Morgan

Popular questions and responses by Morgan
  1. chemistry

    2C2H2(g) + 5O2(g)→4CO2(g) + 2H2O(g) a. Determine the enthalpy change for the reaction. ΔH = (4(-393.5)+ 2(-241.8)) – (2(227) + 5(0)) The enthalpy change is -2511.6. b. Determine the entropy change for the reaction. ΔS = (4(213.7)+ 2(188.7)) –

    asked on January 31, 2015
  2. Chemistry

    Which of the following is an example of quantization? A. The amount of time spent in a classroom B. The number of students in a classroom C. Learning happening in a classroom D. The temperature range in a classroom What is the definition of quantization

    asked on December 12, 2014
  3. Physics

    A student holds a bike wheel and starts it spinning with an initial angular speed of 7.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10-s period following the inital spin, the bike wheel undergoes 60.0

    asked on October 31, 2016
  4. chem please help

    What characteristic best describes the low entropy associated with solids? A. The atoms in a solid are mostly metals. B. The atoms are held together with strong bonds. C. The atoms are arranged in a rigid structure. D. The solid has a high specific heat

    asked on November 23, 2014
  5. chemistry due soon

    Which reaction shows that the enthalpy of formation of CS2 is Hf = 89.4 kJ/mol? A. C(s) + 2S(s) CS2(l) + 89.4 kJ B. C(s) + 2S(s) + 89.4 kJ CS2(l) C. C(s) + 2S(s) + 89.4 kJ CS2(l) + 89.4 kJ D. C(s) + 2S(s) CS2(l) I think the answer is a or b

    asked on November 7, 2014
  6. math

    A student is given a reading list of ten books from which he must select four for an outside reading requirement. In how many ways can he make his selections?

    asked on February 29, 2020
  7. Chemistry

    The balanced net ionic equation resulting from addition of aqueous hydrochloric acid to solid chromium(III) hydroxide is: A. Cr(OH)3 (s) + 3 HCl (aq) 3 H2O (l) + CrCl3 (aq) B. Cr(OH)3 (s) + 3 Cl- (aq) 3 OH- (l) + CrCl3 (aq) C. Cr(OH)3 (s) + 3 H+ (aq) + 3

    asked on February 20, 2015
  8. chemistry

    What is the entropy change associated with the chemical reaction that occurs when iron oxide is converted to its metal form? Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g) A. Zero B. Positive C. Negative D. Cannot be determined I think the answer is b or c.

    asked on December 9, 2014
  9. chem please help drbob222

    why can't gravimetric analysis be used to determine the concentration of sodium nitrate (NaNO) in a solution? I think the answer is because NaNO dissolves in water. Am I correct

    asked on December 2, 2014
  10. chemistry

    The figure shows a cube of air at pressure 1.0 atm above a hot surface on Earth. Contact with the hot surface causes the volume of the air to expand from 2.00 × 105 L to 2.20 × 105 L by the transfer of 8.2 × 106 J of heat. Assume the systems are

    asked on January 31, 2015
  11. chemistry

    A. What is the standard potential, in volts, of a galvanic cell made of Ce4+ and Cu2+, given the standard reduction potentials below? Ce4+ + e− → Ce3+ Eº = 1.61 V Cu2+ + 2e− → Cu(s) Eº = 0.34 V I think it is 1.27 V but it might be 1.95V b. How

    asked on January 17, 2015
  12. spanish

    Juan oye _____ su perro Spot. Would I use a personal a in the blank or leave it as it is.

    asked on December 7, 2014
  13. chemistry

    a) Describe how to determine if a reaction will be thermodynamically favorable. b) Describe what happens to the Gibbs Free Energy term when a chemical reaction is reversed. c) Describe how coupling reactions are used to drive an unfavorable chemical

    asked on March 12, 2015
  14. Chemistry

    Which of the following affects how strongly anions and cations are attracted to each other in a solid? A. The nucleus B. Empty valence orbitals C. Distance between anions and cations D. Neutrons I the answer b.

