chemistry! URGENT

61,409 results, page 69

  1. Chemistry

    What is the pH of a buffer solution that is 0.20M methylamine and 0.15 M methylammonium chloride. which do i get the pH of
  2. chemistry

    4. Write the expression for Ka for the ionization of acetic acid in water.
  3. chemistry

    Describe an object that commonly undergoes (or could undergo) oxidation.
  4. chemistry

    how do i calculate the molar solubility of AgBr in .10M NaBr?
  5. chemistry

    What is the percent ionization of a 1.38 mol/L weak acid if its Ka = 2.7 x 10^-6? Thanks again!
  6. Chemistry

    How do i write a good discussion/conclusion for a lab report.
  7. chemistry

    How many mL of 0.3 M HCl(aq) are needed to neutralize a 60 mL solution of 0.15 M Ba(OH)2? THe answer please
  8. chemistry

    the number of dorbitals in the second prinicipal energy level ?
  9. chemistry

    predict the pH of an aqueous solution that is 0.00378 molar in HBr
  10. chemistry

    what is the pH of an aqeuous solution with s hydroxide ion[OH-] concentration of 7.5x10-10 M?
  11. chemistry

    What are the monomers of aspartame? I can only get one, which is methan ol, but what are the others?
  12. chemistry

    write the balanced half reaction for the conversion of Cl2(g)to Cl-(aq)
  13. chemistry

    which of the following is not acidic milk saliva softdrink or blood
  14. chemistry

    what is the pH of a NaOH solution whose concentraiton is 4.5 * 10^-5 M. HOW WOULD I DO THIS PROBLEM??
  15. chemistry

    The oxidation number of chromium (Cr) in the dichromate ion (Cr2O72-) is A. +2 B. +4 C. +6 D. +7 E. -2
  16. chemistry

    what type of reaction is 2KCLO3+heat-2KCL+3O2
  17. chemistry

    The equation Mg(s) 2HCl(aq)---MgCl2 (aq) H2(g) is an example of which type of reaction?
  18. chemistry

    Explain what a saturated solution is. Give a specific example.
  19. Science Chemistry

    What is molecule, element, and compound? What is the relationships between them?
  20. A&P

    Why is chemistry such an important part of the study of Anatomy and Physiology?
  21. chemistry

    What is the difference between Keq and the term of [prod]pr / [react]pr?
  22. chemistry

    (3.21x10 to the 8th)(6.32x10 to the -12th) is it... 20.2872x10 to the -4th?
  23. chemistry

    how wouldi figure out how many moles are in 3.52 times 10 ^23 F atoms?
  24. CHEMISTRY

    CALCULATE THE MASS OF 8.37X10TO THE 25 MOLECULES OF DINITROGEN TETRAHYDRIDE
  25. chemistry

    The polyatomic anion contains elements 1,6,and 8. The cation has 10 electrons.
  26. chemistry

    what is the height length and width of a jolly rancher in centimeters?
  27. Chemistry

    What is extensive physical, and intensive chemical? What's the difference between them?
  28. chemistry

    why do they put chlorien in swimming pools and drinking water???
  29. chemistry

    What is the precision of lab equipment? More importantly, how do you find it?
  30. chemistry

    What is the density (in g/L) of hydrogen gas at 18.0 C and a pressure of 1670 psi?
  31. chemistry

    i need 3 types of suspensions found in a science lab
  32. chemistry

    reaction between iron fillings and su lphur will form
  33. Chemistry

    What are the names of all the classes of substances that conduct electricity?
  34. Chemistry

    This should be easy... What would 61.98 be to three sig figs?? 62.0 or 61.9??
  35. Chemistry

    Why do bromine and iodide have similar chemical properties?
  36. Chemistry

    How does H2O effect NaH2PO4 during an acid titration?
  37. chemistry

    What mass of KCl will dissolve in 35g H2O at 80 degrees C
  38. Chemistry

    is KAl(SO4)2 12H2O hygroscopic, deliquescent, or efflorescent?
  39. chemistry

    a compound contains only c,h and o. c=48.65% and h=8.11%.a)calculate its emperical formula
  40. Science - Chemistry

    Balance the following chemical equation. Al + 02 -> Al2O3
  41. Science (Chemistry)

    Why does glass exists as a supercooled liquid at STP?
  42. chemistry

    how do you write the formula for an oxoacid..for example bromic acid?
  43. Science: Chemistry

    Indentify the products of the following reaction: Al + NaOH -> ?
  44. Chemistry

    An ammonium halide A contains 9.664% nitrogen. Identify A.
  45. Chemistry

    In the Periodic Table, why does Group 2 and 17 bond together so easily? ~thanks
  46. chemistry

    how do i calculate the wavelength of light emitted by a hydrogen atom?
  47. chemistry

