chemistry! URGENT

61,546 results, page 77

  1. Chemistry

    Arrange the species O2, O2^+, O2^-, and O2^2- in order of increasing O-O bond length.
  2. chemistry

    Arrange the species O2, O2^+, O2^-, and O2^2- in order of increasing O-O bond length.
  3. Chemistry

    Hoe Many moles of each reactant are Needed to produce 3.60 x 10^2g CH3OH?
  4. chemistry

    If 29.0 mL of 0.10 M Ba(NO3)2 are added to 76.0 mL of 0.21 M Na2CO3, will BaCO3 precipitate? Calculate Q
  5. Chemistry

    What is the ph of the final solution when 10 mL of HCl is completely neutralized with 11mL of 0.1M Na(OH)?
  6. chemistry

    how much energy is needed to melt 25.4 g of I2 if enthalpy fusion of I2 is 61.7 J/g
  7. chemistry

    Write the expression for Kc and Kp for the reaction PH3BCl3(s) <==> PH3(g) + BCl3(g)
  8. AP CHEMISTRY

    SOMEONE PLEASEEEEEEEEE ANSWER MY PROBLEM IN THE POST BELOW!!!!!!!!!!!!!!!!!!!!!!!!!!!
  9. AP CHEMISTRY

    i asked another question in my post below pleaseeeeeeeee answer it.. THANX!!!!!!!
  10. Chemistry

    How would you analyze a solution known to contain Hg22+ and Cu2+?
  11. Chemistry

    Why is a small amount of solute added in the electrolysis of water?
  12. chemistry

    how can you find the amount of moles of 50 microliters of 18M H2SO4?
  13. chemistry

    what are the solute particles present in boric acid (H3BO3)?
  14. Chemistry

    List active metals that can be extracted from their compounds by electrolysis.
  15. Chemistry

    How many moles are found in 25 grams of hydrogen chloride gas
  16. chemistry

    How can a liquid, soda, contain a gas, carbon dioxide?
  17. Chemistry

    balance this equation NaOH + H2SO4 = NaSO4 + H2O
  18. chemistry

    Lab report of cations and anions by there precipitate form
  19. chemistry

    how much heat does it take to raise the temperature of 0.10 kg of gold bt 25 C?
  20. chemistry

    how much heat does it take to raise the temperature of 0.10 kg of gold bt 25 C?
  21. Chemistry colloidExamples...

    give me 15 examples for colloid from the drinks that we use
  22. Chemistry

    How much heat is required to warm 1.50 kg of sand from 20.0 C to 100.0 C?
  23. chemistry

    Calculate the pH of a 0.87 M NaCN solution. Solve it exactly (no assume x=0.1)
  24. Chemistry

    What is initial concentration of a sodium acetate if the pH (at epuilibrium) is measured to be 9.30?
  25. chemistry

    Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH
  26. chemistry

    Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH
  27. chemistry

    will SrSO4 precipitate when .1g of Na2SO4 are added to 1L of a .01M solution of Sr
  28. chemistry

    are compressive strength and brittle the same thing..if not then what is the difference?
  29. Chemistry

    Can you label all the functional groups of the Sucrose Molecule?
  30. Chemistry

    Calculate the concentration of the hydronium ion([H3Ol+]) for a solution with the pH = 4.5
  31. Chemistry

    Calculate the concentration of all species in a 0.240 solution.
  32. Chemistry

    Calculate the ratio of NaF to HF required to create a buffer with a pH of 4.00.
  33. Chemistry

    How does looking at phases of products and reactants show the Estamation of ÄS?
  34. chemistry

    How many grams of solute are present in 785 mL of 0.480 M KBr?
  35. chemistry

    pH of HF 5.3*10^-2 M Since HF is a weak acid, I'm not sure which formula to use.
  36. organic chemistry

    how to filter when a compound recrystallize at zero degree
  37. chemistry

    what mass of H2(g) is produced from the reaction of 5.2g Fe(s) with excess hydrochloric acid?
  38. chemistry

    a 0,25M solution of a week acid is 3% dissociated.calculate ka
  39. Chemistry PLZ HELP!!!!!

    what do we mean when we describe a molecule as being polar?
  40. Chemistry PLZ HELP!!!!!

    how are intermolecular forces different from chemical bonds?
  41. chemistry

    What is the mass percent of oxygen in sodium bicarbonate (NaHCOÀ)?
  42. Chemistry PLZ HELP!!!!!

    Differentiate between oxide, a peroxide, and a superoxide?
  43. organic chemistry

    what happens to so3 when placedat high temp?
  44. Chemistry

    What is the boiling point of ethanol when the atmospheric pressure is 60kPa?
  45. Genral Chemistry

    What are the pOH and pH of a 0.0125M solution of potassium KOH
  46. chemistry

    What is the mass of 4.75 mol of the element iron (Fe)? Answer in units of g
  47. chemistry

    What is the percent yield if 23.5 of ethyl chloride is actually formed?
  48. AP Chemistry

    What is the pH of a .20M HA solution (Ka=1.0x10^-6) that contains a 0.40M NaA?
  49. chemistry

    If 3.0 mol of O2 has a volume of 26.0 L at a pressure of 1.6 atm, what is its temperature in kelvins?
  50. chemistry

    how many grams of magnesium carbonate are in a sample that has 1.58 x 10^24 oxygen atoms?
  51. chemistry