    asked on December 16, 2014
  15. chemistry

    Which statement best describes what must occur for two atoms to combine to form a chemical bond? A. The electrons of one nucleus must transfer to the nucleus of the second atom for a chemical bond to form. B. The repulsive forces of both nuclei must

    asked on December 15, 2014
  16. Chemistry

    A galvanic (voltaic) cell consists of an electrode composed of aluminum in a 1.0 M aluminum ion solution and another electrode composed of fold in a 1.0 M gold (III) ion solution connected by a salt bridge. Calculate the standard potential for this cell at

    asked on October 9, 2012
  17. chemistry

    The enthalpy of formation of C2H5OH is -238.7 kJ/mol. What information does this reveal about the bonds in the molecule? A. Bond formation in C2H5OH from its elements only occurs in cold temperatures. B. Bond formation in C2H5OH from its elements does not

    asked on December 9, 2014
  18. Chemistry

    Answer the following questions about energy changes associated with heating and cooling a substance. Use the quantities in the table for your calculations. (table) Specific heat of water /4.184J/g*K dealta H vap for water /40.7 kJ/mol dealta H fus for

    asked on January 31, 2015
  19. Chemistry

    If ammonia is manufactured at 356 K, is the reaction spontaneous, given that the enthalpy and entropy change for the reaction are -93 kJ/mol and -198 J/mol K, respectively? A. Yes, the ΔG is -92 kJ/mol. B. No, the ΔG is 92 kJ/mol. C. No, the ΔG is 22.5

    asked on December 6, 2014
  20. Chemistry

    The reason that nonpolar oil will not dissolve in polar water is that the attractive forces between: A. the oil molecules are ionic and the attractive forces between the water molecules are covalent. B. the water molecules are weaker than the attractive

    asked on March 13, 2015
  21. chemistry

    1. Write the electron configuration for each atom or ion. Then explain the distribution of electrons among energy levels. Ca, Be2+, and Br- I already found the electron configurations but I don't understand the second part of the question.(Then explain the

    asked on February 3, 2015
  22. chemistry

    What is the strongest intermolecular force that occurs between carbon dioxide molecules? A. London dispersion forces B. Hydrogen bond C. Covalent bond D. Dipole-induced dipole attractions I think the answer is D but I am not sure

    asked on March 13, 2015
  23. chemistry

    Calculate the change in enthalpy produced by dissolving 14.3 g of NaOH in 65.0 g of water if the temperature increases 49.1°C and the specific heat of water is 4.18 J/g°C I believe you multiply 4.18, 65.0, and 49.1. Am I correct

    asked on February 16, 2015
  24. Chemistry

    Which of the following is an example of quantization? A. The amount of time spent in a classroom B. The number of students in a classroom C. Learning happening in a classroom D. The temperature range in a classroom I know I asked this question but I would

    asked on December 14, 2014
  25. chemistry

    A sodium atom when excited gives off two very specific wavelengths of visible light. What does this tell us about sodium? A. There are two principal electron transitions in sodium. B. There are two electrons in a sodium atom. C. A sodium atom has its

    asked on December 12, 2014
  26. Chemistry due soon

    If the following reaction: NO(g) + 1/2O2(g) NO2(g) has the following enthalpy change: H° = -56 kJ/mol What is the enthalpy of the decomposition reaction of 2 moles of NO2? A. 112 kJ B. 56 kJ C. -56 kJ D. -112 kJ i think the answer is d

    asked on November 7, 2014
  27. chemistry

    If BH3 formed the trigonal planar molecule shown in the image below, which statement would best describe BH3? A. Boron does not contain a complete octet of electrons. B. BH3 would orient in an electric field. C. BH3 is a polar molecule. D. BH3 forms four

    asked on February 18, 2015
  28. Chemistry

    I need to make an Orbital diagram for Li2O. Could you help me find a helpful website or something?

    asked on February 11, 2015
  29. Chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

    asked on January 31, 2015
  30. Chemistry

    Which of the following are excited in ultraviolet photoelectron spectroscopy? A. Valence electrons B. Core electrons C. X-rays

    asked on January 28, 2015
  31. Chemistry

    Which of the following is not true about molecular orbital theory? A. The bonding molecular orbital is filled before the antibonding orbital. B. Each molecular orbital can accommodate only one electron. C. The number of molecular orbitals formed is often

    asked on December 16, 2014
  32. chemistry

    What does the fact that a blackbody can absorb light only in specific-sized "packets" say about light? A. It has no mass. B. It is composed of electrons. C. It is composed of atoms. D. It is quantized. I have no idea what the answer is

