CUMULATIVE MOLE WORKSHEET (Chemistry IB) 1. How many molecules are present in 27.0 g of distilled water? A. 2.7 x 1024 B. 1.5 C. 9.0 x 1023 D. 4.5 2. How many moles of carbon dioxide will be formed when 32.0 g of methane‚ CH4‚ burns completely in oxygen? A. 1.0 B. 2.0 C. 4.0 D. 8.0 3. How many oxygen atoms are present in 0.5 mole of pentahydrated copper(II) sulfate‚ CuSO4.5H2O? A. 2.5 B. 4.5 C. 3.0 x 1023 D. 2.7 x 1024 4. What is the total number of atoms in 3.0 molecules of propanone‚ CH3COCH3
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References 1.) Lehman‚ John. Operational Organic Chemistry‚ 3rd Edition. Experiment 4 (pp. 38-45; 680-687; 644-650)‚ Prentice-Hall‚ 1999. 2.) Laboratory Reference Manual: Experiment 3. Retrieved from: http://academic.reed.edu/chemistry/alan/201_202/lab_manual/expt_salicylic_acid/background.html 3.) Lab 5: Synthesis of Salicylic Acid. Retrieved from: http://academic.evergreen.edu/curricular/whatscookin/Lab%20five%20%20methyl%20saliclate.htm 4.) Handout: Synthesis of Salicylic Acid. Retrieved
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string to a 50 g weight hanger and drape the string over the pulley. The string length should be such that‚ when one hanger hits the floor‚ the upper part of the other hanger is near the pulley‚ without touching the pulley. (You may find that the lab assistant has already set up the apparatus as described here. If so‚ double check the setup.) 2. Place equal masses of approximately 1000 g on each weight hanger. These masses should include four 5 g masses at the top of the left hanger. Hold back
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soil from the site and then take several other samples from different points on the site. This ensures variety of soil to ensure that all the site is safe‚ not just a small area where you would have taken your first sample from. I will return to the lab with the samples of soil I have extracted from the site. Here I will make a solution from the samples in order to carry out the identification tests. In order to turn my soil samples
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The book I chose is called Eat More Ice Cream! Written by Michael Bret Hood. The purpose of this book is to provide leadership lessons for every week of the year. Each chapter is about a different situation in which you can be a better leader to your followers and provides examples of bad leadership. The author of the book‚ Michael Bret Hood spent 25 years as a special agent for the FBI along with being a supervisor and a leader in the FBI. Michael was selected to be part of a team that was dedicated
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First 10 minutes all the liquids are still not frozen. Second 10 minutes all of the liquids are starting to freeze around the edges. Third 10 minutes water is almost completely ice on the surface‚ Sprite is half ice on the surface and Mello Yello‚ Orange Fanta‚ Coca Cola are still just ice around the edges. Fourth 10 minutes water is almost fully frozen‚ Sprite is not quite completely frozen on the top‚ Coca Cola‚ Mello Yello‚ Orange Fanta are all slushy. Fifth 10 minutes water is really close to
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assignment‚ you will dissolve a sample of NaCl in water and then measure the boiling point elevation for the solution. 1. Start Virtual ChemLab and select Boiling Point Elevation from the list of assignments. The lab will open in the Calorimetry laboratory with a calorimeter on the lab bench and a sample of sodium chloride (NaCl) on the balance. 2. Record the mass of the sodium chloride in the data table. If it is too small to read‚ click on the Balance area to zoom in‚ record the reading
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original state and the percent of the hydrate recovered was calculated by using the mass of the rehydrated sample by the mass of the original hydrate and then multiplied by 100%. Data Presentation & Analysis Table 1: The data was collected from the lab experiment. Sample calculations are shown. Mass of beaker with sample 30.765g Mass of empty beaker 30.263g Mass of sample .502g Mass of beaker with sample after 1st heat 30.661g Mass of beaker with sample after 2nd heat 30.657g Heating mass
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y BACHELOR OF COMPUTER APPLICATIONS (BCA) ASSIGNMENTS Year‚ 2013-2014 (5th Semester (Revised Syllabus)) (BCS-051‚ BCS-052‚ BCS-053‚ BCS-054‚ BCS-055‚ BCSL-056‚ BCSL-057‚ BCSL-058) SCHOOL OF COMPUTER AND INFORMATION SCIENCES INDIRA GANDHI NATIONAL OPEN UNIVERSITY MAIDAN GARHI‚ NEW DELHI – 110 068 CONTENTS Course Code Assignment No. Submission-Schedule Page No. For July-Dec 2013 Session For Jan-June 2014 Session BCS-051 BCA(V)-051/Assign/13-14 15th October
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Discussion In this experiment there were many things that were unexpected and rather surprising when were working. Like when we were testing the water and ice biomes there was a pretty steady temp. for both but‚ the water biome had an unexpected increase of 1.5º right at the end but this did not occur for the ice biome. With all the other biomes the temperatures increased under the lamp and when the light was turned out it decreased as suspected. Something that was strange though was that greenhouse
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