chemistry! URGENT

61,546 results, page 61

  1. chemistry

    What is the wavelength of a 2500 kg truck traveling at a rate of 70 km/h?
  2. chemistry

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

    What is the electron-domain (charge-cloud) geometry of
  4. Chemistry

    Which is a polar covalent bond? PbCl2 or CS2?
  5. Chemistry

    20 degrees C is 6 g Cu So4/25 g H2O is this saturated or unsaturated?
  6. chemistry

    The pH of an HCl solution is found to be 1.74. Therefore the [H3O+] is:
  7. chemistry

    You have a 0.0825 M solution of HCl. You expect the pH to be
  8. chemistry

    Phenolphthalein turns __________ when the solution is basic.
  9. chemistry

    What is the mass percent oxygen in the compound NaNO3?
  10. chemistry

    pH is defined as 10^-log [H3O+] True or False
  11. chemistry

    How many grams of na cl are required to make 500ml of a 0.65 percent w/v
  12. Honors Chemistry

    What is the Lewis dot diagram for C2Cl2?
  13. chemistry

    if 2.2g of h2 and 1.25g of n2 are present, how many grams of nh3 will be produced
  14. chemistry

    What mass of ZnCl2 is needed to make 4 L of 1.8 M solution?
  15. chemistry

    who made (arranged) the modern periodic table?
  16. chemistry

    How could I determine if a white liquid contained lactose?
  17. chemistry

    What are the steps of protein synthesis starting with DNA?
  18. chemistry

    how can you tell if a reactant is being oxidized or reduced
  19. chemistry

    how can you tell if a reactant is being oxidized or reduced
  20. Chemistry

    Is this reaction exothermic or endothermic? Fe(NO3)3+ NaSCN
  21. chemistry

    liters in 2.39x10^23 molecules of nitrogen triiodide
  22. chemistry

    what is some background on the ideal gas constant R
  23. chemistry

    does caco3 can easily pick up moisture from the surroundings?
  24. chemistry

    find Equimolar ratio of HClO2 & NaOH
  25. Chemistry

    Why is bond energy defined only for gases?
  26. chemistry

    How do you calculate the mass, in amu of 2287 atoms of Li
  27. Chemistry

    Why does it take more energy to remove a electron from Al+ than from Al?
  28. chemistry

    What is the mass of 4.54 10-2 moles of zinc chloride (ZnCl2)?
  29. Chemistry

    Calculate the enthalpy change at 300kalven for the reaction?
  30. chemistry

    what is the procedure that is used to find actual yield?
  31. Chemistry

    What is the formula for Celsius and Kelvin scales for temperature?
  32. chemistry

    If 50.0 g of Ba(CN)2 reacts to produce 12.9 g of HCN, what is the percent yield?
  33. chemistry

    Calculate the number of moles in 35.7 grams of Na3PO3
  34. Chemistry

    How many moles of atoms are in one mole of AlPO4?
  35. chemistry

    how many significant figures does the sum of 8.520 the 2.7 contain?
  36. chemistry

    why are the atoms in metallic bonds positively charged?
  37. Chemistry

    What happens to the valence electrons in metallic bonds?
  38. Chemistry

    What is the energy of a mole of UV photons having a wavelength of 11 nm?
  39. chemistry

    In formula for where ferenheit and celsius converge (T = T x 9/5 +32); what is the logic that T x 9/5 = T + T = 4/5?
  40. Chemistry

    Benzene burns with intense smoky flame,this is b/c ?
  41. Chemistry

    How many grams of CO2 are formed when 32 g of O2 reacts with 23 g of C2H5OH?
  42. Chemistry

    which is more soluble in water: cyclohexane or glucose?
  43. chemistry

    Determine the boiling point of water at 698.5 mm Hg.
  44. chemistry

    what is the heaviest element with a single letter symbol?
  45. Chemistry

    What is the pH of a 0.01M solution of arginine that has a net charge of -.65?
  46. chemistry

    What would happen if O2 were added to N2(g) + O2(g) 2NO(g) at equilibrium?
  47. Chemistry

    1/2.165 = sqrt x/131.29. I am not sure how to solve for x.
  48. Chemistry

    Indicate which of the following quantum numbers are unacceptable: (a)(1,2,0,1/2) (b) (3,2,0,1/2) (c)(3,2,2,1) (d) (4,3,2,-1/2)
  49. CHEMISTRY

    What happens to the NH4+ and Cl] ions when they enter the water
  50. chemistry

    how many grams are contained in 500.g of a 25% solution of H2SO4?
  51. chemistry

    how many moles of oxygen are required for the combustion of 25.5 g of magnesium
  52. chemistry

    203.77miles/sec is converted to cm/nsec
  53. chemistry

    what did amedeo avogadro contribute to the atomic theory?
  54. physics/chemistry

    is conductivity a physical or chemical property
  55. chemistry

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

    A detergent solution has a pH of 11.63 at 25°C. What is the hydroxide-ion [OH-] concentration?
  57. Chemistry

