Chemical and Physical Changes in Matter Purpose: The purpose is to observe chemical and physical changes and to identify each. Procedure: Do experiments 1-8 as directed by the handout. Data and Results: Experiment | Observations | Type of Change | Supporting Evidence | 1 | -After a few seconds‚ yellow smoke was produced-Wood splinters are becoming black-Bottom part of test tube has black color on the sides-Some woods splinters have been burned to ash-Middle of test tube has yellow
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Speech is silver and silence is Gold Since ancient time‚ silence is worshipped as an important component of spiritual discipline. Initially‚ the practice of this virtue may commence with some three hours of silence at noon time‚ say on Sunday or any other suitable day. This practice may be enhanced by routines‚ the vow daily from 8.00 p.m. to 8.00 a.m. the next day. During these hours‚ the exceptions could be made for prayers‚ uttering a hymn of praise for adoration of God. The vow
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fires and is a tool that you should carry when you go into the woods. Cerium and the element before‚ lanthanum are both used for dramatic spark effects in movies. They get a big block of it and put it to a grinder. Its atomic number is 58 and its chemical symbol is Ce. The last element I will discuss is neodymium. It is the best known out of the lanthanide series out of rare earths because of the one and only neodymium magnets. They are the strongest magnets in the world and there are many purposes
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Saratoga in 1777‚ Arnold achieved a gallant feat in helping the Americans win the battle‚ and his courageous actions on the field should have earned him the title of “hero‚” rather than “traitor.” Over the course of his time in the American army‚ Benedict Arnold fought in numerous battles‚ sacrificing his life for the American nation. Among these battles was the Battle of Saratoga‚ the pinnacle of his career in the army‚ before his reputation was blemished with the name traitor. Arnold’s disagreements
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Physical & Chemical Properties Data Table 1: Solubility or Reaction Substance Name Color Odor Effect of Heat Cold Water Hot Water Litmus test Dilute HCl Dilute NaOH Mg Silver None None None None Base Fizzes‚ gas‚ increased temperature None Cu Brown None None None None Base None None Zn Silver None None None None Base Fizzes None MgO White Slight odor None None Bubbles Base Dissolves‚ turns yellow‚ increased temperature None CuCO3 Green None Melts
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Chemical Equilirium _________________________________________________________________________________________________________________ __________________________________________________________________________________________________________________ DISCUSSION Chemical equilibrium and its different applications were studied in this experiment. The Le Chatelier’s principle‚ which is the main principle behind chemical equilibrium‚ states that‚ “If an external stress is applied to a system
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using an average variable cost function of the form. AVC= a + bQ+ cQ^2 (the 2 is suppose to be exponent) Where AVC=dollars per vacuum cleaner and Q=number of vacuum cleaners produced each month. Total fixed cost each month is $180‚000. The following results were obtained: Dependent Variable:AVC R-Square F-Ratio P-Value on F Observations:19 0.7360 39.428 0.0001 Variable
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Chemical Proportionality (Carbonate and Hydrochloric Acid) Introduction: The purpose of this experiment is what happens when a solid substance‚ a metal carbonate is added slowly to a solution of an acid. We are finding methods of determining acid concentration. For us to balance certain equations‚ we will use a stoichiometry. For this experiment‚ we will need to set up the ratio and finding the concentration of HCI. Procedure: • Grab 4 different beakers. • Add a small amount of sodium carbonate
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Abstract Chemical equilibrium occurs when a reversible reaction is happening forward and backward‚ at the same time by the same amount‚ is equal. Two procedures were made. First is the Effect of Concentration on Equilibrium. The solution became orange when it was diluted with ammonium hydroxide and the solution became yellow when water was added to the solution. In the second‚ Effect of Temperature on Equilibrium‚ the solution turned into a light brown gas when it was placed in the refrigerator
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Submitted: February 17‚ 2013 Title: Physical and Chemical Properties Purpose: To investigate and learn the physical and chemical properties of pure chemical substances. Procedure: I used various different tools to investigate the different physical and chemical properties‚ such as blue and red litmus papers‚ beakers‚ and wells. Data Tables: Substance Name Color Odor Heat Effect Cold H2O Hot H2O Litmus Test Dilute HCl Dilute NaOH Mg Silver None None None Not soluble‚ small bubbles Red litmus
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