Introduction: Copper has played a vital role in past civilizations and continues to do so today due to its many properties as a metal. Although advantageous in today’s economy and also in human bodies‚ high concentrations of copper can prove toxic to our health and even pollutant to the environment. By altering the element through a number of chemical reactions including redox‚ metathesis‚ decomposition‚ and single replacement reactions‚ the cycle will be complete once solid copper is recovered.
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Experiment 5 In the first part of this lab‚ the objective was to get the molar concentration of sodium hydroxide by using the secondary standard‚ sodium hydroxide solution with the primary standard‚ potassium hydrogen phthalate. With this information‚ we could create a second derivative plot‚ which can be used to obtain the exact concentration of the secondary standard‚ sodium hydroxide. Also‚ the indicator can give us these results along with the end points and with the readings from the pH meter;
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Cu2+(aq) + Zn + Cu + Zn2+(aq) (Balanced) Stage 1 Dissolution of Copper Mass of vial & copper = 3.598g Mass of vial = 2.504g Mass of copper = 1.094g Calculate the moles of copper‚ this is the mass of copper (in g) divided by the atomic mass of copper‚ (63.5 g/mol) Moles of copper = mass (g) ÷ (63.5 g/mol) = 0.017g/mol Copper description Solid ribbons‚ of a reddish-brown metallic appearance. HNO3 description Clear transparent
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In Copper Sun‚ Amari is a happy teenage and she is a slave. She was engaged to the most handsome man in her African village. One morning Amari goes outside and her little brother kwasi was hanging from a tree being silly and Amari goes to get her mom some vegetables for breakfast and out of nowhere white men enters Amari’s village setting things on fire and killing people. After a while then men took chained and shackled her and put her into a slave ship. A few weeks later Amari was sold to a man
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Thermochemistry: An Ice Calorimeter Determination of Reaction Enthalpy Curtis M. Franklin Thursday‚ February 14‚ 2013 ABSTRACT An ice calorimetric measurement was used to determine that a reaction involving solid magnesium metal and 1.00M sulfuric acid produces an experimental a value of ∆H = -226 ± 28 kJ/mol at 0°C. This is about 48.4% lower than the expected value reported at 25°C. Introduction Many chemical reactions exhibit themselves by exchanging heat energy‚ either be absorbing
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Chilean Copper Mine Collapse Chilean Copper Mine Collapse A small copper mine in San Jose‚ located in north Chile‚ collapsed trapping workers underground. The mine collapsed on August 5th‚ trapping 33 workers in the mine. The coverage of this mine collapse came two long weeks after the traumatic event. Initially the incident did not catch any news worthy attention. Mine collapses are pretty common but the accident finally caught the interest of an editor‚ and then it went viral from
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AP Chemistry 12/13/11 Round-Trip Copper Reactions Lab The purpose of this lab was to evaluate our skills of decanting a supernatant liquid without losing the solid and successful completion of a series of reactions. This was done through five chemical reactions involving copper. In this lab‚ elemental copper was put through five different chemical reactions in order to convert it into different compounds. By the end of the fifth reaction‚ the copper was back to its elemental state. In the
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Plastic Milk Chlorofluorocarbons(CFC’S) were highly destructive to the environment which the plastic produces when burnt.This makes the ozone layer thinner that causes Global Warming. Global Warming is the changes in weather occuring on Earth that perhaphs makes our planet warmer and the reason for unpredictable weather. So scientist found out some alternative plastic which is way better because it is healthy to the environment the so-called ‘’Plastic Milk’’.It contains casein a protein found
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Revenue Estimates Revenue Item 100% Monthly 75% Monthly 50% Monthly Notes Rooms $2‚956‚500 $2‚217‚375 $1‚478‚250 8‚100 daily Leases $180‚000 $135‚000 $90‚000 TOTAL REVENUE $3‚136‚500 $2‚352‚375 $1‚568‚250 Expences TOTAL VARIABLE COSTS $454‚000 $340‚500 $227‚000 TOTAL FIXED COSTS $1‚403‚000 $1‚403‚001 $1‚403‚002 TOTAL EXPENSE BEFORE IT $1‚857‚000 $1‚743‚501 $1‚630‚002 EBIT $1‚279‚500 $608‚874 -$61‚752 Depreciation $320‚000 $320‚001 $320‚002 EBITDA
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Question 1 (5 points) $100 today is worth the SAME as $100 tomorrow. True False FALSE Question 2 (5 points) At an interest rate of 10% it is better to have $100 today than $120 in 2 years. True TRUE False Question 3 (5 points) Megan wants to buy a designer handbag and plans to earn the money babysitting. Suppose the interest rate is 6% and she is willing to wait one year to purchase the bag. How much babysitting money (to the nearest whole dollar) will she need to earn today to
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