chemistry! URGENT

61,546 results, page 51

  1. chemistry

    Except for rubidium and caesium,___
  2. Chemistry

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

    what would the product be of HNO3 is heated
  4. chemistry

    0.05naoh in 2and half ml naoh?
  5. Chemistry

    What is the pH of a solution whose [H3O+] is 9.2× 10^−9 M?
  6. CHEMISTRY.

    what would be the VSEPR shape of pyridine?
  7. Chemistry

    what is chemical equation for the preparation of siliconcarbide
  8. CHEMISTRY.

    what would be the VSEPR shape of pyridine?
  9. Chemistry

    Uranium 235 problem that exits
  10. Chemistry

    What does each electron outside of a nucleus occupy?
  11. chemistry

    what type of bonding is phosphoric acid?
  12. Chemistry 2

    CALCULATE THE SOLUBILITY OF CuBr in 0.69 M NH3
  13. chemistry

    what is the hybridization of each atom for hydrocyanic acid?
  14. chemistry

    what is a complete and incomplete combustion reaction ??
  15. Chemistry

    Why organic compound are volatile in nature
  16. Chemistry

    Which halogen has the lowest electron affinity?
  17. Chemistry

    what is the pH of 0.80 M NaCN? What is the concentration of HCN in the solution?
  18. Chemistry

    To remove temporary hardness we may use ?!!!
  19. Chemistry

    what three substances are usually electrolytes?
  20. Chemistry

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

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

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

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

    What is the monomer and polymer structure of DNA?
  25. chemistry

    what will be the pH of a solution NaOH with the concentration 2,2.10mol
  26. chemistry

    If the pH of an aqueous solution is 5, what is the OH− concentration?
  27. chemistry

    calculate the no. of molecules in 16g of methane is:
  28. physical chemistry

    the no. of atoms in 558.5g of Fe (at wt = 55.85u) is:
  29. Chemistry

    What is the mass of a proton? Is it 1g, 1amu, or something else?
  30. chemistry

    What is the concentration of a 1:2 dilution of a 0.6 M NaHCO3 solution?
  31. CHEMISTRY

    Why does hydrogen electrode have 0.00 V ? or assumed that has 0.00 V ?
  32. chemistry

    So i if do 4 x250/100 i will get the answer for the prob?
  33. Chemistry

    Calculate PH of 0.05 M solution of ammonium acetate
  34. chemistry

    How many grams are there in 2.5 moles of CuSO4.5H2O?
  35. chemistry

    kc expression for aluminum+hydrochloric acid
  36. chemistry

    How many moles of atoms are there in 32g of sulfur?
  37. chemistry

    ferusamoniumsulphate reaction with sulphuric acid
  38. chemistry

    explain how to prepare a 200cm,0.25 ofH2SO4
  39. Chemistry

    How do you cope with a fire on your labatory bench?
  40. chemistry

    medicine you would find in your house?
  41. chemistry

    Given that PVnR=T, solve for n if P = 36.0, V = 8.6, R = 0.08, and T = 200
  42. chemistry

    what is the mass of oxygen in a 5.6 g sample of Al(NO3)3.
  43. CHEMISTRY

    How do the indicators work , by changing color ?
  44. Chemistry

    What is 100mL of water + 45.00g of ice?
  45. chemistry

    Identify the functional groups in menthol
  46. chemistry

    Discuss how you would separate Fe+3 from Ca2+
  47. chemistry

    How many grams are in 2.5 moles of magnesium hydroxide
  48. chemistry

    Can you make a 2 carbon molecule of Ketone?
  49. Chemistry

    What is the numerical value of one mole?
  50. Chemistry

    define pressure how many mm Hg are in 875.1kPa
  51. Chemistry

    How many atoms of nitrogen are in 3.00g of N2O5?
  52. chemistry

    1/10^-8 in scientific notation. I need help please.
  53. chemistry

    What is the pH of a 100g/l solution of potassium cyanide?
  54. chemistry

    How many moles of Ca(OH)2 are in 4.10 kg of Ca(OH)2? Answer in units of mol
  55. chemistry

