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Draw the structures of the two carbocation intermediates that might form during the reaction of 1-methylcyclopentene (above) with hbr.
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Be sure to answer all parts. what is the poh of 2.80 m ba(oh)2 solution? is the solution neutral, acidic, or basic? the poh of the solution is:
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Use the method of initial rates with the data in table 3.4 to determine the reaction order for naoh.
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The following equation shows the formation of water (H2O, 18.02 g/mol) from hydrogen (H2, 2.02 g/mol) and oxygen (O2, 32.00 g/mol): how many grams of water will form if 10.54 g H2 react with 95.10 g O
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A mixture is two or more substances that are mixed together but not chemically combined. The substances in a mixture each keep their own properties and can be separated from the mixture. Identify the
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Hydrogen gas and bromine vapor react to form gaseous hydrogen bromide at 1300 K. The value of the equilibrium constant is 1.6 x 105. What is the value of the equilbrium constant for the decomposition
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Josh decided to mix some vinegar with baking soda. He knew that a reaction occurred because he made careful observations. He noted that the mixture started to foam up and bubble and was white in color
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Why do you heat the empty crucible?1. To thermally decompose barium chloride dihydrate2. To prevent the water loss from barium chloride dihydrate3. To flame polish the crucible4. To prevent it from cr
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Given the balanced equation 3H2(g)+N2(g)=2NH3(g), calculate the mass of NH3 produced by the complete reaction of 2.55g of H2
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25 moles of nocl were placed in a 2.50 l reaction chamber at 427ºc. after equilibrium was reached, 1.10 moles of nocl remained. calculate the equilibrium constant, kc, for the reaction 2nocl(g) 2no(g
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If the initial concentrations of the reactants are both 2.70 m , what is the ratio of the rate of reaction a to the rate of reaction b?
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A solution contains 0.133 g of dissolved Lead. How many moles of soduim chloride must be added to the solution to completly precipitate all of the disolved lead?
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Looking across period 4 of the periodic table, potassium (atomic number 19) is followed by calcium (atomic number 20), which is followed by scandium (atomic number 21). Which element should have the l
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Water does not easily remove grease from dishes or hands because grease is nonpolar and water is polar. the addition of soap to water, however, allows the grease to dissolve. look at the structure of
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Part a: What volume of 10.0 M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? answer : 6.7ml Part B: The buffer from Part A is diluted to 1.00 L. To half of it (500. mL
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What is one reason why rock layers are not horizontal? A) they were formed at and angle B) a force pushed the rock layers after they were formed C)they were formed vertically D)the area was once cov
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You need to produce a buffer solution that has a ph of 5.42. you already have a solution that contains 10. mmol (millimoles) of acetic acid. how many millimoles of acetate (the conjugate base of aceti
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When heated, calcium carbonate decomposes to yield calcium oxide and carbon dioxide gas via the reaction caco3(s)→cao(s)+co2(g) how many grams of calcium carbonate are needed to produce 33.0 l of ca
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The concentrations of the products at equilibrium are [pcl3] = 0.170 m, and [cl2] = 0.150 m. what is the concentration of the reactant, pcl5, at equilibrium?
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More strong base is added until the equivalence point is reached. what is the ph of this solution at the equivalence point if the total volume is 30.0 ml ?
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How many grams of dry nh4cl need to be added to 2.50 l of a 0.200 m solution of ammonia, nh3, to prepare a buffer solution that has a ph of 8.51? kb for ammonia is 1.8×10−5.\?
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A 50.0-g sample of liquid water at 25.0 °c is heated by the addition of 73.5 j of energy. the final temperature of the water is ________ °c. the specific heat capacity of liquid water is 4.18 j/g-k.
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A solution of H2SO4(aq) with a molal concentration of 5.25 m has a density of 1.266 g/mL. What is the molar concentration of this solution?
