chemistry! URGENT

61,409 results, page 82

  1. chemistry

    I need to identify two terms that can be applied to electrons
  2. chemistry

    An aqueous solution at 25 °C is 10.0% HNO3 by mass and has a density of 1.051 g/mL. What is the pH?
  3. chemistry

    how many CO would be needed to reduce 19.1 grams of iron (III).
  4. chemistry

    For the reaction: 2SO2(g) + O2(g) = 2SO3(g) conducted at 25°C and 1 atm. Calculate H°, S°, G°
  5. Chemistry

    Determine the percent ionization of a 2.45 M solution of benzoic acid
  6. Chemistry

    Calculate the hydrogen ion concentration, [H+], in 0.00988 M Ba(OH)2. Careful!
  7. Chemistry

    What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?
  8. Chemistry

    What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?
  9. Chemistry

    Why are the atomic masses of elements usually decimal numbers?
  10. Chemistry

    If an element has 12 protons and 17 neutrons, how many electrons must it have?
  11. chemistry

    how many grams of CuSO4.5H2O is needed to prepare 0.01 M solution?
  12. chemistry

    What is the equation that represents the reaction of esterification of crystal violet? Thanks
  13. Chemistry

    Calculate the pH of a buffer that is 0.130M in NaHCO3 and 0.295M in Na2CO3
  14. chemistry 12u

    2NH(g) +2.5O2(g) ---><--- 2NO(g) + 3H2O(g) + Heat
  15. Chemistry

    Calculate the pH of a solution that is 0.185M in HC2H3O2 and 0.125M in KC2H3O2
  16. Chemistry

    Calculate pH of a solution that is 0.255M in CH3NH2 and 0.105M in CH3NH3Br
  17. Chemistry

    In de Broglie's equation w=wavelength w=h/mv how do i rearrange to solve for mass
  18. chemistry

    if 4.75 g of cooper and 3.20 g of sliver are available to react ,what is the limiting reactant
  19. Chemistry help please

    What type of radiation is emitted when K-38 decays into Ca-38?
  20. Chemistry

    what is the pH of a solution created by adding 15.5 g of KClO to 228 mL of 1.08 M HClO(aq).?
  21. chemistry

    hi I have a hard time understanding the following question: The
  22. chemistry

    what is the iobic equation of zinc +iron(ll)sulphate solution
  23. chemistry

    Bacl2+h2so4 white coller way to ans
  24. chemistry

    There are 5.00*10^-3 moles of lead II nitrate. Calculate how man grams this is.
  25. chemistry

    25 mL 0.4 M KOH will neutralize 10 mL 1.0 M H2SO4 solution. A) True B) False
  26. chemistry

    is trans-dibromoethene a proper way of labeling an alkene?
  27. Chemistry

    how many grams of KCIO3 can be dissolved it 50 g h20 at 50 degrees celcuis?
  28. Chemistry

    What is the mass in grams of 6.5 moles of water? could you show me how you get the answer to
  29. Chemistry

    What is the oxidation state assigned to Cr in zinc dichromate, ZnCr2O7?
  30. Chemistry

    How many grams of NaF are needed to make 50 mL of a 2% aqueous solution?
  31. Chemistry

    What volume will 3.5g of CO occupy at 17 degrees Celsius and 1875 torr?
  32. chemistry

    0.947 moles of NaC2H3O2 dissolved in 100 mL solution
  33. chemistry

    What is the oxidation state of the vanadium atom in VO4−
  34. Science (Chemistry)

    Why do ionic materials dissolve so well in water, but not in Hexane?
  35. Chemistry

    What is the volume of 2.0 moles of an ideal gas at 290 K and 2.8 atm?
  36. chemistry

    What is the volume occupied by 0.738g of xenon gas at STP?
  37. chemistry

    Is C2O4H- more likely to act as an acid or base
  38. chemistry

    how many grams of potassium carbonate are in 75.0ml of a 2.44M solution?
  39. Chemistry

    would you classify 2C(s) + H2(g) ---> C2H2(g) +227.4 as endothermic or exothermic? Why?
  40. chemistry

    what is the volume occupied by 2 moles of ammonia at s.t.p(1mole of gas at s.t.p=22.4)
  41. CHEMISTRY

    Hi, please somebody help me. how is potassium chloride extracted from Carnallite?
  42. chemistry

    what is the solubility in grams of KCL3(s) per 100 ml of water?
  43. chemistry

    Can methane and oxygen be separated. If yes, can anyone please mention the method
  44. Chemistry

    How would I find the pH of 0.25 M carbonic acid? also the pH for 0.075 M CN^-?
  45. chemistry

    how to separate the mixtures of methane gas and carbon dioxide
  46. chemistry

    24,8% of potassium ,34,77% of Mn,40,5% of oxygen how do i find the emperical formular thanks in advance
  47. Chemistry

    How many grams of NaCl will you need to mix 200ml of a 2.3M solution?
  48. Chemistry

    How much heat is required for 32.5g of Na2co3 to completely decompose?
  49. chemistry

    The ksp for Al(OH)3 is 3.7*-5 at 20 degrees. What is the solubility of Al(OH)3 in grams per litre?
  50. chemistry

