planning. How does the existence of resource constraints affect the need for planning? Answer: Organizational planning‚ described below‚ and Contingency planning‚ which focuses on planning or unforeseen events. Organizations must be able to forecast their needs relative to available resources as best they can to insure best decision making. 2. What are the three common
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Title: Penny Lab Experiment By -Objectives To determine how soap affects the surface tension of water. -Hypothesis In this experiment the hypothesis was that soap was going to affect the surface tension by weakening the bonds and allowing less water on the penny. -Materials * Penny * Beaker x2 (One containing soapy water the other containing pure tap) * Paper towels * Lab review sheet * Pencil * Pipette -Procedure First we picked who would drop the water onto
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Seed Lab I. Purpose/Question: A. What is the variable you are testing? Radish seed vs. Pea seed B. Question 1: How does seed type affect when the seeds germinate? C. Question 2: How does seed type affect the length of the stem? II. Research: List two pieces of information you learned about the variable you are testing below. The radish stem was longer. Both seeds germinated equally fast. III. Hypothesis: Make these an “If-then” statement and do not use pronouns (I‚ we‚ he‚
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Name: Angel Simon Pre–Lab Question Ocular lens 1. Label the following microscope using the components described within the Introduction. Experiment 1: Virtual Magnification Exercise Post-Lab Questions 1. At what magnification do you first notice the ragweed pollen? Answer: 1000 2. Which is bigger‚ a rhinovirus or E. Coli? Answer: E. Coli 3. Based on the magnification‚ how many of the E. Coli can fit into the same space as the
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Physics Domino Lab I. Problem: What spacing between the Domino’s will provide the fastest velocity for a line of falling Domino’s. II. Background: The Domino C.I.M. lab that we have been assigned brings forth the question of the compression of a line of Domino’s. The question is‚ what set up of Domino’s has the fastest compression time. We intend on testing this by lining up different strings of Domino’s and finding which variable of distance has the greatest compression velocity
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Abstract The purpose of this lab was to test if ethanol affects the reaction involving hydrogen peroxide and catalase. Tests were performed by putting chicken liver‚ ethanol solution (diluted ethanol solution for other trials) and hydrogen peroxide in a test tube with a side arm‚ and having a rubber tube lead the oxygen gas into a gas collection tube. Results from the tests showed a negative correlation‚ this means that the more diluted the solution of 95% ethanol was‚ the less oxygen gas collected
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Lab 3 Caloric Expenditure Anishka Bagla EXSC 205 Lab 12:00 - 13:50 Thursday Instructor: Tamara Espinet Purpose The purpose of this lab is to gain knowledge and understanding of the scientific principle of RER‚ using indirect calorimetry to measure caloric expenditure‚ including the caloric equivalent and to understand the concepts behind estimating oxygen consumption and caloric expenditure from heart rate‚ including the limitations. In addition the purpose was
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