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Does anyone have the answers for Chemistry B Semester Exam? =)

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13 answers
  1. I don't even have the questions!

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    DrBob222
  2. 1) Example Bond Energies of Ionic Compounds
    Li–F = 1036 kJ/mol
    Li-Br = 807 kJ/mol
    Na-F= 923 kJ/mol
    Na-Br = 747 kJ/mol
    Given the general trend with bond energies, which of the compounds would have the smallest bond energy?

    (1 point)

    A.Cs-Br
    B. K-Br
    C. Cs-F
    D. K-F

    2) Based on the differences in electronegativities, with which atom is francium (Fr) most likely to form an ionic bond?(1 point)

    A. Fr–I = 1.96
    B. Fr–Se = 1.76
    C. Fr–Cl = 2.46
    D. Fr–At = 1.50

    3) Which statement is the best description of the energy found in molecules of water? (1 point)

    A. A molecule's temperature is not connected to its energy.
    B. Colder molecules have more thermal energy.
    C. Colder molecules have more kinetic energy.
    D. Hotter molecules have more kinetic energy.

    4) When potassium permanganate and glycerol react, the potential energy of the products is less than the potential energy of the reactants. Which statement about this reaction is correct?(1 point)

    A. The activation energy of the system is negative.
    B. The reaction is endothermic
    C. The reaction is exothermic.
    D. The total potential energy of the system is constant.

    4) Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement must be true of the reaction?(1 point)

    A. The bond energy used to break the bonds in hydrochloric acid and sodium hydroxide is less than the energy released to form the bonds in water and sodium chloride.
    B. The total bond energy of water and sodium chloride is greater than the total bond energy of hydrochloric acid and sodium hydroxide.
    C. More bond energy is absorbed on the reactants side than is released on the products side.
    D. The energy of each bond in water and sodium chloride is greater than the energy of each bond in hydrochloric acid and sodium hydroxide.
    The energy of each bond in water and sodium chloride is greater than the energy of each bond in hydrochloric acid and sodium hydroxide.

    5) Imagine a graph. The x-axis is labeled "Time" and is measured in seconds, and the y-axis is labeled "Potential Energy" and is measured in kilojoules. The slope starts at 0 seconds with a plateau at 25 kJ. This plateau is labeled "Reactants." The slope then rises to a peak labeled "Activation Energy" at 78 kJ. Finally the slope drops to a plateau at 14 kJ and is labeled "Products."

    A. an exothermic reaction
    B. a phase change graph
    C. rate of Reaction graph
    D. an endothermic reaction

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  3. Has anybody found the answers for this yet?

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  4. Did anyone get the answers?

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  5. Does anybody have them??

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  6. 1. Cs-Br
    2. Fr–Cl = 2.46
    3.Hotter molecules have more kinetic energy.
    4.The reaction is exothermic.
    5. More bond energy is absorbed on the reactants side than is released on the products side.
    6. an exothermic reaction
    7. Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.
    8. Heat must be released by the products in order to convert from the reactants.
    9. Cooling a purple solution will turn it pink.
    10. Both are flexible, but one conducts electricity while the other insulates.
    11. high pressure, high temperature water extraction
    12. reducing environmental impact
    13. 15
    14. The number of atoms, type of elements, and mass of reactants and products are equal.
    15. 64 grams
    16. 1.503×1023
    17. The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same.
    18. Fission is a process in which a large nucleus is split into smaller nuclei.
    19. beta-minus decay
    20. alpha decay
    21. Greenhouse gases have more than two atoms, allowing them to vibrate and release radiation, warming the atmosphere.
    22. cause: acid rain
    consequence: destruction of crops
    23. toxic bacteria in the water supply
    24. It reaches hard to get to oil and gas deposits.

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  7. brion has all the right answers

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  8. Does anyone have the answers for Chemistry pre-ap semester exam?

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  9. brion is right :) 100%

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  10. Brion is 100%

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  11. Does any body know the new chemistry B semester exam for connecxus

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  12. brion.... THANK YOU they are still right!!

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  13. got 24/24 with brion

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