    asked on December 11, 2014
  33. chemistry

    When 3.2 g of ammonium chloride is dissolved in 75 g of water, the temperature of the solution decreases from 22.8°C to 20.1°C. What is the energy of dissolution of NH4Cl per mole? (The molecular mass of NH4Cl = 53.49 g/mol, and the specific heat of

    asked on December 11, 2014
  34. chemistry

    A sample of nickel is heated to 95.0°C and placed in a coffee-cup calorimeter. If the 50.0 g of water in the calorimeter is initially 22.3°C and warms to 25.4°C, what mass of nickel was heated? (The specific heat of nickel is 0.444 J/°C g and water is

    asked on December 10, 2014
  35. Easy Chemistry

    Which of the following processes uses a galvanic cell? A. Electroplating silver metal onto a teapot B. Purification of metals such as copper from their metal ores C. Electrolysis of sodium chloride D. Operation of a portable music player

    asked on October 20, 2014
  36. Science

    Starting from rest, a boulder rolls down a hill with constant acceleration and travels 3.00 during the first second. How far does it travel during the second second? How fast is it moving at the end of the first second? How fast is it moving at the end of

    asked on September 19, 2006
  37. Chemistry

    Use this reaction for this question: 4NH3 (g) + 2O2 (g) 4NO (g) + 6H2 (g); H = -905 J. Which statement is true about the reaction above? A. G is negative at all temperatures. B. S is negative and G is positive. C. S is negative and G is negative. D. G is

    asked on February 20, 2015
  38. Chemistry

    You want to determine the heat of reaction when a sodium chloride solution is formed using a 10.0 g sample of NaCl(s) and 50.0 mL of water in a coffee cup calorimeter. Which of the following equations would you use? Assume the specific heat of the solution

    asked on February 18, 2015
  39. Chemistry

    How can the atomic orbital be described in the quantum mechanical wave model of the orbitals? A. A collection of balloons B. A circular ring C. A probability density

    asked on January 28, 2015
  40. chemistry

    Which statement describes the principal quantum number (n)? A. The quantum number that indicates the subshell occupied by an electron B. The quantum number that indicates the energy level of the electron C. A subdivision of an energy level in an atom D.

    asked on December 11, 2014
  41. Chemistry

    When 3.2 g of ammonium chloride is dissolved in 75 g of water, the temperature of the solution decreases from 22.8°C to 20.1°C. What is the energy of dissolution of NH4Cl per mole? (The molecular mass of NH4Cl = 53.49 g/mol, and the specific heat of

    asked on December 10, 2014
  42. chem please help

    In the reaction AgNO3(aq) + HCl(aq) AgCl(s) + HNO3(aq) + heat, when 0.70 mole of AgNO3 and 0.70 mole of HCl react, the temperature of 50 g of water increases from 15°C to 30°C. If the specific heat of water is 4.18 J/g•°C, how much energy was produced

    asked on November 22, 2014
  43. Chem please help

    An object A has half the mass and twice the velocity of object B. How are the kinetic energies of A and B related? A. The kinetic energy of B is 4 times that of A. B. The kinetic energy of B is twice that of A. C. The kinetic energy of A is the same as

    asked on November 17, 2014
  44. Chemistry

    a) A current of 1.50 Amperes passes through a solution of AgNO3 for 3.0 hours. What mass, in grams, of silver collects on the cathode? (molar mass of silver = 107.9 g/mol) b) How many seconds would it take to collect 100 g of silver to collect on the

    asked on March 5, 2015
  45. chemistry

    Given the following information about electronegativity, which binary compound would form covelant bonds with the greatest polarity? Element Electronegativity H 2.1 Li 1.0 S 2.5 Al 1.5 F 4.0 Cl 3.0 A. HCl B. LiF C. H2S D. AlH3

    asked on February 19, 2015
  46. chemistry

    Why is there a decrease in electron affinity going from lithium to sodium? A. There is a stronger nuclear charge, with no additional shielding electrons or number of shells. B. There are fewer spaces in the valence shell in which to place the added

    asked on February 18, 2015
  47. chemistry

    For an atom of sulfur, which electron would require the least amount of energy to remove from the atom? A. 3s2 B. 1s1 C. 3p1 D. 3p4 I think the answer is c or d, preferring d. What would you go with?

