H_2 The purpose of this experiment is to determine the mass % of through the Volumetric Analysis method. To attain this purpose‚ a decomposition reaction was performed‚ which can be separated into two steps. First‚ 2 mL of was reacted with approximately .5 g of KI in an Erlenmeyer flask to form and a hypoiodite species. The second step is the reaction between another molecule of and hypoiodite‚ which results in reformation of the catalyst‚ potassium iodide. The catalyst is used to speed up
Premium Chemical reaction Chemistry Chlorine
In the data table above‚ the mass of penny‚ copper‚ and zinc was needed in order to determine the percent composition of copper and zinc. The mass of penny was taken on the scale in the beginning of the procedure before anything was done to the penny‚ and it was 2.51 grams. After the reaction with the hydrochloric acid and drying the copper‚ the mass is 0.35 grams. To get the mass of zinc‚ the mass of the penny was subtracted by the mass of copper. The mass of zinc is 2.16 grams. The penny is 14%
Premium Water Chemistry Oxygen
Before I wrote this essay‚ I searched for images of excessive perspiration. During my search‚ I discovered there were various outlooks on the topic‚ but two prominent images caught my eye. One of the images feature a woman‚ who appears to be resting after a workout. The other image shows a man‚ who looks like he is taking a break from work. Both images illustrate different types of individuals with the same condition‚ but the first image would be considered more appealing than the other image. The
Premium
We are the 99% The Occupying Wall Street protest has been an ongoing protest since September 17‚ 2010. (Huffington Post – Pg. 1) These people protesting believe that the United States is being treated unfairly with Economic inequality‚ high unemployment‚ greed‚ corruption‚ and financial services. Myself personally am torn between the two on taking sides. I cannot find it in my heart to say that the single parents that just lost there job and can’t feed their family deserves it. I do believe it
Premium United States Unemployment Protest
According to the 55-data collected with the result in a response rate of 100 percent‚ there are some respondents agree while the others disagree as will be discussed by being break down according to its variable. First construct is system usefulness. This variable consists of eight questions as shown in Table 3.1. Based on data in figure 3.1‚ the result on the first question shows that 6 out of 55 (11%) are feeling very satisfied with the ease of using this system‚ 10 out of 55 (18%) are satisfied
Premium Arithmetic mean Statistics Standard deviation
She finds the one neuroscientist and professor (played by Morgan Freeman) who has done research on this theory of using more than 10% of your brain‚ to help capture her journey and her new knowledge . However‚ time is limited because
Premium American films English-language films Genre
Business English Dictionary is a store that sell foods and sometime other goods but the size is typically below supermarket. 99 Speedmart is convenience store that based in Malaysia and they have over 300 outlets around Klang Valley. Three distribution centers have been set up to smooth their logistics and the latest distribution is located at Balakong Jaya. However‚ 99 Speedmart is not a solo-player in retailing market. Connivance stores chains like 7-11 Malaysia‚ KK Mart and Hypermarket chains
Premium Supply chain management
Formula and Percent Composition of the Compound Magnesium Oxide (MgO) Nice sounding title Date Performed Lab: 8/31/06 Purpose: The purpose of this lab was to confirm the chemical formula of magnesium oxide by comparing the masses of pure magnesium solid prior to any reaction and magnesium oxide solid after a reaction between all of the magnesium and oxygen from the air when heated from a Bunsen burner in a crucible. Using molar masses of both magnesium and oxygen‚ an expected percent composition
Premium Magnesium Oxide Magnesium oxide
Determining the Limiting Reactant and Percent Yield in a Precipitation Reaction Objectives: Observe the reaction between solutions of sodium carbonate and calcium chloride. Determine which of the reactants is the limiting reactant and which is the excess reactant. Determine the theoretical mass of precipitate that should form. Compare the actual mass with the theoretical mass of precipitate and calculate the percent yield. Materials: Balance 0.70 M sodium carbonate solution‚ Na2CO3(aq)
Premium
Objectives 2 Theory 2 Apparatus 7 Procedure 8 Results 10 Calculations 14 Discussion 20 Conclusion 21 Recommendations 21 References 22 Appendices 22 Abstract This experiment was performed in order to determine the molarity of a solution and the percent by mass of acetic acid‚ CH3COOH in vinegar. Acetic acid is monoprotic and belongs to the carboxyl family of organic compounds. The titration method is used to neutralize the acids by using the standardized sodium hydroxide solution. It reacts with
Premium Sodium hydroxide PH Base