    How do you draw a lewis dot structure of s3o
  58. chemistry

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

    A Solute That Removes Hydrogen Ions from Solution
  60. Chemistry

    What compounds can be formed by the reaction of K2SO4 and BaCI2?
  61. chemistry

    calculate the pH of 20.00mL of 2.00 M HCl diluted to 0.500 L
  62. chemistry

    what isw the density of N2O,a gas at STP?
  63. chemistry

    How do you balance a chemical reaction word equation?!
  64. chemistry

    Which has the higher boiling point? (a) CH3CH2CH2CH2CH3 or (b) CH3CH2CH2CH2CH2CH2CH2CH3
  65. chemistry

    questions related to yield of chemical reaction.
  66. Chemistry

    Calculate the [H+], [OH ‾ ], and the pH of 0.16 M solutions of: hydroxylamine (HONH2, Kb = 1.1 10-8)
  67. chemistry

    how many moles of suctose are in 0.8L of a 2M solution? How many molecules of sucrose is this?
  68. chemistry

    What would happen if O2 were added to N2(g) + O2(g) 2NO(g) at equilibrium?
  69. Chemistry

    How many mL of 5.5 M KOH are needed to prepare 300 mL of 1.2 M NaOH?
  70. Chemistry

    Consider a solution containing 0.150 M Ba(OH)2. Calulate the pH.
  71. chemistry

    Mr=112.11 and 0.146mg/mL how do I change thiss to mmol/L
  72. chemistry

    please give me an example of a nanocomposite material
  73. chemistry

    The approximate pH of a 3.0 x 10-3 M solution of the strong acid H2SO4 is a) 3.5 b) 3.0 c) 2.5 d) 2.2 e) -3.0 how do you do this?
  74. chemistry

    The Ka for HOBr is 2.4 x 10-9. Thus, you can report the pKb for OBr– as a) 4.2 x 10-6 b) 9.62 c) 5.38 d) 8.62 e) 1.38 help!
  75. Chemistry

    Which one is the LR? Ag or S? 2Ag + S → Ag2S = 216 g Ag + 32 g S
  76. chemistry

    Write a balanced reaction for the formation of Fe2O3 (s)?????
  77. chemistry

    v=555mL at 1.00 atm. what is the volume at 689 torr?
  78. Chemistry

    So,my second method is correct isn't it? The answer is -78.4kJ?
  79. Chemistry

    How many mL of 3.0 M HCL are required to neutralize 250 mL of 2.0 M MgCL2 ?
  80. Chemistry

    Lewis Structure of Freon (CCI2F2)? And what is shape?
  81. Chemistry

    Empirical formula 12.67 aluminum, 19.73 nitrogen, 67.60 oxygen
  82. chemistry

    What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?
  83. chemistry

    make 98.5 mL of 1.25 M barium nitrate from a 4.50 M solution. i do not know what to do with this information
  84. Chemistry

    How many moles of O are there in 32.4g N2O5, how many oxygen and nitrogen atoms are there in the 32.4g?
  85. Chemistry

    What is the pH of 1.0M Na2SO3 (aq)solution at 25C? a) 3.40 b) 6.03 c) 10.60 d) 7.96 e) 10.40 How can I get ph from only the Molarity?
  86. chemistry

    write the oxidation and reduction half reactions for mg+au^+---->mg^2^++au
  87. Chemistry

    How many moles of C2H2 are produced by 3.5 mol CaC2?
  88. Chemistry

    How can you determine which colorless liquid is less dense?
  89. Chemistry

    How many mL of .48 M NaOH are needed to react with 2.00 moles of H3PO4?
  90. Chemistry

    Attn: Dr. Bob Thank you so much for your help on this--greatly appreciated!
  91. chemistry

    Is calcium oxalate, CaC2O4, soluble in water?
  92. chemistry

    what is the density of carbon dioxide at 26.5 degrees C and 755 mm Hg?
  93. Chemistry

    Are the concentrations of CO, H2O, CO2 and H2 necessarily equal
  94. chemistry

    give at least 3 atoms with its isotopes and its application?
  95. Chemistry

    what are the rules used to determine the solubility of salt?
  96. chemistry

    What is the volume of 2.8 × 106 molecules He? Answer in units of L
  97. chemistry

    What is the density of propane (CH3CH2CH3) gas at 25°C and 65.0 cm Hg? (1atm=76 cm Hg)
  98. chemistry

    how to explain that HCL is a stronger acid than HOCL?
  99. chemistry

    If 2.3 mol of has a volume of 1.1 L at 289 K , what is the pressure in atm ?
  100. chemistry

    How many moles of ions are contained in 1.4 L of a 1.6 M solution of Mg(NO3)2?
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