beaker with the HCl and record the mass. 5. Carefully add the marble chips and gently stir until all the CaCO3 is dissolved 6. Weigh the beaker again and record the mass. VI. Results and Calculations 7. Find the limiting reagent 8. Find the theoretical yield by multiplying the amount of moles of the limiting reactant to the molar ration of limiting reactant : ratio and by the molecular weight of the product. 9. Find the percentage yield --> Pecentage
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g KClO3 X ( 1 mol / 122.55 g ) = 1.131 mol KClO3 3. Determine the limiting reagent [if necessary] (Use mole ratios to figure out.) * Not necessary to determine because there is only 1 reactant in this decomposition reaction. 4. Use ratios to find the moles of the reactant or product you need to find. Since KClO3 is the only reactant‚ it is the limiting reagent. You use the moles of KClO3 if you have to calculate how many moles of oxygen gas (the
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culture and personality. Benedict studies different cultures such as the Zuni tribe and the Dobu Indians. Each culture she finds is so different and distinctive in relation to the norm of our society. Each difference is what makes it unique. Benedict compares the likenesses of culture and individuality‚ "A culture‚ like an individual‚ is a more or less consistent pattern of thought or action" (46)‚ but note‚ they are not the same by use of the word‚ "like." Benedict is saying that figuratively
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highest/longest distance in cm. Also to experimentally determine the % NaHCO3 in the tablet using the information from the highest/longest distance. Calculate the error and % error of NaHCO3 in an Alka-Seltzer tablet and to determine the limiting reagent for the highest/longest distance traveled. Alka-Seltzer tablets were first obtained. Vinegar‚ a 250-mL beaker‚ and a 50-mL (or 10-mL) graduated cylinder was given from the instructor. After the experiment‚ a graph of percent by mass of the reacted
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Lab 3: Bromination of Acetanilide CHEM 2110 Hassan Alsaleh 0525970 Due date :11/02/2015 Q1: To find the limiting reagent we need to find the number of moles of acetanilide‚ and the number of moles of Bromine. Mass of Acetanilide used = 0.67g Molar mass of Acetanilide = 135.16g/mol[1] Number of moles of Acetanilide = (0.67g) / (135.16g/mol) = 0‚005 mols Volume of Bromine = 0.25ml Density of Bromine = 3.103 g/ml[2] Mass of Bromine = (0.25ml) X (3.103g/ml) = 0.78g Molar mass of Bromine
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Results and Calculations: Table of reagents Name Density (g/ml) Amount used Amount # moles Bromine (excess) Trans-cinnamic Acid 1.246 g/cm3 0.148g – do conversion Dichloromethane 1‚3266 g/cm3 - Table of Results Name Amount obtained Molar Mass (g/mol) Amount used (moles) Melting point (Celsius) Color/observations 2‚3-dibromo-3-phenylpropanoic acid 0.285g 307.97 200.4 – 205.1 White powder Limiting reagent: Trans-cinnamic acid (148.16g/mol) 2.5g/148.16g/mol=0
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Ice Calorimeter Determination with Mg June 18th 2013 Abstract: This experiment determines the amount of energy needed to melt ice. A spontaneous increase in enthalpy produce by combining 0.2036g Mg and 5.00mL H₂SO₄‚ ice was melted and readings were taken by using an ice calorimeter. Readings were taken before during and after the reaction were completed. The data taken shows a value of -405 KJ/mol while the theoretical value was -483.7 KJ/mol. Calculating the experimental
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Experiment 3: Stoichiometry of a Precipitation Reaction Abstract: In this experiment the objectives were to try and predict the amount of product that was produced in the precipitation reaction of calcium carbonate by using stoichiometry. Then learn how to figure out the actual yield‚ theoretical yield and percent yield of the experiment. Experiment and Observation: The first step in the experiment was to weigh 1g of CaCl2 +2 H2O‚ then pour it into the 100mL
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Synthesis of 7‚ 7- dichloronorcarane in Carbon Addition Reaction CHM 337 | Dr. Pettit Abstract: A solution of cyclohexene‚ aqueous sodium hydroxide‚ and benzyltriethylammonium was used to synthesize 7‚7 – dichloronorcarane by the following reaction: + CHCl3 + OH - H2O + + Cl - After completion of the experiment‚ the percent recovery was calculated to be 46.21% Introduction The purpose of this experiment was to form 7‚7-dichloronorcarane by means of carbene trapping
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is doing the writing this version of history also paints our assessment of these heroes and villains. Sometimes the deeds that make one man a villain are given more weight than deeds that might deem the same man a hero. That is what happened to Benedict Arnold‚ his actions during the American Revolutionary War ensured victory for the American forces. But his acts of heroism have since been overshadowed by his final act of betrayal. When we think of the American Revolutionary War we have a tendency
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