chemistry! URGENT

61,843 results, page 56
  1. chemistry

    How does the spin of an electron affect its energy?
  2. chemistry

    Calculate the wavelength of a photon with energy 2.45 eV.
  3. Chemistry

    How do you find the molar mass of HBr?
  4. chemistry

    Calculate the wavelength of a proton with energy 2.45 eV.
  5. Chemistry

    Calculate PH of 0.05 M solution of ammonium acetate
  6. Chemistry

    Information about the development of Avogadro's number.
  7. chemistry

    What is the concentration of hydroxide ions in a solution with a pH of 9.00?
  8. chemistry

    what is the [H3O+] of a solution that is .01 M in HOCl and .03 M in NaOCl?
  9. chemistry

    what are three common ores from which copper can be extracted
  10. chemistry

    At which temperature is NaCl more soluble in water, 0°C or 90°C? 0°C 90°C
  11. Chemistry

    How do I convert the following quantity to moles? 44.0g of H2O
  12. chemistry

    why is no number used in the names ethene and propene
  13. chemistry

    How would polyethylene have the VSEPR shape of tetrahedral?
  14. Chemistry

    How much ethanol must be used to prepared 150 mL 10% by volume?
  15. chemistry

    How many grams of NaOH are there in 2.5L of a 0.343 M solution?
  16. Chemistry

    Is sulphuric acid covalent? Please explain. Thanks.
  17. Chemistry

    Under the symbol 2so3 is that the same as 2 molecules of so3?
  18. chemistry

    why does HF have a boiling point of 19°c and H2O 100°c
  19. Chemistry

    How many H atoms are present in 7.2g of propane, C3H8?
  20. chemistry

    monoclorur 1 methyl 3 hekzan isomers
  21. chemistry

    convert 725mm Hg into equivalent kPa
  22. Chemistry

    Are volume and temperature directly proportional?
  23. Chemistry

    The maximum molecular mass ............ Atoms.
  24. Chemistry

    How many molecules are present in 1.00 mg of asprin, C9H8O4?
  25. chemistry

    how many liters H2O need for incineration 25 L C3H8
  26. Chemistry

    Would distilled water conduct electricity? Why or why not?
  27. chemistry

    would measuring dimensions of a solid always be possible? Explain thanks =]
  28. chemistry

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

    express the following in exponential notation : (a) 0.0030
  30. Chemistry

    What is the name of the substance with formula Cu(H2O)6SO4?
  31. chemistry

    How can you tell if two compounds that you steam distilled are pure?
  32. Chemistry

    Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
  33. chemistry

    what helps to hold funnel up during filtration
  34. Chemistry

    The most abundant noble gas in atmosphere among He, Kr, Ar, Xe?
  35. chemistry

    what is the symbol for extreme temperature in lab
  36. chemistry

    What is the solubility of M(OH)2 in a 0.202 M solution of M(NO3)2?
  37. chemistry

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

    How many moles of compound are in 30.2 g of Na2CO3·10H2O?
  39. Chemistry

    Why does the carotene elute from the column before the chlorophylls?
  40. chemistry

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

    Why does the carotene elute from the column before the chlorophylls?
  42. Chemistry

    How many carbon atoms are contained in 2.8g of C2H4?
  43. chemistry

    How much iron can be recovered from 25.0 grams of FeO?
  44. Chemistry

    What kind of reaction is the following equation? Ca + H20 -> Ca(OH)2 + H2 (g)
  45. Chemistry

    [OH] = 1.5 x 10^-13 , what is the [H3O] ? This is what I did. 1.0 x 10^-14 M / 1.5 x 10^-13 M = 1/15 or.066666 So what is the correct answer? Thank You
  46. Chemistry

    How many moles of ammonium sulfate were released in 25.3 kg?
  47. Chemistry

    Why does the carotene elute from the column before the chlorophylls?
  48. chemistry

    in balancing I3- --- I- + IO3- wat is reduced to what
  49. chemistry

    In the compound BACO3, what is the strongest IMF?
  50. Chemistry

    Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
  51. chemistry

    name the following complex ions: [Cu(OH)4]^2- [Ni(NH2CH2CH2NH2)]^2+ [Co(SCN)4]2-
  52. Chemistry