    asked on December 15, 2014
  48. chemistry

    A sample of nickel is heated to 95.0°C and placed in a coffee-cup calorimeter. If the 50.0 g of water in the calorimeter is initially 22.3°C and warms to 25.4°C, what mass of nickel was heated? (The specific heat of nickel is 0.444 J/°C g and water is

    asked on December 10, 2014
  49. chem please help drbob222

    Why is the process of examining enthalpies of a reaction helpful? A. It helps in determining how a reaction occurs spontaneously. B. It helps in determining the temperature that a reaction requires to proceed. C. It helps in determining how fast a reaction

    asked on November 25, 2014
  50. Easy chemistry

    Which statement correctly identifies how a lead-storage battery in a car works? A. The battery acts as a galvanic cell as it provides current to the radio. B. The battery acts as a galvanic cell as it is recharged by the alternator. C. The battery acts as

    asked on October 22, 2014
  51. Chemistry

    Carbon monoxide and chlorine gas react to form phosgene: CO(g)+Cl2(g)⇌COCl2(g) Kp = 3.10 at 700 K If a reaction mixture initially contains 319torr of CO and 220torr of Cl2, what is the mole fraction of COCl2 when equilibrium is reached?

    asked on February 16, 2014
  52. calculus

    Find the volume of the solid generated by revolving the region bounded by the graphs of the equations and/or inequalities about the indicated axis. x = y(25 − y2)^1/2 x = 0 the y-axis

    asked on February 2, 2011
  53. Physics

    The objects listed below are placed at the top of a ramp, and roll down to the bottom without slipping. Assuming that there is no air resistance, rank them in order from fastest average rolling speed to slowest. Basketball Bowling Ball Penny Wedding Ring

    asked on October 24, 2016
  54. chemistry

    In 3-4 sentences, identify how the geometric structure of NF3 is different than that of NF4+. Explain how the geometry affects the ability of the molecules to experience a dipole affect.

    asked on March 6, 2015
  55. Chemistry

    The oscillation of electrons in an antenna is an example of which type of radiation/waves/rays? A. Radio waves B. Infrared rays C. Microwaves D. VLF radiation

    asked on December 16, 2014
  56. Chemistry

    Which of the following is an example of sp3d2 hybridization? A. C2H6 B. IF7 C. PCl5 D. SF6

    asked on December 15, 2014
  57. Chemistry

    1. Sodium can be extracted by heating naturally occurring salt until it is molten. An electrochemical process is then used to extract the sodium. Cl2 is produced at the anode, and Na is collected at the cathode. A standard reduction potential graph for the

    asked on October 22, 2014
  58. math

    In a suspension bridge, the shape of the suspension cables is parabolic. The bridge shown in the figure has towers that are 400 m apart, and the lowest point of the suspension cables is 100 m below the top of the towers. Find the equation of the parabolic

    asked on October 14, 2014
  59. chemistry

    How many moles of magnesium chloride are formed when 55 mL of 0.70 M HCl is added to 42 mL of 1.204 g Mg(OH)2? Mg(OH)2(s) + 2HCl(aq) MgCl2(aq) + 2H2O(l) A. 0.019 mol B. 0.012 mol C. 0.021 mol D. 0.039 mol

    asked on October 13, 2014
  60. Physics

    The ocean's level is currently rising at about 1.5 mm per year. At this rate, in how many years will sea level be 3 meters higher than now? This seems like it should be a simple question but the change in measurements is confusing me.

    asked on September 29, 2011
  61. US history

    Make a clear, defensible claim about the topic of the text. Write a paragraph to support your claim with clear reasons and relevant evidence from the text. Senator Bernie Sanders, an independent from Vermont, ended his presidential bid on April 8. This

    asked on April 15, 2020
  62. geometry

    A news helicopter 60 meters above the road spotted two accidents. The angles of depression are 10.2° and 8.7°. How are apart are the accidents? (The accidents are in the same general direction from the helicopter.) please help. i'm not sure what i am

    asked on July 6, 2017
  63. chemistry

    Describe how to prepare 1 L of a 0.5 M solution of cobalt chloride hexahydrate (CoCl2 6H2O). Be sure to identify the labware shown above (flask and a scale), explain your reasoning, and show any calculations.