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When the following equation is balanced with the lowest whole number coefficients possible, what is the coefficient in front of O2
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A generic salt, AB, has a molar mass of 299 g/mol and a solubility of 7.40 g/L at 25 °C. What is the Ksp of this salt at 25 °C?
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Calculate the percentage by mass of NaCl in a solution that contains 233 grams of salt in a solution having a mass of 1235 g
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Which of the following indicates that an exothermic reaction has occurred? Temperature increases Heat is absorbed Salt is produced Water is formed
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Butanone undergoes a nucleophilic addition with a grignard reagent made from 1-bromopropane and magnesium metal in thf solution. the alkoxide formed from the nucleophilic addition is then conveted int
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Photosynthesis is an example of an exothermic chemical reaction in which plants use sunlight to make glucose and oxygen. Please select the best answer from the choices provided T
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Complete and balance each of the following equations for combustion reactions. C4H6(g)+O2(g) (right arrow) C(s)+O2(g) (right arrow) CS2(s)+O2(g) (right arrow) C3H8O(l)+O2(g) (right arrow)
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Which of the following expands to fill the container it is in, but can be compressed to a smaller volume when pressure is applied
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How much energy is released when 16.5 g of steam is condensed at 100oC? Hv = 2260 J /g. Question 4 options: -37290 J -3729 J -136 J -13 KJ
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Describe what happens to the temperature, the volume, and the phase composition (number of moles present)
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Potassium iodate solution was prepared by dissolving 1.022 g of KIO3 (FM 214.00) in a 500 mL volumetric fask.Then 50.00 mL of the solution were pipetted into a flask and treated with excess KI (2g) an
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Write a balanced equation for the displacement of oxygen from hbo2 by co to produce hbco. write the equilibrium constant expression for your overall reaction
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HELP As you move up the food web, the amount of energy available to the organisms decreases, explain why this happens.
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The volume of a gas is 450ml when it’s pressure is 1.00atm. If the temperature of the gas does not change, what is the pressure temperature when it’s volume is changed to 2.00l?
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C2H4(g) + H2(g) mc009-1.jpg C2H6(g) + 137 kJ What happens to the amount of ethane (C2H6) when the temperature of the system is increased? The amount of ethane decreases. The amount of ethane increases
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Different kinds of lenses are used in eyeglasses to help people with eye conditions. Farsightedness is an eye condition in which distant objects appear clear but close objects appear blurry. Nearsight
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What percent by mass of ammonium sulfate is nitrogen?
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Which one of the following statements is correct? A. Metalloids have a full valence shell of electrons. B. Nonmetals tend to gain electrons when they react. C. Noble gases easily gain electrons to rea
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The graph below shows how solubility changes with temperature. mc022-1.jpg What is the solubility of Na2HAsO4 at 60°C? 20 g/100 mL of water 46 g/100 mL of water 65 g/100 mL of water 70 g/100 mL of wa
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Explain three ways that a river reshapes Earth’s land surface. Be sure to explain how erosion, weathering, or deposition of rock or soil contribute to the change.
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According to the brønsted-lowry theory, which of these acids would have the weakest conjugate base?
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A plot of pressure (mmHg) versus 1/v(mL^-1) using the data collected in the lab produced a linear relationship. The equation that best represents the data is y=43,560x+118.30. Predict the pressure of
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Calculate the change in pH when 7.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
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Complete and balance the molecular equation, including phases, for the reaction of aqueous copper(II) chloride, CuCl2, and aqueous potassium phosphate, K3PO4.
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15) A solution contains 35 grams of KNO3 dissolved in 100 grams of water at 40°C. How much more KNO3 would have to be added to make it a saturated solution?
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What are the concentrations of ohâ and h in a 0.00088 m solution of ba(oh)2 at 25 °c? assume complete dissociation?
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The critical resolved shear stress for a metal is 30 mpa. determine the maximum possible yield strength (in mpa) for a single crystal of this metal that is pulled in tension.
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