(4 points) n = 125 4. If magnesium was the limiting reactant in this lab, calculate the theoretical yield of the gaseous product. Show all steps of your calculation. (4 points) Moles of Mg: (0.0281 g)(1 mole / 24.305 g) = 1.156 x 10^-3 moles 5. Determine the percent yield of this reaction, showing all steps of your calculation.
0.00512 * 500 = 2.56 c. 0.00806 * 319.9= 2.56 d. 0.00806 * 319.9 = 2.56 500 mL =0.5 L e. 0.0161 * 500 / 2 =2.56 4. Exercise 4: a. 0.250M; 250 mL 0.25 L (0.25) (0.25) = 0.0625 moles ZnI2 b. Prepare the solution by dissolving 19.95 grams of Zinc Iodide with 250 mL of water. c. Prepare the solution by dissolving 38.90 grams of ZnI2 with 500 mL of water.
Nest one Styrofoam cup in another 11. Obtain an exact mass of tap water (45-50g) to serve as cold water 12. Put a magnetic stirrer in the bottom of the calorimeter 13. Secure temperature probe to a ring stand 14. Place temperature probe through hole in cardboard lid and position probe about 1cm above bottom of calorimeter 15.
Ally Emerson Lab Report H. Chem. Period 3 1-11-15 How does mixing distilled water, iron, and copper (II) sulfate and then boiling the mixture help us determine the theoretical and percent yield of copper after the chemical reaction? Partner: Naomi Purpose: To determine the theoretical and percent yield of copper after a chemical reaction between distilled water, iron, and copper (II) sulfate. Hypothesis: There will be around 2 grams of copper left, which will equal a 89% yield. Materials: scale, filter paper, weighing paper, distilled water, copper (II) sulfate, iron, beaker, tongs, drip, and a funnel.
K12_1821161 $400 Answer from 3 Jan 9, 2014 1:03:23 PM Page 32. Blackboard Collaborate ?? K12_1821161 $500 Question from 3 Jan 9, 2014 1:03:23 PM Page 33. Blackboard Collaborate ?? K12_1821161 $500 Answer from 3 Jan 9, 2014 1:03:23 PM Page 34.
2010 http://www.enotes.com/earth-science/talus-pile-talus-slope 5. Wikipedia. http://en.wikipedia.org/wiki/Solifluction Pictures 1. http://www.uwgb.edu/dutchs/geophoto/structur/STDIP0.JPG dip 2. http://www.nvcc.edu/home/cbentley/shenandoah/old_rag_granite.jpg Granite 3. http://mail.colonial.net/~hkaiter/science%20images/frostwedging.gif Freeze thaw 4. http://belmont.sd62.bc.ca/teacher/geology12/photos/erosion/solifluction1.jpg Solifluction 5. http://images.statemaster.com/images/motw/national_parks/shenandoah_map.jpg Park Map 6. All other pictures are my personal
In the title Copper Crucible, the word crucible refers to cauldrons for liquefying ore, to basic analysis of idea or conviction, and to past moments distinct by a convergence of strong academic, financial, and political forces. Every one of these meanings is essential to Jonathan Rosenblum's descriptive story of the 1983 copper miners' strike against the Phelps-Dodge Corporation Reasons to Phelps Dodges Strike as Defining moment in American Labor-Management Copper Crucible, by Jonathan Rosenblum alleges that the strike by United Steelworkers of America against Phelps Dodge Corporations Copper Mines in Arizona for the period of the mid-1980s can be acknowledged as the defining moment that retunes the relationships between
4. Howell iron works purchased came with a furnace which was named Howell Iron works then traditionally pig iron would be worked into wrought iron in finery forges and later putting the furnaces more recently into steel. In these processes, pig Iron is melted and a strong current of air is directed over it while it is being stirred or agitated. This cause the dissolved impurities to be thoroughly oxidized. An intermediate known as refined iron, refined metal, and refined iron.
Karenlee Saldana August 20th, 2013 English 112 Final paper Topic: “Fracking” Question: What are the impacts of extraction activities on the environmental and human health? Hydraulic fracturing, or fracking, is a drilling method used to extract oil or natural gas from deep in the Earth (Bamberger). In the fracking process, cracks in and below the Earth's surface are opened and widened by injecting water, chemicals, and sand at high pressure. Hydraulic fracturing takes place over 2 to 5 days potential 25-40 year lifetime of a well. Meaning that you can use the same well to do hydraulic fracturing for a life plan of 25-40 years (Bamberger).
A second point charge q2 = -4.30 µC moves from the point x = 0.150 m, y = 0 to the point x = 0.250 m, y = 0.250 m. How much work is done by the electric force on q2? W (U b U a ) Ua Ub kq1q2 9(109 )(2.4)(106 )( 4.3)(106 ) 0.6192 J x1 0.150 kq1q2 x2 2 y2 2 9(109 )(2.4)(106 )( 4.3)(106 ) 0.252 0.252 0.2627 J W (U b U a ) ((0.2627) (0.6192)) 0.3565 J 2) Two stationary point charges +3.00 nC and +2.00 nC are separated by a distance of 50.0 cm. An electron is released from rest at a point midway between the two charges and moves along the line connecting the two charges. What is the speed of the electron when it is 10.0 cm from the +3.00-nC charge? KEi U i KE f U f KE f U i U