chemistry! URGENT

61,546 results, page 47

  1. chemistry

    Find the entropy of mixing of 80% N2 and 20% O2 in air
  2. chemistry

    What is the formula weight for Epsom salt?
  3. Chemistry

    What is the definition of Gay-Lussac's law?
  4. Chemistry

    What is the freesing point for ethanol and methane
  5. Chemistry

    What is the freesing point for ethanol and methane
  6. Chemistry

    How many d electrons are there in MnO4-? please explain.
  7. Chemistry/Science

    Can a reaction order be negative?
  8. Chemistry

    0.60 mol of steam condenses at 100°C
  9. Chemistry 12

    Why doesn't stirring not affect solution equilibrium??
  10. CHEMISTRY

    Explain working of a desert cooler?
  11. chemistry

    222g of oxygen contains how many moles?
  12. chemistry

    how many moles of CO2 in .05M solution in .2L?
  13. Chemistry

    which is the stronger acid, HIO4 or HBrO4?
  14. chemistry

    what is the temprature at which molecular motion ceases??
  15. chemistry

    calculate for strong electrolyte the ph of 0,1M pf HNO3
  16. chemistry

    calculate for weak acid with ph 0,1M of CH3COOH (K=1,8*10-5)
  17. chemistry

    How could you separate lauric acid from a-naphthol?
  18. Chemistry

    How many moles of precipitate were recovered from BaCro4?
  19. Chemistry

    convert 39C fever to fahrenheit
  20. Organic chemistry

    2- butanol + 2-pentanoic acid
  21. chemistry

    what is the activity of water at 11bar and 298k
  22. Chemistry

    What is the pH of a solution with a concentration of 4.7 × 10-4 molar H3O+?
  23. Chemistry

    What is the theoretical molarity value of HCL
  24. chemistry

    how many gram molecules are present in 4.9g of H2SO4
  25. Chemistry

    How much HNO3 can be made from 25.0g of NO2?
  26. chemistry

    If there are 35 drops in 1 mL, how many microliters are there per drop?
  27. chemistry

    If there are 35 drops in 1 mL, how many microliters are there per drop?
  28. CHEMISTRY

    What is the concentration in normality of NAOH (19.5CM3)
  29. chemistry

    what is the weight of calcium acetate at 0.1,0.2,0.3,0.4,0.5 molality?
  30. chemistry

    i have aproblem in balancing equations
  31. chemistry

    ionic strength of barium chloride?
  32. chemistry

    will potassium chloride react with bromine
  33. Chemistry

    how many grams are in 12.5 moles of chlorine (gas)?
  34. Chemistry

    300 ml of a 0.5NKOH solution, how can it be neutralized
  35. chemistry

    what is the substance in a solution that gets dissolved
  36. chemistry

    what is the volume of a rectangle that has a mass of 19.0 and a density of 10.50 g/mL
  37. chemistry

    Re-post ? [H3O+] in 0.15 M C2N2H8 and 0.35 M C2H2H9Cl; Kb= 4.7 x 10^-4
  38. chemistry

    why do you use Na2Co3 extract of anions
  39. chemistry

    show how to convert: 0.0023hm to micrometers
  40. chemistry

    how many calories are lost when 15.0 ethanol,cools from 58.5 to -42.0
  41. Chemistry

    What is the chemical name for BeCrO4*5H2O?
  42. organic chemistry

    What is the general formula of cycloalkane ?
  43. chemistry

    Which of the following will result in a chemical change?
  44. Chemistry 12

    How to draw the structural diagram of 2,3 dichlorohexane
  45. chemistry

    Find the concentration of Cu+ in equilibrium with CuBr(s) and 0.10 M Br-.
  46. Chemistry

    Simplify the following expressions. 15. 5 (5w-4w)/10 17. 6a X 5b^2/3a^3 20. (4f + 13g) (2w)
  47. chemistry

    Hypothesis on "behavior of solids on warming".
  48. chemistry

    how many grams of O2 may be produced from 50g of KClO3?
  49. chemistry

    how do you determine the last digit in any measured number?
  50. Chemistry

    6000 millimeters equal how many meters?
  51. chemistry

    what do you mean by parts per million?
  52. Chemistry

    How many oxygen atoms are in 3.20g of quartz?
  53. Chemistry

    What is the formula mass for (NH4)3PO4
  54. Chemistry

    Li(s) + N2 6Li(s) + N2 ==> 2 Li3N Li =6. Li =6 N= 2. N =2 Am I correct now
  55. Chemistry

