chemistry! URGENT

61,858 results, page 52
  1. Chemistry

    What is the concentration of a monoprotic weak Acid if its pH is 5.50 and its Ka= 5.7 x 10^-10?
  2. Chemistry

    How many H atoms are present in 7.2g of propane, C3H8?
  3. Chemistry

    How do you find generic rate of a reaction?
  4. Chemistry 101

    What is the function of lipids and cells?

    why is glass called a supercooled liquid?
  6. Chemistry

    Is CaCl2 a solid or is it soluble? I know Ca is is insoluble...
  7. Chemistry

    Calculate the molality of of a sol'n whose density is 1.15 g/ml
  8. Chemistry

    What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH
  9. Chemistry

    What is the solubility of Ca(OH)2 at a pH of 4.802 Ksp of Ca(OH)2 = 6.500*10-6
  10. chemistry

    an essay on use of radon in prediction of earthquakes
  11. chemistry

    what is activation energy for combustion of sawdust
  12. chemistry

    Why would benzene boil at 100C instead of 80C?
  13. chemistry

    how many moles of Nitrogen are in 80g of N2O?
  14. Chemistry

    how do you finish the equation for Al(NO3)3 + KOH
  15. Chemistry

    Are volume and temperature directly proportional?
  16. Chemistry

    What is the pOH of the solution in the question I asked before this one?
  17. Chemistry hnrs

    what is the electron configuration of vanadium?
  18. Chemistry

    what is the balanced chemical equation for the reaction between Fe and S? ?Fe + ?S -->
  19. Chemistry

    Is this equation correct? 8Fe + S8 --> 8FeS
  20. science

    what is the best way to study for my chemistry test tomorrow
  21. Chemistry

    How many moles of N2 can be in a balloon with a volume of 6.00 L at STP?
  22. college-chemistry

    How do you know when a base is weak or strong?
  23. college chemistry

    prepare 0.2M phospate buffer of pH 5.7
  24. chemistry

    what is name of the compound P2S5? is it phosphorous pentasulfide?
  25. chemistry

    What are the quantum numbers for a 3d atomic orbital?

    What atomic orbital has the quantum numbers n = 3, l = 1, ml = -1?
  27. Chemistry

    Do pipettes blow up like balloons when they are heated. Why or why not?
  28. Chemistry

    Why water can be used as a solvent in paper chromatography?
  29. Chemistry

    Why is the formula for sodium nitrate NaNO3?
  30. Chemistry

    How many mL of Water are made from 4 moles of HNO3?
  31. Chemistry

    What is the oxidation number for each atom in NH4F? N=+3, H=-4, F=+1 N=-3, H=+1, F=-1*** N=+3, H+1, F=-1 N=-3, H=-1, F=+1
  32. Chemistry

    How many molecules are in 5.2L of carbon dioxide gas?
  33. science(chemistry)

    How is ethanol after 1 minutes of evaporation
  34. Chemistry

    Do either maleic or fumaric acids have dipolemoment?
  35. Chemistry

    KOH + KHP --- balanced equation???
  36. Chemistry

    Why do Oxygenated fuels contain less energy than hydrocarbons?
  37. chemistry

    why solution always prepared in HCl and not in HNO3 ?????????
  38. Chemistry II

    Are mixing and separation increases in entropy?
  39. chemistry

    HOW MANY LITERS OF H2 must react to produce 75.0g of PH3
  40. chemistry

    why is no number used in the names ethene and propene
  41. Chemistry

    How much oxygen will we get from 120 grams of KClO3?
  42. chemistry

    how to write the oxidation number for CL4
  43. chemistry

    Why are coefficients used in mole ratios instead of subscripts
  44. Chemistry

    Why are carboxylic acids and phenols acidic?
  45. chemistry

    what is the chemical name and lewis structure of NO3 -2
  46. Chemistry

    How do you find the [OH-] of a 1x10^-3 M solution of NH4Cl?
  47. chemistry

    how do u find the percantage composition of an element?
  48. chemistry

    What is the frequency of a photon resulting from the transition of n = 7 ¨ n = 1 ?

