Chebyshev’s Theorem and The Empirical Rule Suppose we ask 1000 people what their age is. If this is a representative sample then there will be very few people of 1-2 years old just as there will not be many 95 year olds. Most will have an age somewhere in their 30’s or 40’s. A list of the number of people of a certain age may look like this: |Age |Number of people | |0 |1 | |1 |2 | |2 |3
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Calorimetry Experiment Purpose: The objective of this lab is to determine the enthalpy change for NaOH(aq) + HCl(aq) NaCl (aq) + H2O(l) Procedure: Before measuring the enthalpy of acid base neutralization‚ my partner Brian and I determined a calorimeter constant‚ using a homemade polystyrene calorimeter. With the following formula and data: qhot= cm (Tf-Ti) qcold=cm(Tf-Ti) SYSTEM DATA SURROUNDINGS DATA Water cold Mass: 50mL Water hot Mass: 50mL C=4.18 C=4.18 Ti=20 C Ti=31
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Length of Balloon (0.1cm) Trial: Time: Seconds (0.1cm) 30 1 2.0 30 2 2.1 30 3 1.9 30 4 2.2 30 5 1.8 mean: 2.0 Displacement (meters and centimeters) (1) Work (0.1) Power (0.1) 11 m‚ 18 cm 559 279.5 11 m‚ 32 cm 566 269.5 10 m‚ 33 cm 516.5 271.8 11 m‚ 32 cm 566 257.3 10 m‚ 32 cm 516 286.7 10 m‚ 89.4 cm 544.7 273.0 Veloctiy (m/s) Displacement/Time Acceleration (m/s/s) Velocity/Time Trial 1 11.18/2.0 = 5.59 5.59/2.0 = 2.80 Trial 2 11.32/2.1 = 5.39 5.39/2.1 = 2.57 Trial 3 10.33/1.9 = 5.43 5.43/1
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Although Planck’s formula was accepted to be correct without argue‚ he was not satisfied and he tried to relate his formula with the absolute laws which he loved so much. In order to make sense of his formula he had to kick the second law of thermodynamics out the door and accepted it as a statistical law‚ as it was interpreted by Ludwig Boltzmann. He also had
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Abstract Over a two week period of time in the laboratory‚ we experimented and tested the reaction rate of a peroxidase enzyme and the factors that affected it‚ both positively and negatively. The purpose of these experiments was to probe and manipulate the activity of the enzyme peroxidase by varying temperature‚ pH‚ the amount of enzyme compared to the substrate and the effect of hydroxylamine. Peroxidase activity is expressed when the potato extract is subjected to stresses such as low temperature
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to determine the solubility constant of calcium hydroxide. But‚ there are few limitations in solubility constant concept‚ like the Diverse Ion effect and the Common ion effect. Sources of error probably were the assumptions made throughout the experiment and can be explained further by the limitations of the solubility constant. ------------------------------------------------- ------------------------------------------------- Introduction In a reaction where a slightly soluble ionic solid
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Formula One In May 2009 Max Mosley‚ then President of the Federation Internationale de l’Automobile (FIA)‚ declared that “the sport could survive without Ferrari.”1 Incensed by such brazen disregard of the team’s influence and further angered by proposed changes to the competition’s format‚ Ferrari announced that it did not intend “to enter its cars in the next Formula One world championship.”1 By June‚ eight of the ten F1 teams had declared their intention to join Ferrari’s breakaway championship
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Determination of the Formula of Magnesium Oxide. Introduction: Magnesium is a mental‚ it is known to react with oxygen. Magnesium reacts vigorously when heated in the presence of air‚ which is why we have chosen high heat in our method to facilitate combustion. This oxidation reaction produces magnesium oxide gaining oxygen from the air. When sharing of electrons occur a chemical bond is made and the atoms combine to form a molecule. So‚ the predicted molecular formula: Mg + O2--------->
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the Empirical Formula for Zinc Chloride Name:__________________________________________ Course______ Period:____ Prelab Show your Calculations for the following problems 1. How many grams of sulfur would combine with 26.1 g of potassium to form K2S? 2. A 1.31g sample of sulfur was reacted with chlorine to form 4.22g of compound. What is the empirical formula of the compound? 3. 0.256g of a lanthanum oxide was decomposed and produced 0.219g of lanthanum. What is the empirical formula
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g / 1 mol = 102.5 g Determine the number of atoms that are in 0.58 mol of Se. 0.58 mol x 6.02 x 1023 atoms / 1 mol = 3.49 x 1023 atoms How many moles of barium nitrate contain 6.80 x 1024 formula units? 6.80 x 1024 formula units x 1 mol / 6.02 x 1023 formula units = 1.13 x 101 CP Chemistry Test Review (Unit 10) Complete the following reactions‚ balance the equations and identify the type of reaction. For single and double replacement reactions indicate
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