    asked on February 20, 2015
  64. chemistry

    2. Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the following macroscopic properties. a. Solubility in polar compounds (1 point) b. Brittleness (1 point) Please explain how to do

    asked on February 7, 2015
  65. chemistry

    Core electrons shield what from the pull of the nucleus? A. Valence electrons B. Neutrons C. Protons I think the answer is a

    asked on January 28, 2015
  66. Chemistry

    What does the photoelectric effect show about the connection between light and electrons? A. Light can remove electrons from atoms. B. Electrons are composed of light. C. Light is composed of electrons. D. It takes 2 photons of light to cause 1 electron to

    asked on December 12, 2014
  67. chemistry

    What is the difference between the ionization energy of inner-shell electrons and the ionization energy of outer-shell electrons? A. The ionization energy of inner-shell electrons is less than the ionization energy of outer-shell electrons. B. They are

    asked on December 12, 2014
  68. chemistry

    What is ΔH in the equation ΔG = ΔH - TΔS? A. The change in specific heat between the products and the reactants B. The change in enthalpy between products and reactants in a reaction C. The change in entropy between products and reactants in a reaction

    asked on November 25, 2014
  69. Accounting

    An example of a committed fixed cost would be: a) taxes on real estate b) management development programs c) public relations d) advertising programs

    asked on February 23, 2014
  70. Math

    A pizza is cut into 12 pieces. Describe the steps you would take to find the area of one slice of the pizza.....Help?!

    asked on August 9, 2011
  71. Math ASAP

    Order the numbers from least to greatest. 0.21, 1/5, 0.18, 24% a. 0.21, 1/5, 0.18, 24% b. 24%, 0.21, 1/5, 0.18 c. 0.18, 1/5, 0.21, 24% d. 1/5, 0.18, 0.21, 24% ** Am I right? I don't know. Please help! Thanks so much!

    asked on January 11, 2016
  72. Chemistry

    A 2.75 kg block of ice is heated until it completely melts. It is then heated again until it completely changes to water vapor. Is more energy required to melt the ice or to vaporize the liquid water.

    asked on January 29, 2015
  73. chemistry

    How is a spectrum obtained in NMR spectroscopy? A. Low-frequency radio waves bombard the atom and cause nuclei in a low spin state to move to a higher spin state. B. High-frequency ultraviolet rays bombard the atom and cause nuclei in a high spin state to

    asked on January 28, 2015
  74. chemistry

    Which of the following spectroscopies is/are suitable for studying materials on surfaces? A. IR and UV/V B. UV/V C. NMR D. XPS and UPS

    asked on December 15, 2014
  75. Chemistry

    Which electron would have the highest ionization energy for an oxygen atom? A. 2nd B. 1st C. 5th D. 6th If it is the highest I was guessing b or d.

    asked on December 15, 2014
  76. chemistry

    In which unit is the wavelength of an electromagnetic wave commonly measured? A. J B. nm C. s–1 D. kg All most positive it is b but I just wanted to make sure.

    asked on December 12, 2014
  77. Chemistry

    All electromagnetic energy (light), including gamma rays through radio waves, has what in common? A. Speed B. Wavelength C. Frequency D. Energy E. Amplitude I think a

    asked on December 11, 2014
  78. Chemistry

    Core electrons shield what from the pull of the nucleus? A. Identical electrons B. Valence electrons C. Neutrons D. Protons I was thinking d or a.

    asked on December 11, 2014
  79. Chem please help

    Which of the following will have the most freely moving particles within it? A. Water at 100°C B. Water at 0°C C. Ice at 0°C D. Steam at 100°C I think the answer is a or d; however, I am favoring d.

    asked on November 17, 2014
  80. AP Chemistry

    Which of the following statements is true regarding two points within a system? A. They will have different types of particles. B. They cannot interact with each other. C. They have different boundaries. D. They have the same internal energy. Im think the

    asked on November 17, 2014
  81. math

    Write the first six terms of the arithmetic sequence with the given properties. a = 3, d = 2 a. 3,8,13,18,23,28 b. 3,5,7,9,11,13 c. 3,6,8,10,12,14 d. 2,7,12,17,22,27 e. 2,4,6,8,10,12

    asked on October 1, 2014
  82. Chemistry

    What is the CHANGE in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2? The Ka for acetic acid is 1.8 x 10-5.

    asked on March 13, 2012
  83. statistics

    Consider a 90% confidence interval for μ. Assume σ is not known. For which sample size n=10 or n=20, is the confidence interval longer?

    asked on October 31, 2011
  84. Stats (probability)

