Chemistry

Jordan needs to repeat the experiment but his teacher says that he needs to improve his design in his second experiment what should he do different
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(a) Find the concentration of electrons and holes in a sample of germanium that has a concentration of donor atoms equal to 1015 cm3 . Is the semiconductor n-type or p-type? (b) Repeat part (a) for silicon.
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Write an equation that represents the action in water of formic acid (HCOOH)(HCOOH) as a BrnstedLowry acid. Express your answer as a chemical equation.
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If the rate of evaporation is equal to the rate of condensation, the system is in a state of dynamic equilibrium, which cannot be disturbed. TRUE FALSE
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What happens when you add more solute to a saturated solution
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The Henrys law constant for CO2 is 3.4 102 M/atm at 25 C. Assuming ideal solution behavior, what pressure of carbon dioxide is needed to maintain a CO2 concentration of 0.10 M in a can of lemon-lime soda?
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Acetic acid, CH3CO2HCH3CO2H, is the main organic constituent of vinegar. Draw an electron-dot structure for acetic acid. (The two carbons are connected by a single bond, and both oxygens are connected to the same carbon.)
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When 2-methylpropane is treated with bromine in the presence of UV light, one product predominates a. Identify the structure of the major productb. Identify the structure of the minor productc. Draw a mechanism for formation of the major product (include all steps:initiation, propagation, and termination)
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A coal-fired power plant emitshot gases at a rate of 50 ft3/sec. The hot gas contains flyash, which is emitted at a rate of 120 lb of flyash per hour. What is the concentration of flyash in micrograms per cubic meter?
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what is bromine classified as?
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How many electrons are necessary to produce 1.0 C of negative charge? (e = 1.60 10-19 C) Group of answer choices
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The law of conservation of mass tells us, in part, that matter is neither created nor destroyed.How can the law of conservation of mass for a chemical reaction be expressed?
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Suppose a 1.30 g nugget of pure gold has zero net charge. What would be its net charge after it has 1.68% of its electrons removed?
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A solution of chloroform (CHCl3) and acetone((CH3)2CO) exhibits a negative deviation from Raoult's law. This result implies that: W. chloroform-chloroform and acetone-acetone interactions are stronger than chloroform-acetone interactions. X. chloroform-chloroformand acetone-acetone interactions are weaker than chloroform-acetone interactions. Y. acetone-acetone interactions are stronger than chloroform-chloroform interactions. Z. acetone-acetone interactions are weaker than chloroform-chloroform interactions.
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How many grams of zinc would be required to produce 9.65g of zinc hydroxide
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A sample of an alloy of aluminum contains 0.0898 mol Al and 0.0381 mol Mg. What are the mass percentages of Al and Mg in the alloy?
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PLEASE ANSWERIn electromagnetic waves High Frequency = _______________.A. high energyB. low energyC. long wavelengthsD. high amplitude
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Draw a mechanism for chlorination of 1,1,1-trichloroethane to produce 1,1,1,2-tetrachloroethane. Do not use abbreviations in your answer.
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What happens during a phase change from a solid to a liquid?1.The particles the solid vibrate faster and faster. After a while, they stop all motion.2.The particles of the solid vibrate slower and slower. After a while, they stop moving.3.The particles of the solid vibrate faster and faster. After a while, they can start to move around.4.The particles of the solid vibrate slower and slower. After a while, they can start to move around.
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There are several reagents that can be used to effect addition to a double bond including: acid and water, oxymercurationdemercuration reagents, and hydroborationoxidation reagents. Select all the reasons why hydroborationoxidation reagents were chosen to effect the following transformation instead of the other reagents?a. The reaction requires the Markovnikov product without sigmatropic rearrangement. b. Addition with acid and water as reagents avoids sigmatropic rearrangements. c. Hydroboration-oxidation reagents yield the anti-Markovnikov product of addition. d. The reaction requires anti-Markovnikov product without sigmatropic rearrangement. e. Addition with acid and water as reagents gives the Markovnikov product. f. Hydroboration-oxidation reagents yield the Markovnikov product of addition. g. The reaction requires sigmatropic rearrangement.
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In the investigation of an unknown alcohol, there was a positive Jones test and a negative Lucas test. What deductions may be made as to the nature of the alcohol? State reasons for your deductions.
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What is the volume of 2 moles of methane (CH4)? (One mole of any gas occupies 22.4 L under certain conditions of temperature and pressure. Assume those conditions for this question.) a. 44.8 L b. 22.4 L c. 20 L d. 2.0L
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How many liters are in a .00813M solution that contains 1.55 g of KBr?
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The element gallium has an atomic weight of 69.7 and consists of two stable isotopes gallium -69 and gallium -71. The isotope gallium -69 has a mass of 68.9 amu and a percent natural abundance of 60.4 %. The isotope gallium -71 has a percent natural abundance of 39.6%. What is the mass of gallium -71?
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