    V1= 38.8 n1= 1.60*10^-3 V2= 49.9 n2= ? How do we solve for n2 using avogadro's law?
  56. chemistry

    What is the correct formula for calcium nitrate
  57. Chemistry

    How do we use 2 indicators to confirm the pH of a solution?
  58. chemistry

    how many moles of HCL are contained in 34.7 mL of 8.00 M solution ?
  59. Chemistry

    What is the molarity of 35.0 of NaCl in 125 mL of water?
  60. chemistry

    263 mL ethanol to its mass in grams
  61. chemistry

    How many grams of O2 are contained in a 25.0L sample at 5.20 atm and 28.0C?
  62. chemistry

    how many moles of Kl are present in 500 ml of a 0.2 M solution?
  63. chemistry

    what is the molality of 18 g NaCl in 200 g of H2O?
  64. CHEMISTRY

    What is the pH of a solution with [H3O+] = 1 x 10-9 M? My answer is pH=9. is that correct
  65. chemistry

    what wil be the molarity if it increases from 20 c to 100 c?
  66. chemistry

    grams of potassium permanganate are in 2.58 moles i don't get it ? help
  67. chemistry

    Can somebody please answer my question.
  68. chemistry

    Calculate the number of moles in 74.1 g Pb(C2H3O2)2.
  69. chemistry

    a radioisotope is called a tracer when it is used to
  70. Chemistry

    What are some cons of becoming a pharmacologist?
  71. Chemistry

    What is the address of the 11 th electron of magnesium? And how do you determine this?
  72. chemistry

    How to prepare 250.0 mL of 0.076M NaOH?
  73. Chemistry

    Outline the prepartion of 2-chlorobutane from an alcohol?
  74. chemistry

    An equilibrium is dynamic. true or false
  75. chemistry

    2) At 298K, what are the molarities of pure water?
  76. Chemistry

    What is the enthalpy change when 25 g's of PCl5 are decomposed /\ H= 90
  77. Chemistry

    calculate the density of NH3 at S650mm of Hg
  78. chemistry

    How many grams of carbon are in 2.42 moles of C2H6
  79. Chemistry Help

    WHAT???? which of these are electrolytes?? CH3CH2OCH2OH PCl3 Na2CO3 O2
  80. Chemistry

    Calculate the pOH of a 0.410 M Ba(OH) solution.
  81. chemistry

    How many kilocalories are required to produce 12.7g of aluminum?
  82. Chemistry

    Find the Density of xenon of STP
  83. chemistry

    why gasoline wouldn't dissolve in water ?
  84. Chemistry

    Calculate the mass of 5.35 mol of iodine
  85. chemistry

    what's the lewis dot diagram for methanol?
  86. chemistry

    How to prepare 14M Sulfuric acid
  87. Chemistry

    How many oxygen atoms are in 6Al (SO4)3
  88. Chemistry

    How many mL of HCl solution are required to change pH from 2.67 to 9.25?
  89. chemistry

    7.5 gm of chromium and 7.5 grams oxygen yield
  90. chemistry

    who created the mcilvaine buffer system?
  91. Chemistry

    Why can't milk of magnesia (Mg(OH)2), act as a buffer?
  92. chemistry

    calculate the density of NH3 gas at s.t.p.
  93. chemistry

    d(g)--->3/2 e(g)+5/2 f(g) when e increases by .25 mol/l*s how fast is f increasing
  94. Chemistry

    How does a pH of a buffer solution go outside of its range?
  95. chemistry

    What is the oxidation number of chlorine in Al(ClO4)3?
  96. chemistry

    estimate the boiling point of Pcl3
  97. chemistry help

    calculate the PH of a buffered solution of HF and F (Pka of HF is 3.2)
  98. chemistry

    How do you separate oxygen and methane gases?
  99. chemistry

    A|A+3(0.1)||B+2(0.01m)|B GIVEN E°A|A+3=0.75v E°B|B+2=0.45v
  100. chemistry

    What mass of copper will be deposited by a current of 7.89?
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