    Of 10 girls in a class, 3 have blue eyes. If two girls are chosen at random, what is the probability that (i) both have blue eyes, (ii) neither has blue eyes, (iii) at least one has blue eyes? I have the answers but do not know how to get them. I'm trying

    asked on March 16, 2011
  85. math

    In how many ways can an investor select five mutual funds for his investment portfolio from a recommended list of nine mutual funds?

    asked on February 29, 2020
  86. Math

    Grade 7 students were surveyed to determine how many hours a day they spent, on average, doing various activities. The results are shown in the circle graph. About how much time do seventh-graders spend at school and eating combined? Round answers to the

    asked on August 12, 2019
  87. Chemistry

    For the following stoichiometry problem, select ALL of the mole definitions you would need to solve the problem. Problem: Given the following equation: 2NaClO3 --> 2NaCl + 3O2 How many grams of sodium chloride, NaCl, are produced when 80.0 liters of oxygen

    asked on May 24, 2019
  88. Math

    ABCD is a kite with AD=AB Angle A is 116 degrees Angle B is 2x degrees Angle D is (5x-147) degrees Find the smallest angle of the kite

    asked on January 13, 2017
  89. Chemistry

    Lets say you melted palmitic acid, paraffin, and sucrose. While they be good conductors, poor conductors, or will they not be able to conduct electricity.

    asked on February 25, 2015
  90. chemistry

    A particular photon has a wavelength of approximately 2 x 10-7m. What is the energy, in joules, associated with this photon? A. More information is needed. B. 4 x 10-32 C. 1 x 10-18 D. 1 x 1018 E. 1.5 x 1015

    asked on February 20, 2015
  91. chemistry

    2. Create a visual representation of ionic substances to connect the microscopic structure of ionic substances to each of the following macroscopic properties. a. Solubility in polar compounds (1 point) b. Brittleness (1 point)

    asked on February 6, 2015
  92. chemistry

    I am having some chemistry problems. 3. The graph compares the 1s orbital energies for the F atom (Z = 9), the Ne+ ion (Z = 10), and the Na++ ion (Z = 11). (the graph shows F having an Orbital Energy of 692.45, Ne+ with 47.74, and Na++ with 33.52) a. How

    asked on February 3, 2015
  93. chemistry

    3. One problem the researchers faced was an uncertainty about whether the signals observed in certain mass spectrometry data were, in fact, due to lead isotopes. Explain why this was a problem. In other words, why wasn't information about the mass of the

    asked on January 25, 2015
  94. Chemistry

    1. Why can’t gravimetric analysis be used to determine the concentration of sodium nitrate (NaNO) in a solution? 2. Why is it important in gravimetric analysis to add an excess amount of precipitating ions to a solution containing an analyte? 3. Relate

    asked on January 17, 2015
  95. chemistry

    Which of the following is an example of quantization? A. The amount of time spent in a classroom B. The number of students in a classroom C. Learning happening in a classroom D. The temperature range in a classroom I strongly believe the answer is A. Any

    asked on December 14, 2014
  96. chemistry

    What does electron affinity depend on? A. Both the effective nuclear charge and the number of shells in the atom containing electrons B. Attraction between the protons and neutrons C. Only the effective nuclear charge D. Attraction between the valence

    asked on December 11, 2014
  97. chem please help drbob222

    What will be the result of a reaction if its enthalpy change is positive, its entropy change is negative and Gibbs free energy is positive? A. Spontaneous, if the temperature is high B. Nonspontaneous, if the temperature is low C. Always spontaneous D.

    asked on November 26, 2014
  98. chem please help drbob222

    Two objects A and B have the same mass and the same specific heat. Object A is heated from 30°C to 70°C and object B is cooled from 70°C to 30°C. How are the thermal energies of the two objects related after the temperature change has occurred? A. The

    asked on November 22, 2014
  99. Chemistry

    3. An electrochemical reaction occurs between an unknown element and zinc. The half-cell reaction for the zinc is: Zn(s) → Zn2+(aq) + 2e− The cell potential for the reaction is Eºcell = 1.83 V. a. Is the reaction spontaneous or nonspontaneous?

    asked on October 22, 2014
  100. Easy Chemistry

    What is the oxidation half-reaction for Mg(s) + ZnCl2(aq) MgCl2(aq) + Zn(s)? A. Zn(s) Zn2+ + 2e- B. Zn2+ + 2e- Zn(s) C. Mg(s) Mg2+ + 2e- D. Mg2+ + 2e- Mg(s)

    asked on October 20, 2014

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