chemistry! URGENT

61,546 results, page 72

  1. Chemistry

    Aluminum is an example of what? a-a compound b-a solution c-an element d-an alloy
  2. Chemistry

    Which solution has the higher osmotic pressure, 2 M NaCl or 2 M CaCl2?
  3. general chemistry

    For a molecule with the formula AB2 the molecular shape is
  4. analytical chemistry

    why is it necessary to buffer the solution at pH 10 during titration?
  5. chemistry

    how many grams of 5%NaNO3 will be required to prepare 250ml solution
  6. chemistry

    If the molar solubility of lead iodide is 2.4 x 10^-3M. Calculate the Ksp.
  7. Chemistry

    The percentage composition of chlorine, by mass, in the compound K2PtCl4 is
  8. Chemistry

    Under the symbol 2so3 is that the same as 2 molecules of so3?
  9. Chemistry

    In general, what are the conditions required for Schiff's Base to polymerise?
  10. chemistry

    energy+socl2(g)=so2(g)=cl2(g),what will happen to the temp?
  11. chemistry

    what happens when oil goes in the ocean. and what are the different effects
  12. Chemistry

    What mass of pure aluminum can be dissolved by 13mL of 1.6M KOH?
  13. Chemistry

    How many atoms of 0xygen are there in 8.43 g of KMnO4? Could someone please explain this?
  14. chemistry

    what subshells would be found in the shells with n=3 and n=4?how many orbitals are there in a g subshell?
  15. chemistry

    how to balance ZnO+2HCl yields ZnCl2+H2O
  16. chemistry

    Identify the ions present in KClO4. The answer is K+ and ClO4- how do you know this?
  17. chemistry

    2.48 x 10-3 eV What would be the rest mass of a particle with that energy (in kg units)?
  18. chemistry

    A single 4p orbital can hold how many electrons? i got 6 is that correct or no?
  19. chemistry

    what features account for carbohydrates high solubility in water?
  20. chemistry

    what is the density of a solid object with a mass of 1.65 lb and a volume of 170ml?
  21. College Chemistry

    A plant grows. Is that a chemical or physical change?
  22. Chemistry

    Does water and methanol absorb light in the UV-Vis region?
  23. chemistry

    Which is the Standard International (SI) unit of temperature? Kelvin or Celsius
  24. chemistry

    Which is an example of an anion? A. potassium B. ammonium C. sodium D. chloride
  25. chemistry

    how many moles of solute is present in 40.0mL of 1.000 M of HNO3
  26. chemistry

    How many milliliters of a 0.50 M solution contain 14.0 g of BaCl2 (Barium Chloride)?
  27. chemistry

    What is the half-life of an isotope if it decays to 12.5% of its radioactivity in 18 minutes?
  28. 12th grade chemistry

    The number of electrons in an atom of Iron-56 is
  29. 10th grade Chemistry

    The most reactive group of the nonmetal are the?
  30. Chemistry 3

    For each of the following sublevels, give the n and l values and the number of orbitals. (a) 3s (b) 5f (c) 5g
  31. chemistry

    How many moles of \rm HNO_3 are present in 40.0 mL of a 2.40 M solution of nitric acid?
  32. chemistry

    how does kinetic molecular theory help us to explain boyle's law?
  33. Chemistry

    what is the temperature change in Celsius when 29.5 L of what absorbs 2.3 kWh of heat?
  34. Chemistry

    If a person has a mass of 62 kg, how many pounds of water does she have in her body?
  35. Chemistry

    If aluminum has a density of 2.7g/cm3,what is the mass,in grams of the foil?
  36. Chemistry

    How can beta radiation be stopped by a piece of aluminum foil?
  37. chemistry

    how many grams of hydrogen are produced when 1gram of aluminum is reacted?
  38. Chemistry

    How many grams of iron are there in a sample of Fe3O4 which weighs 8.338 g?
  39. basic chemistry

    how do I find the ratio of when to solutes completely react?
  40. chemistry

    How many ML of H2SO4 (20m) are needed to make 500ml of 5M solution?
  41. ap chemistry

    in which type of process does the H of a system decrease? endothermic or exothermic
  42. Chemistry

    1) What is the pH of 3M KCl? 2) In general, is Ag2SO4 considered soluble in water?
  43. chemistry

    1.why is potassium permanganate used in the process of distillation of water?
  44. inorganic chemistry

    what is the geometry structure of Fe(NH4)2(SO4)2.6H2O?
  45. chemistry

    how many pounds of uranium are needed to make a nuclear bomb
  46. chemistry

    Determine the oxidation state for the second element in SO3
  47. college chemistry

    what is the theoretical percent of water in CuSO4 x's 5H2O?
  48. chemistry

    How many mole of carbon are needed to react with 60 mol of sulferdioxide?
  49. chemistry

    Calculate the volume of 1.80 M \rm Na_3PO_4 in milliliters that contains 6.00 g of solute.
  50. chemistry

    what is the kinetic energy of a goose with a mass of 17.9 Ibs. and is flying 11.9 m/hr.?
  51. Chemistry