    What shell contains a total of 16 orbitals? A. n = 1 B. n = 2 C. n = 3 D. n = 4 E. n = 5
  56. chemistry

    what mass of water can be obtained from 4.0g of H2 and 16g of O2?
  57. pre ap chemistry

    how many CaI2 are presented in 3.28 moles?
  58. Chemistry

    NaCl is soluble in water, but I2 is not. Explain
  59. Chemistry

    C3H6O + 4 O2 ¨ 3 CO2 + 3 H2O how many coefficients?
  60. chemistry

    How many moles are in 1.18g of 4.7x10^-4 M AgNO3?
  61. Chemistry

    3.4 L at 328 torr and 37 Celsius how many moles are there?
  62. chemistry 12

    Is HOCl(aq) a polyprotic acid? Explain
  63. chemistry 12

    Calculate [H3O+] and [OH-] in 0.22M KOH(aq)
  64. organic chemistry

    how could you obtain benzaldehyde from toluene?
  65. Chemistry

    When a solution is made from 1.0 g of KI and 90 mL of water, what is its molarity?
  66. chemistry

    calculate the amount of camphor ( in moles)
  67. chemistry

    why 1/t represent k in iodine clock reaction
  68. chemistry

    what is the oxidation number for sulfur in K2S2O8
  69. chemistry

    what is the geometry around the carbon in dichloromethane?
  70. chemistry

    difference between cations and anions
  71. General Chemistry 1

    What is the FBF bond angle for BF^4- ?
  72. chemistry

    how many hydrogens would there be in 2,5,6 trimethylnonane and how do you find them
  73. chemistry

    how do you find how many hydrogens there would be in 2,5,6 trimethylnonane?
  74. chemistry

    What mass of CO2 can be absorbed by 36 g of LiOH?
  75. Chemistry

    What is the Lewis structure of the Pb2+ion?
  76. chemistry

    Ammonia gas is dried using
  77. chemistry

    Calculate the % by mass of carbon in octane
  78. chemistry

    DOES H3PO4 HAVE A pH greater than 7 or less than 7
  79. Chemistry

    Is the formula for zinc hydroxide ZnOH2
  80. chemistry

    A salt is obteind as a reaction between
  81. chemistry

    calculate 5.7 grams PbCl2= ions Cl-1
  82. chemistry

    will someone please help me on dimensional analysis
  83. chemistry

    What is the solubility of silver carbonate in 0.1 M Na2CO3
  84. chemistry

    Show me how to calculate the mass of 20.0 moles of He?
  85. Chemistry

    how much sodium is in 1.80 grams of Na3PO4
  86. Chemistry

    At 40 c,the value of Kw is 2.92 10-14.calculate the [H+] and [OH-] of pure water at 40 c.
  87. chemistry

    How many molecules are in 3.78 moles of carbon dioxide?
  88. Chemistry

    is H2S2O7 or H2SO4 a stronger acid?
  89. chemistry

    what is the osmolarity of 0.35M KBr? how to set it up.
  90. Chemistry!!

    Calculate the pH of 10.00 mL of 0.40 mol/L of hydrochloric acid.
  91. chemistry

    what chemical is produced by habers process
  92. chemistry

    What is the molarity of OH- in an aqueous solution that is 0.31 M HNO3?
  93. chemistry

    What is the molarity of OH- in an aqueous solution that is 0.17 M HClO4?
  94. chemistry

    How many grams of NH3 can be made from 375g of N2?
  95. chemistry

    How many grams of N2 are needed to react with 125g of H2?
  96. chemistry

    In the Ideal Gas Law, where PV = nRT, R is ?
  97. chemistry

    What are conjugate acid-base pairs
  98. chemistry

    If we have a solution in which the [OH -] = 3.3 x 10-4, then the [H3O+] must be
  99. chemistry

    When K2SO4 is mixed with water, we expect:
  100. chemistry

    A particular solution has a [H3O+] 2.44 x 10^-4. Therefore, the [OH-]= 4.10 x 10^3 4.10 x 10^-11 2.44 x 10^-4 1.71 x 10^-8 9.09 x 10^-16
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