unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate: 10.01x+(1-x)11.01=10.81 10.01x+11.01-11.01x=10.81 -1.00x=0.2 X=0.2 The Mole and Avogadro’s constant Mole: the SI unit that is used to measure how much of a substance. (balanced eqn coefficient are moles) Converting Moles -> number of particles Number of Moles = number of particles / Avogadro’s constant Avogadro’s constant: 6.02214179 x 10^23 Converting Moles to Mass/molar mass Molar
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Abstract By adding HCl to 2-methyl-2-butanol‚ through the Sn1 mechanism‚ 2-chloro-2-methylbutane is formed. Water‚ sodium bicarbonate and NaCl(aq) were then added to the 2-chloro-2-methylbutane to remove any of the excess water from the reaction. To confirm‚ a successful reaction‚ AgNO3 was added to the 2-chloro-2-methylbutane. A white precipitate formation confirmed a successful Sn1 reaction. Introduction Nucleophilic substitution reactions such as Sn1 and Sn2 allow us to convert one functional
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Everything you need to know about hydrocarbons INTRODUCTION: organic chemistry Organic chemistry is the chemistry of compounds that contain carbon and hydrogen. The element carbon has a special role in chemistry because it bonds with other carbon atoms to give a vast array of molecules. The varity of molecules is so great that we find organic compounds in many common products we use‚ such as gasoline‚ medicines‚ shampoos‚ plastic bottles‚ and perfumes. The food we eat is composed of different
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This is the smallest value of Pext can be to compress the gas isothermally (constant temperature) from 1.00 dm3 to 0.500 dm3. Note: 1 bar = 105 Pa = 2.00 dm3 bar = (2.00 dm3 bar)(10-3 m dm-3)(105 Pa bar-1) = 200 Pa m3 = 200 J OR (in SI units) (4.00 x 105 Pa){(0.500 – 1.00) x 10-3 m3) = 200 J Of course‚ Pext can be any value greater than 4.00 bar‚ so 200 J represents the smallest value of w for the isothermal compression at constant pressure from a volume of 1.00 dm3 to
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A. Role of Chemistry in Society Applications of chemical science have contributed significantly to the advancement of human civilization (1‚ 2‚ 3). With a growing understanding and ability to manipulate chemical molecules‚ the post-World War II chemist was considered a societal problem solver. They synthesized crop-enhancing agricultural chemicals to ensure a constant and viable food supply. They played a significant role in the eradication of deadly diseases by developing life-saving pharmaceuticals
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due to high evaporation and damaged aquatic life near the Great Barrier Reef caused by run-off from agricultural land. Eutrophication is caused by an excess amount of nitrate and phosphate in water bodies. It is usually caused by fertiliser run off and dumping of sewage going into waterways (basically human activity). Algal bloom is the direct result of eutrophication where suffocation of aquatic life and nutrient depletion may occur. Professionals may use a colorimetric analysis to measure the absorption
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sunlight E) the total reflection of light by metals giving them their typical luster 2) 3) Low-frequency electromagnetic fields with potential biological effects have frequencies of __________ Hz. A) 100-10‚000 B) 1-1000 C) 10-5 -10-9 3) D) 10-3 -10-5 E) 400-700 4) In the Bohr model of the atom‚ __________. A) electron paths are controlled by probability B) electrons travel in circular paths called orbitals C) electrons can have any energy D) electron energies are quantized
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Business Agriculture and Technology Assignment No-01 Course name- General Chemistry “Topic” The importance of Chemistry in our daly life Submitted to Dr.Mohammad Harun-Ur-Rashid Submitted by Group-Royals Chemistry: The chemistry is the study of substances specially their structure‚ properties‚ transformations and the energy accompanying these transformation. Chemistry is very important within our daily lives. We are using it all of the time without even realizing it. Every time
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solution which ions will be the first to be discharged at the cathode. Write the equation for the cathode reaction. Ans.: - Mg2+ Q.4. An electrode ‘A’ is connected to the positive terminal of a battery and electrode ‘B’ to the negative terminal. (i) Give the names of the electrodes A & B. (ii) Which electrode is the oxidizing electrode. Ans : - (i) A – Anode‚ B – Cathode. (ii) A. Q. 5. State the appropriate term used for : – A liquid or solution‚ which conducts electricity with accompanying chemical
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Criterion A:My personal project is the effects of cocaine and how it can affect your daily lifestyle i decided to do my project on this topic because in america cocaine is a problem now and was a big problem in our history and i wanted to see and show how the effects of cocaine has evolved over the years of its existence and it almost destroyed the society of some cities and it will be criterion B:a problem‚ for a long time in the us because there is no way to fix it. i don’t have any personal
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