    NH4+ + OH- NH3 + H2O What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  52. Chemistry

    H- + C6H5CH2COOH = H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  53. Chemistry

    OH- + C6H5CH2COOH H2O + C6H5CH2COO- What is the K for the reaction above in terms of Ka's, Kb's, Kw etc.?
  54. chemistry

    What is the relative mass ratio of 11.31g of pb and 6.64g of au when pb has 3 mols and au and 2?
  55. Chemistry 1151

    How many oles of Neon are in a 25mL container at STP?
  56. Chemistry

    How many moles of n2 are needed to react with 0.500 mol of lithium
  57. Chemistry

    How many moles of HNO3 are present in 35.0 mL of a 2.60 M solution of nitric acid?
  58. Chemistry

    How many moles of KMnO4 are present in 300 mL of a 4.90×10−2 M solution?
  59. chemistry

    Calculate the pH when 0.446 g of Cu(NO3)2 (s) are dissolved in 250.0 mL of water
  60. Chemistry

    A scientist has 0.46 mL of a solution. How would she convert this volume to microliters?
  61. chemistry

    What is the frequency of a Hydrogen photon resulting from the transition of n = 7 → n = 1 ?
  62. chemistry

    what is the atomic number of an atom X which has 14 protons 14 electrons and 12 neutrons? 2 14 12 26
  63. chemistry

    what is the atomic weight of an atom x which has 14 protons 14 electrons and 12 neutrons 2 14 12 26
  64. chemistry

    theoretical percent sulfate in AlK(SO4)2*H2O
  65. chemistry

    why is it important to record detailed observations, not just conclusions?
  66. chemistry

    If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?
  67. chemistry

    what is the mass in kilograms of 750 mL of a substance that has a density of 0.930 g/mL?
  68. Chemistry

    Why do Oxygenated fuels contain less energy than hydrocarbons?
  69. Chemistry

    What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?
  70. chemistry

    write the formula of the conjugate acid for base H2PO
  71. Chemistry

    Calculate the temperature, in K, of 2.20 moles of gas occupying 3.50 L at 3.30 atm.
  72. Chemistry 106

    Calculate number of moles of aluminum in 1.50kg of Al
  73. chemistry

    If 50.0 g of NaCl is mixed with 100.0 g of water at 80.0 °C, how much will not dissolve?
  74. chemistry

    Calculate pH of 0.02 mol/L Ba(OH)2 solution. (Assume 100% dissociation).
  75. chemistry

    How many moles are in a sample of cobalt containing 5.0x10^23 atoms?
  76. Chemistry

    How many moles of NF3 are in 850.49 grams of nitrogen triflouride
  77. chemistry

    If you have 1.90 moles of H_2 How many grams of NH_3 can be produced?
  78. chemistry

    how many moles of sodium ions are present in 3.50 L of 0.400 M Na3PO4?
  79. chemistry

    what is the structure of histidine, arginine, tryptophan, proline and tyrosine at pH 4?
  80. chemistry

    how can AgCl(s) be dissolved completely? write an equation for the reaction
  81. Chemistry

    why is flame test for chemicals important? give me reasons
  82. chemistry

    what gas law did you use to answer my questions earlier?
  83. chemistry

    A gas measures 500 ml at a temperature of -23 C. Find its volume at 23 C.
  84. chemistry

    a little help please? Anyone? can someone explain to me the trend in radii of O2-, F-, Na+, and Mg+
  85. Chemistry

    What is the wavelength lambda of the photon that has been released in 2.05x10^-18?
  86. Chemistry

    Calculate the concentration of H3O+ that contains 5.5 x 10 ^-5 moles/L OH- at 25 degrees
  87. 11th grade Chemistry

    How to draw a Lewis dot structure....
  88. 11th grade Chemistry

    How to draw a Lewis dot structure....
  89. Chemistry

    What is the pressure of the gas if 0.145 mol occupies 227 mL at 35°C?
  90. Chemistry

    how much chloride ions does 10.00 mL of .500M BaCl2 have?
  91. Chemistry

    how do arrangement of particles changes during a phase change
  92. Chemistry

    Calculate the approximate concentration of 41 mL of 6 M diluted to about 0.95 L of water?
  93. chemistry

    0.058 moles of NH3 weighs how much grams?
  94. chemistry

    what difficulty must be overcome when mixing water and margarine? why?
  95. chemistry

    Can you make a compound and show the electrons for magnesium and sulfur
  96. Chemistry

    If 10.0g of Pb at 25.0oC absorbs 1.00kJ of heat, what is it's final temperature?
  97. Chemistry

    Discuss the formation of the nickel ion with a 2+ oxidation number.
  98. AP Chemistry

    What is the Dumas Method in regards to the molas mass of a gas?
  99. chemistry

    How do u solve this calculate the mass of (NH4)2SO4 if 16 g H is used
  100. Chemistry

    What is the molarity of 350 mL of solution that contains 27 grams of CaCl2?
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100