    What is the final volume V2 in milliliters when 0.600 L of a 40.9 % (m/v) solution is diluted to 20.1 % (m/v)?
  52. Chemistry

    Now how many grams of o(2) are needed to produce 1.48x10^24 molecules of co(2)
  53. Chemistry

    Which group of elements is most likely to not form ions?
  54. chemistry

    If 27.3 g of NaNO3 are needed, what volume of a 5.78 % w/v solution will provide this mass?
  55. Chemistry

    In a 0.05M solution of a weak monoprotic acid,[H+]=.0018.What is its Ka?
  56. chemistry

    Write ksp for ba3(po4)2 in an aqueous solution
  57. Chemistry

    Why can some borax also dissolve at room temperature?
  58. chemistry

    For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)
  59. chemistry

    For the strong acid solution 9.7×10−3 , determine (H3o+)and (OH-)
  60. chemistry

    how much heat is needed to convert 30 g of water at 10 C to 110 C
  61. chemistry

    Why are hydrogen ions NEVER found in an aqueous solution?
  62. CHEMISTRY

    Is CF4 an example of a central atom with an expanded octet?
  63. Chemistry

    Please help! I need to calculate the enthalpy change of the POCL3.
  64. Chemistry

    How do I identify the reducing agent in a reaction of magnesium with oxygen?
  65. chemistry

    the particles protons and neutrons present in atomic nucleus are known as......
  66. chemistry

    what is reason for the different atomic masses of the isotopes of an element
  67. Chemistry

    How many moles of methanol are dissolved in 1.5 L of water to make a 2.0 m solution?
  68. Chemistry

    How many moles of K atoms are there in 152.8247 grams of KMnO4?
  69. AP CHEMISTRY

    What does a negative value for a standard potential indicate? PLEASE HELP!!
  70. Chemistry

    how many grams of aluminum sulfate are produced if 23.33 g Al reacts with 74.44 G CuSO4
  71. Chemistry

    Give the major ideas of the kinetic molecular theory.
  72. chemistry / help please

    What is the name of: ZnNO3, of (NH4)2O, of Rb3PO4, or NH4ClO4?
  73. chemistry

    why does C4H10 have a higher BP than C2H6,C3H8, CH4
  74. Chemistry

    What are some chemical, extensive, and intensive properties of a pencil?
  75. Chemistry

    What is the reason that chemists chatagories Fe,Co and Ni in the same group VIIIB?
  76. chemistry

    will fe3+ oxidize Sn2+ to Sn4+ in acidic solution?
  77. Chemistry-please help!

    What is the meaning of combining power of elements and radicals?
  78. Chemistry-please help!

    What is the meaning of combining power of elements and radicals?
  79. chemistry

    What is the molality of a solution containing 7.8 g of MgCl2 in 725 g of water?
  80. chemistry

    what mass NaOH is required to react exactly with 25.0 ml of 3.0 M H2S04
  81. chemistry

    Calculate the value of Kc for 4NH3(g) + 3O2(g)= 2N2(g) + 6H2O(l)
  82. chemistry

    if 25.0g of O2 gas has a temperature of 400k and a pressure of 610 mm Hg, what is its volume?
  83. chemistry

    Kp for the reaction is 1.47 at 727°S CO2(g) + C(s) 2CO(g) Calculate Kc at this temperature
  84. chemistry

    When the following reaction is at equilibrium, which of these relationships is always true? 2 O3(g) 3 O2(g) A. [O3]2 = [O2]3 B. Kc[O2]2 = [O3]3 C. [O3] = [O2] D. Kc[O3]2 = [O2]3 E. Kc[O2]3 = [O3]2
  85. chemistry

    What is the final volume in milliliters when 0.698 of a 42.2 (m/v) solution is diluted to 21.1 (m/v)?
  86. chemistry .....please help

    Which of these temperatures is closest to 100 K? A. -173 °C B. 18 °C C. 0 °F D. 212 °F
  87. Inorganic Chemistry

    1) 5.0 mL of 6.0 x 10^-4 potassium 5.0 mL of the solution prepared above are then mixed with
  88. chemistry

    determine the number of moles of FeSO4 in sample Y that you use
  89. chemistry

    determine the concentration of Fe2+ ion the prepared solution
  90. chemistry

    How many moles of chloride ions are present in 18.4g of CaCl2? I don't know how to set this up...
  91. chemistry

    describe a prepare a 0.25 L.0.5 mol standart solution of NaoH
  92. Chemistry

    COmbination of nahco3andhcl what is before,after,mixture, and change?
  93. chemistry

    On the pH scale, any substance with a value between 8 and 14 is considered _________.
  94. chemistry

    Calculate the pH of an Aqueous 3.8 x 10^-5 M solution of barium hydroxide. I need help.
  95. chemistry

    chemical formulae which ends with ite,ate and ide
  96. chemistry

    calculate the density of a liquid if 47.9mL of it has mass of 49.06g
  97. chemistry

    How many liters is 5.8 mole of neon at STP? Show work
  98. Chemistry

    When hydrogen reacts with a metal, does it form a cation or an anion?
  99. Chemistry

    What is the density of a solution of 9.0% Calcium chloride dissolved in water?
  100. chemistry (lab)

    how or where does the hat energy produced by the candle come from ?? help me!
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