    Do nonmetals have a higher or lower ionization energy?
  48. chemistry

    how many grams of glucose are required to produce 50mL of 0.1 m solution?
  49. Chemistry

    What is the formula for: calcium iodate and iron (III)perchlorate
  50. chemistry

    is it possible to fine moles when you are only given the volume ?
  51. chemistry

    How can use litmus paper to distinguish an acid from a base?
  52. Chemistry

    I have 250 grams of Al2(PO4)3 How many moles of Al are there?
  53. chemistry

    what is the density of ammonia at 90 degree C and 740 torr pressure?
  54. Chemistry

    What is sodium acid pyrophosphate used for in food products.
  55. 9th grade chemistry

    what is the study of substances containing carbon?
  56. Chemistry

    Calculate the electronegativity differences between the following atoms: 1.C-H 2.O-H 3.C-O
  57. Chemistry

    Please help me with this problem What is the Balance chemical equation for Al(s) + H2O(l)-->
  58. chemistry

    What is the explanation for the discrete lines in atomic emission spectra?
  59. CHEMISTRY

    What is the explanation for the discrete lines in atomic emission spectra?
  60. chemistry

    what is formed when CH3COOH reacts with NH3. I need an equation:)
  61. chemistry

    h2+I2 <-------> is independent of ? 1) temperature 2) concentration 3) catalyst 4) pressure 5) reactants
  62. chemistry

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

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

    How would you balance this equation: CuS + KCl = ? Can you explain.
  65. chemistry

    Can you explain the electron configuration for the transition metal ions?
  66. chemistry: again

    What is the predominant type of intermolecular force in I2 (iodine)?
  67. Chemistry Lab

    Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not? thanks in advance
  68. Chemistry Lab

    Do you expect acetaminophen to be soluble in water? why or why not? thanks in advance
  69. chemistry

    How do you separate iron from sulphur without the use of a magnet.
  70. chemistry

    how do you balance this equation K2SO4 + Ca(NO3)2 -> CaSO4 + KNO3
  71. chemistry

    how much heat is absorbed if 200g of water changes from 20 C to 80 C?
  72. Chemistry Web Quest

    How do you recover the dissolved solid in a solution?
  73. Chemistry

    Determine the percent composition by mass of ammonia sulfate.
  74. Chemistry

    State two differences between DNA and RNA.
  75. chemistry

    what is the meaning of "accepted value" with respect to an experimental measurement?
  76. chemistry

    Can you tell me why ketones and aldehydes don't bond with hydroxyl groups?
  77. Pre-Chemistry

    What is the chemical name thing for salt? Anyone? Bueller?
  78. chemistry

    How would you prepare 250.0 ml of a 0.6 M aluminum sulfate solution
  79. Chemistry

    how many moles of Na2C2O4 are there in 25.00 mL of a .7654 M solution of sodium oxalate?
  80. chemistry

    what is the volume of a 2.00 gram sample of helium gas at STP?
  81. chemistry

    why does Fe3+ react with sea salt/ NaCl????? help out
  82. chemistry

    What is the net ionic equation of AlPO4(s) dissolved in H3O+(aq)
  83. chemistry

    What is the net ionic equation of AlPO4(s) dissolving in H3O+(aq)
  84. chemistry

    what are the different types of solutions?? is it saturated nonsaturated and supersaturated?
  85. chemistry

    Why does a solute dissolve faster in hot water than cold?
  86. Chemistry

    What is the Lewis dot structure for LiF? Is it Li - F with 2 dots on each side of F?
  87. chemistry

    Why do group I cations form precipitates when mixed with HCL?
  88. Chemistry

    How many molecules are in 112 grams of water? Can you show me the proportion for how to do this? Thanks for your help :-)
  89. Chemistry

    What is the molarity of a solution prepared by diluting 100g of NaH2PO4 to 1L?
  90. Chemistry

    If you had 6 moles in a 600ml of solution, what would be the molarity?
  91. Chemistry

    There are 200 mmoles NaOH/400ml. What is the molarity of the solution?
  92. Chemistry

    How many grams of NaCL are required to make 250ml of a 0.4M solution?
  93. chemistry

    which stage of ionization usually produces more ions?
  94. Chemistry

    Why are chemical equations balanced? Explain at the atomic level.
  95. chemistry need help

    In a solution, which component is considered the solvent? Which is the solute?
  96. chemistry

    What is the basic physical principle that chromatoraphy is based upon?
  97. chemistry

    the net ionic equation of the ionization of HClO3 in water
  98. Chemistry

    What is the difference between the substance oxidized and the oxidizing agent?
  99. chemistry

    What is the pressure in a 1.5 L vessel containing 0.25 moles of O2 if the temperature is 37oC?
  100. chemistry

    how many liters of CO2 are in 50kg of carbon dioxide at STP?
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