    NUMBER of electorn in 18ml water (solidity is 1gm/ml)
  51. chemistry

    How to distinguish between an acid and an alkali. DO not use indicators
  52. Chemistry

    Why aren't the properties of sodium chloride the same as the elements that compose it?
  53. Chemistry

    Calculate the volume occupied by 5.25 g of nitrogen at 26*c [temperature] and 74.2 cm of pressure.?
  54. Chemistry

    Will addition of water to vinegar affect the determination of its concentration? Why?
  55. chemistry

    describe how you would prepare 500mL of 0.25 M NaNO3 solution?
  56. emmanuel college

    Chemistry A is a solution of H2SO4 containing 2.5g in 500cm3
  57. Chemistry

    What is the catalyst of N2(g)+3H2(g) to give(double arrow) 2NH3(g)?
  58. Chemistry

    Can someone explain to me what an intermediate product is and give me and example?
  59. chemistry

    what is the number of moles of Fe2O3 formed when 5.6liter of O2 reacts with 5.6g of Fe?
  60. Chemistry

    What is a good website to practice limiting reagent problems?
  61. CHEMISTRY

    Explain the terms, Molar mass and Avogadro's number?
  62. math , physics, chemistry

    sec^4x=11tan^2x+5 than what is the value of tanx
  63. Chemistry

    why is graphing a useful way for scientists to display data?
  64. chemistry

    How many inches are in 2.41 m? (2.54 cm = 1 inch, remember significant figures and units)
  65. Chemistry

    Which of the following shows the correct dissolution reaction for BaCl2?
  66. Chemistry

    How does the presence of HCl affect the charges on weak complexes?
  67. chemistry

    The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
  68. chemistry

    The temperature at which crystal will first appear when a solution is cooled from 60°c to 20°c?
  69. Chemistry

    Which one of the following is a diastereomer of (2R,3R)-2,3-dibromopentane? How do I got about this?
  70. Chemistry

    Determine the total grams of Potassium Iodate solution
  71. Chemistry

    4.Report your answer in correct significant figures. A.1.32*10^4cm+2.1*10^2
  72. chemistry

    flow diagram of extraction acid base organic
  73. Chemistry

    What would happen to the peaks on your chromatogram for substances that do not separate?
  74. Chemistry

    Briefly explain the role of CH3CO2Na in the preparation of Fe(C5H7O2)3.
  75. Chm101 introductory inorganic chemistry

    The abundant metal in sea is
  76. Chemistry

    How many electrons in an atom could have these sets of quantum numbers? n=3 n=5 , l=2 n=7 , l=3 , ml=-1
  77. chemistry

    pls balance the equation AL3C4+H2O-CH4+AL(OH)3
  78. chemistry

    what is the connection between periodic trends and relative reactivity?
  79. Grade 12 Chemistry

    5.85gof Naclis Dissolvedin250mlofsolution.Calculatethemass%ofsolute?
  80. Chemistry

    How many moles of phosphorus atoms are in 100 grams of P4S10?
  81. chemistry

    1. In the reaction 2Ca(s) + O2(g) → 2CaO(s), which species is oxidized?
  82. chemistry

    at 25 celcius, how many dissociated OH ions are there in 8.0x10^-1 L of aqueous solution with pH 4.73?
  83. chemistry

    Maximum mass of water in combustion of 20g hydrogen?
  84. Chemistry

    Rank the following in order of increasing bond polarity: H-F, H-Br, F-F, Na-Cl. Is it this....? F-F, H-Br, H-F, Na-Cl
  85. Chemistry

    For which element is the gaining of an electron most exothermic? a)Li b)N c)F d)B *explain
  86. Chemistry

    Calculate The volume occupied at s.t.p by 0.24g of ozone ( o=16, G.M.V=22.4dm3
  87. Chemistry

    How commonly is salicylic acid used or found in nature ?
  88. Chemistry

    6.2g of NaOH is added to 800ml of water What is the molarity of the solution? What is the pH?
  89. chemistry

    Devils food cake has a [H+] of 2.7 x 10-8 mol/L. calculate pH pOH [OH-]
  90. Chemistry

    Give two physical properties of ionic compounds? Thanks.
  91. Chemistry

    is delta S positive for the heating of water from 25 to 75 degrees Celsius?
  92. Chemistry

    How many g of CaCl2 are required to prepare 0.250 L of a 0.200 M solution?
  93. chemistry

    How many grams of SrCl2 is required to prepare 1 molar solution of it,
  94. chemistry

    why we add acid to the standardization of sodium thiosulphate solution?
  95. Chemistry

    1. Convert 1.2 X 10^24 molecules of chlorine to grams. Ans: 70.67 gms
  96. Chemistry

    Which molecule would be more soluble in water ? H----C=C---H or BeCl2
  97. chemistry

    what is the total number of atoms in the compound (NH4)3PO4?
  98. chemistry

    How many molecules are contained in 1.30 mol O2? Answer in units of molec.
  99. Chemistry

    Why can't a single spectral line be used to identify an element?
  100. Chemistry-Dr.Bob

    Why is gasoline (octane) better than diesal (cetane)?
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