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What is true about both sodium and gold? A. They are metals. B. They are very reactive. C. They are volatile. D. They are in the same group.
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There are 8 people having breakfast. each person wants 1/2 of an omelet. how many whole omelets are needed
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A copper sheet is heated in a furnave until it melts. Thr hot liquid copper is then cooled until it becomes a solid again. Compare the mass of the copper before and after melting
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Online Discussion 2: Artifical Sugars22 unread replies.22 replies. 1.Watch these videosSplenda was born as an insecticide!! Use stevia instead! (Links to an external site.)Links to an external site.Th
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What is enthalpy a measure of? A. The heat content of a system. B. The kinetic energy of a system. C. The number of moles of a reactant in a system. D. The disorder of a system.
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The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is the pressure when its volume is changed to 2.00 L? Use: P1V1=P2V2 A) 0.225 atm B) 0.
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The diagram below shows the movement of particles. mc002-1.jpg What does this piece of evidence best support? A.the collision theory B.the Maxwell-Boltzmann distribution C.the effect of pressure on re
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A scientist is studying a chemical reaction. She predicts that after the reaction the product will have less chemical potential energy than the reactants had originally. The scientist observes the rea
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Write the chemical equation for the reaction of monohydrogen phosphate ion, hpo42− with water. (include all phases in your answer)
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The formation constant* of [m(cn)6]4– is 2.50 × 1017, where m is a generic metal. a 0.160-mole quantity of m(no3)2 is added to a liter of 1.410 m nacn solution. what is the concentration of m2 ions
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Methanol (ch4o) is converted to bromomethane (ch3br) as follows: ch4o + hbr → ch3br + h2o if 12.23 g of bromomethane are produced when 5.00 g of methanol is reacted with excess hbr, what is the perc
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Identify the compound with the largest dipole moment in the gas phase. identify the compound with the largest dipole moment in the gas phase. clf hf cl2 lif
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For a certain reaction, kc = 7.54×10−8 and kf= 1.84×10−5 m−2⋅s−1 . calculate the value of the reverse rate constant, kr, given that the reverse reaction is of the same molecularity as the
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Calculate the number of pounds of co2 released into the atmosphere when a 24.0-gallon tank of gasoline is burned in an automobile engine. assume that gasoline is primarily octane, c8h18, and that the
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A tank contains 100 grams of a substance dissolved in a large amount of water. the tank is filtered in such a way that water drains from the tank, leaving the substance behind in the tank. consider th
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A 30.0-ml sample of 0.165 m propanoic (ch3ch2cooh) acid is titrated with 0.300 m koh. the ka of propanoic acid is 1.3 x 10-5. calculate the ph after 10.0 ml of the base has been added.
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A certain first-order reaction () has a rate constant of 8.70×10−3 at 45 . how many minutes does it take for the concentration of the reactant, , to drop to 6.25 of the original concentration?
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Copper has two naturally occurring isotopes: Cu-63 with a mass of 62.9396 amu and an natural abundance of 69.17% and Cu-65 with mass of 64.9278 amu and a natural abundance of 30.83%. Calculate the ato
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A coal-fired electric company uses a tremendous amount of water to produce electricity. For this reason, many are built on the banks of rivers. The water is heated several degrees during the many proc
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Which correctly describes the relationship between a hydrate, water, and an anhydrous compound? Heating an anhydrous compound forms water and a hydrate. Adding water to an anhydrous compound forms a h
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An owl and a bat share the same kingdom and phylum; an owl and a robin share the same kingdom, phylum, and class. Which of the following statements is correct?
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A 4.0 L container stores 4.0 grams of an unknown gas at 2.3 atm of pressure and 30.0 degrees Celsius. What is the molar mass of the unknown gas?
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A 0.1350-g rock sample of unknown concentration was dissolved in hcl and diluted to 100.0 ml. aliquots of 10.00 ml of this unknown solution were added to different volumes of a 2.08 μg/ml ca standard
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Be sure to answer all parts. when heated, lithium reacts with nitrogen to form lithium nitride: 6li(s) + n2(g) → 2li3n(s) what is the theoretical yield of li3n in grams when 12.5 g of li is heated w
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When solid ammonium chloride dissociates at a certain temperature in a 0.500dm3 container, ammonia and hydrogen chloride are formed. NH4Cl(s) NH3(g) + HCl(g) The initial amount of ammonium chloride wa
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The structure of a simple compound can often easily be deduced from its 13c- and 1h-nmr spectra. a draw the structure of a compound of formula c7h14o for which 13c- and 1h-nmr spectra are shown below.