    What is the electron pair geometry for NCL3?
  53. Chemistry

    What is the electron pair geometry for NCL3?
  54. chemistry

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

    Lewis diagram for NO3- and NH4+
  56. chemistry

    how does the electrolyte paste in a battery work
  57. chemistry

    kc expression for aluminum+hydrochloric acid
  58. chemistry

    is borax less base than amonia and why? thsnks.
  59. chemistry

    How many moles of atoms are there in 32g of sulfur?
  60. Chemistry

    What generally happens to metal oxides when you heat them ?
  61. chemistry

    ferusamoniumsulphate reaction with sulphuric acid
  62. Chemistry

    The grams of oxygen that would produce 13.4 g Cl^2O^7 molecules.
  63. chemistry

    how many covalent bonds are there in methane molecule
  64. Chem

    hydrate mean in an inorganic chemistry context
  65. chemistry

    explain the term carbonate error ..
  66. Chemistry

    How do you balance Fe2O3+C. 2Fe+CO2
  67. chemistry

    How many grams of solute are in 2.l L of 3.7Moles of Al(NO3)3
  68. chemistry

    in balancing I3- --- I- + IO3- wat is reduced to what
  69. Chemistry

    What is the products for HCl + Na2S04 + BaCl2?
  70. Chemistry

    A Solution Has A PH Of 3.4.What Is Its Hydrogen Ion Concentration?
  71. chemistry

    how can i know whether solution is acidic or not and then what type of acid?
  72. Chemistry

    what are the relative strengths of the different intermolecular forces?
  73. Chemistry

    What is the formula for Iron(III) sulfide? And why?
  74. Chemistry

    I only have a question. For an chemical Equation, what does it mean if there is a coefficient of 1? Is it the same as Nothing?
  75. Chemistry

    Which atom is most likely to form a 2+ ion? Zn, Al, S, Na, N, cannot be determined
  76. chemistry

    What causes the calcium and ATP concentrations to decrease?
  77. chemistry

    what is the reaction between potassium chloride and bromine?
  78. Chemistry

    Calculate the mass of Mg needed to produce ~40 mL of H2. how do I do this?
  79. chemistry

    write the products of these combination reactions: K + O2 ---> Ca + S ---> F2 + Al --->
  80. chemistry

    how would you state Ag2CrO4 acting as a cathode?
  81. Chemistry

    How do you determine the pH of a substance with an H+ concentration of 3.2 x 10^-3? Thanks in advance!
  82. chemistry

    why doesnt sun attract earth towards it
  83. chemistry

    How we make 0.02ppm solution in 25ml?
  84. chemistry

    what is the temprature at which molecular motion ceases??
  85. Chemistry

    How does the molecular wight of the gas affect the k-value?
  86. Chemistry

    What is the bond enthalpy of N2(g)+2H2(g) --> N2H4(g)?
  87. Chemistry

    What is the molecular structure of methylated spirit
  88. chemistry

    At what ph will Al(OH)3 begin to precipitate from a .10 M solution of AlCl3?
  89. chemistry

    fisrt ionization energy across period three
  90. Chemistry

    How many grams of AlCl3 are produced when 53.0 g of Al reacts?
  91. chemistry

    how many moles of N2 (g) re present in 1.00 of N2 (g) at 100 c and 1 atm?
  92. Chemistry

    how do you find PH of 0.010 M HNO3 solution?
  93. chemistry

    complete and balance the following : Zn(s)+HCl(aq)-> Zn(s)+Cu2+(aq)->
  94. chemistry

    why are anions always larger than the atoms from which they are formed
  95. Chemistry

    What's the molar mass of AuCl3 x 2H20?
  96. chemistry

    how would you prepare 300 ml of a 10% CaCl2 solution (w/w)?
  97. chemistry

    How to determine saturation point of k2Cr2O7?
  98. Chemistry

    Why is it important to not let the wooden split burn ?
  99. Science--Chemistry

    How do you solve the reaction: Li + Mg2+ = ?
  100. Chemistry

    How many grams of drug X are in 10 mL of a 1:200 solution of X?