    Is non-dairy creamer a colloidal dispersion
  50. chemistry

    what the balance equation for solid carbon
  51. chemistry

    number of mole in 850.5g of zinc
  52. Chemistry

    0.60 mol of steam condenses at 100°C
  53. chemistry

    How many millimoles of H+ are present in 1.00 L of 1.24 M CF3CO2H solution?

    whats the chemical composition of steam?!?
  55. Chemistry

    Highest ionization energy to lowest I be ci f
  56. chemistry

    how can we find which kinetic energy is higher?
  57. Chemistry

    What is the % mass/volume of a 3.00 M solution of NaCl?
  58. Chemistry

    What is the % mass/volume of a 3.00 M solution of NaCl?
  59. chemistry

    How is colloid distinguished from a solution or a suspension?
  60. chemistry

    calculate the pH of a 0.100M NH4Cl solution.
  61. Chemistry

    How do I find the radius of a sulfide ion?
  62. chemistry

    What is the heaviest element that has only one isotope and is not radioactive?
  63. Chemistry

    What are the products of nitrogen dioxide and methane?
  64. chemistry

    After your explanation I try to solve it, so would you please check my work again. Thank you! a)
  65. Chemistry

    Please help me solve this empirical formula.Im so confused C=58.5% H=4.1% N=11.4% and O=26.0% Thank you so much
  66. chemistry

    A cylinder contains 40 g of HE, 56 g of N2, and 40 g of Ar. How many moles of each gas are in the mixture?
  67. chemistry

    When doing an experiment with a calorimeter why is important to keep the lid on?
  68. Chemistry

    Convert the concentration of CoCl2 from 22.0 mg/mL into molarity.
  69. chemistry

    What do you expect when you mix 1M Na2SO4 with 1M CaCl2?
  70. chemistry

    459 torr is how much in atm, pascals, and mm Hg?
  71. Chemistry

    which has a shorter bond between nitrogens? N20 or N3-
  72. Chemistry

    Propanoic acid has a Ka of 1.3 x 10^-5. What is the % ionization in a 3.0M solution?
  73. ap chemistry

    What is the molar mass of glucose, C6H12O6?
  74. Chemistry

    h2po4(aq) + co34(aq) hco3 (aq) + hpo42 (aq)
  75. Chemistry

    Why do chloride ions increase corrosion?
  76. Chemistry

    if you produce 5.7 of H2O, how many liters of O2 will be required?
  77. Chemistry

    How do I prepare 30 mL of NaOH by dissolving it in water?
  78. Chemistry

    The pH of a .200M HBrO solution is 4.67. What is the acids Ka?
  79. Chemistry

    What is the root-mean-square speed of N2O at 25°C?
  80. chemistry

    How many moles of are needed to react with 0.460 ?
  81. chemistry

    how much of 0.5normal fas is equal to molar
  82. College Chemistry

    Calculate both [H30] and [OH-] for a solution that is: pH=5.50 ph=7.00
  83. chemistry

    theoretical pH 14-0.5(pKb-log[base]) = ? please help
  84. Chemistry

    If you have 1.80 moles of H2, how many gram of NH3 can be produced?
  85. chemistry

    Covert 22.3 grams of C6H12O6 to molecules
  86. Chemistry

    What is the enthalpy change when 19.0 g of water is cooled from 33.0°C to 2.70°C?
  87. chemistry

    What is the hybridization of trioxo nitrate v ions ?
  88. Chemistry

    What does it mean when a problem says "give the values for STP"?
  89. Chemistry

    How do i prepare KH2PO4-KOH buffer 0.2 M of pH 7.4?
  90. Chemistry

    Solubility of PbCl2 in brine solutions
  91. chemistry

    What reaction would you get if you added sodium to water ?
  92. Chemistry.

    Is this formula (Fe2O3) iron oxide?
  93. Chemistry

    What is the percentage of potassium chloride to oxygen?
  94. Chemistry

    What is the percentage of potassium chloride to oxygen?
  95. Advanced Chemistry

    What is the (name of the) molecular structure of AlCl3NH3 ?
  96. Chemistry/Science

    Can a reaction order be negative?
  97. chemistry

    A B C D E F G H 14Si A B C D E F G H 13Al A B C D E F G H 12Mg A B C D E F G H 4Be A B C D E F G H
  98. Chemistry

    name the three fundamental particles present in an atom
  99. chemistry

    how many significant figures are there in this measure: 1.000 30
  100. chemistry

    How are sugars stored in onions and potatoes?