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When sodium reacts with chlorine, sodium chloride is produced. andrew represented this reaction with this equation: Na+CI2 =2NaCI
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Which situation would be considered pseudoscience? Students gather to identify species of plants in their neighborhood. A student’s lucky necklace helps her win another volleyball tournament. Stu
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Please answer ASAP for brainiest and 40 points!! Research the use in the military of magnetic anomaly detectors, MADs. Write a brief 300-word essay answer the following questions on MADs. What is the
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The "medium-sized" tides that occur across the entire Earth's surface during the Quarter Moon phases are called
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Which interaction produces dispersive forces by creating temporary dipoles that induce dipoles in other molecules? dipole-dipole hydrogen bonds dipole-induced dipole induced dipole-induced dipole
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Instructions:Drag each label to the correct location on the image. Not all labels will be used. Match the labels with the symbols on the weather map.
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Strong basis and strong acid that form salt XA, if such ionic - molecular equation H2O = OH- + H+ correspond to its hydroysis. What salt is it? 1) NaNO3 2) CuCl2 3) K2CO3 4) CrCl3 5) NH4NO2
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Given the reaction: HSO4– + HPO42– ↔ SO42– + H2PO4-Which pair represents an acid and its conjugate base? A) HSO4- and HPO42- B) SO42- and H2PO4- C) HSO4- and SO42- D) SO42- and HPO42-
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In the text box provided, comment on the values of ksp that you obtained in this experiment. compare and contrast the values you obtained in pure water, in 0.01 m kio3 both with and without including
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-before lighting burner, you should close the _______ and the ________ on the burner. -the gas should always be turned on and off at the___________. -the burner should be lit by holding the _________
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2H2 + O2 → 2H2O If 720.8 g of water are produced from the reaction, calculate the following: moles of H2: moles of O2: grams of O2: ***I am in urgent need of help***
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A 60.0 ml solution of 0.123 m potassium alaninate (h2nc2h5co2k) is titrated with 0.123 m hcl. the pka values for the amino acid alanine are 2.344 (pka1) and 9.868 (pka2), which correspond to the carbo
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A 10% glucose solution is placed in the thistle tube. the thistle tube is placed in a beaker that contains a 5% glucose solution. there is a differentially permeable membrane across the broad end of t
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For the reaction shown, compute the theoretical yield of product in grams, for each of the folling initial amount of reactants. 2 Al(s) + 3Cl2(g) = 2AlCl3(s)
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For the reaction shown, compute the theoretical yield of product in grams, for each of the following initial amounts of reactants. 2 Al(s) + 3 Cl2 (g) = 2 AlCl3(s)
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Write a conclusion that explains why you believe one alternative energy technology is better than the other. Your conclusion should include your analysis regarding the feasibility, cost, and benefits
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Consider the following equilibrium: 4KO2(s) + 2H2O(g) 4KOH(s) + 3O2(g) Which of the following is a correct equilibrium expression? Keq=[KOH]4[O2]3[KO2]4[H2O]2 Keq=[H2O]2[O2]3 Keq=[KO2]4[H2O]2[KOH]4[O2
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1. What are two ways that rocks are broken down into smaller pieces?2. Weathering and erosion are two processes that shape Earth's surface. Which of the following sets of factors causes both weatherin
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Humans exhale carbon dioxide when they breathe. If the concentration of carbon dioxide in the air that people breathe gets too high, it can be fatal. Therefore, in space shuttles, submarines, and othe
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How many moles of hydrogen gas would be needed to react with excess carbon dioxide to produce 65.1 moles of water vapor?
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Elements 2,5,18,29, and 33 are colorless, odorless, unreactive gases. Of these gases , element 29 has the largest mass
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What determines the viscosity of magma? What else determines whether a volcano will erupt violently or calmly?
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All of these are required categories on a safety data sheet except A. manufacturer's trade name. B. physical/chemical characteristics. C. hazardous ingredients/identity information. D. manufacturer's
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A mixture of neon and carbon dioxide gases at a total pressure of 663 mm hg contains neon at a partial pressure of 190 mm hg. if the gas mixture contains 1.73 grams of neon, how many grams of carbon d
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