CHEMISTRY (WEBWORK)

59,669 results, page 18

  1. chemistry

    Why can water dissolve so many substances?
  2. chemistry

    im confused with significant numbers how do you do them.. like for example 64 mL
  3. chemistry

    How did dalton discover the atom?
  4. chemistry

    the oxidation number of Mo in Na2MoO4 is what?
  5. Chemistry

    Can pi bonds be made from d-orbitals?
  6. chemistry

    why are ions of physiologic importance?
  7. chemistry

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

    why is MgCI salt likely to not exist?
  9. Chemistry

    N2(g) + 3H2(g) ⇌ 2NH3(g) ΔH° = −92 kJ ΔS° = −0.20 kJ/K Which of the given is correct about the ΔG° at 35 °C? A. 30 kj B. -62 kj C. 62 kj D. -30 kj
  10. Chemistry

    how many moles of Cl in 2.7 mol CaCl2
  11. chemistry

    How many grams of Al will react with 3.00 mol of 0(2)?
  12. CHEMISTRY

    What is the oxiden number of NO2?
  13. Chemistry

    What is the oxidation states for K2CrO4
  14. Chemistry

    Are there any disadvantages of a mass spectrometer
  15. Chemistry

    How would you prepare 100 ml of 0.9% w/v saline?
  16. Chemistry

    What is the percentage of nitrogen in N2O?
  17. chemistry

    what is the general formula for a hydrate?
  18. Chemistry

    what is the OH- concentration of 0.08 M solution of CH3COONa
  19. Chemistry

    What are vinyllic organohalides? How would you be able to identify them? Thanks
  20. Chemistry

    How would you prepare 100 ml of 0.9% w/v saline?
  21. chemistry

    hydrogen may not be advantagous as a fuel because
  22. chemistry

    Say some exples for true solutions.
  23. chemistry

    how to prepare 24 μL of 5% H3BO3
  24. chemistry

    why potassium permegnate is colourd
  25. chemistry

    how many gram of h2 needed to react with 3.10 n2
  26. chemistry

    how many gram of h2 needed to react with 3.10 n2
  27. chemistry

    What is the percent composition of O in C8H8O3
  28. Chemistry

    What does it mean when we say that KHC8H4O4 is not hygroscopic ? thank for helping~
  29. chemistry

    How many grams of calcium nitrate,
  30. chemistry

    why we not use HNO3 and HCl in iodometry
  31. Chemistry

    What is the final concentration if 27.08 (MW: 36.46) dissolved in 55.51 ml?
  32. Chemistry

    Balance KCLO3 ---> KCl + O2
  33. chemistry

    what is the equation for gamma decay?
  34. CHEMISTRY

    HOW MANY MOLES OF CALCIUM IS 139g OF Ca?
  35. chemistry

    whats an example of hydrogen bonding?
  36. CHEMISTRY

    HOW MANY GRAMS OF CALCIUM IS 3.08 MOL OF Ca?
  37. PLEASEE HELP CHEMISTRY

    What is partial pressure?
  38. Chemistry

    What happens when soda ash is heated?
  39. Chemistry

    Chapter 3 41. How many significant figures are in each?
  40. Chemistry

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

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

    what is the mass percentage of Na in Nacl
  43. CHEMISTRY

    HOW MANY MOLES OF LITHIUM IS 2.69XE9
  44. Chemistry 011

    what does Molar Mass mean?
  45. chemistry

    calculate the pH of 5M aqueous ammonia. Given kb=1.8 x 10^-5
  46. CHEMISTRY

    ^H FOR CS2+3O>CO2+2SO2
  47. Chemistry

    What are the types and benefits of phytochemicals?
  48. chemistry

    how many moles of H2 are produced from 5.0M H2SO4
  49. chemistry

    A 14.0g of N2 occupies what volume atSTP
  50. chemistry

    why do gases mix in any proportion?
  51. Chemistry

    What is the relationship of the concentration of H3O and of OH
  52. chemistry

    222g of oxygen contains how many moles?
  53. Chemistry

    Is esterification a condensation reaction?
  54. CHEMISTRY

    Name of CH3CH(Br)CH=CHCH(CH3)2.
  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 is the molar number of PbI2
  57. Chemistry

    Balance the equation: Br2 +KI=
  58. chemistry

    why photosynthesis is considered as endothermic?
  59. AP Chemistry

    Convert 8.3×10^5 cal to kiloJoules
  60. Chemistry

    What is the vapor pressure of ethanol at 13 C?
  61. chemistry

    the # of protons in an atom of sodium-23 is
  62. chemistry

    the # of electrons in an atom of Iron-56 is
  63. chemistry

    how can the purity of water be established?
  64. chemistry

    When 25.0 g of Zn reacts,how many L of H2 are formed at STP?
  65. chemistry

    Why are KMnO4 filtered before they are standardized?
  66. chemistry

    how many moles of platinum are equivalent to 1.20 x 10^24
  67. chemistry

    What is the mass, in grams, of 3.57×10^−2 ?
  68. Chemistry

    Why are some substances not able to dissolve in water?
  69. Chemistry

    Fe 3+ + scn- + Na2PHO4 produces what exactly?
  70. chemistry

    What is the volume in milliliters of 7.24 {\rm g} of acetone?
  71. chemistry

    how many significant figures does 221.5 have
  72. Chemistry

    Why would it be better to titrate a solution rather than just dilute it?
  73. chemistry

    when will a displacement reaction not occur?
  74. Chemistry

    what is 39.5 grams of HCl in moles?
  75. Chemistry

    Describe electron delocalization.
  76. Chemistry

    Pine trees have a pH range of what ?
  77. Chemistry

    Why is it better to use titration rather than just diluting something in some circumstances?
  78. Chemistry

    How many liters are in .005 moles?
  79. Chemistry

    how many electrons are in 3.70 x 10^23 atoms of carbon 13?
  80. chemistry

    how many CO molecules do you need to react with water
  81. Chemistry

    What is electron configuration of Bi5+?
  82. chemistry

    FeCI3(aq)t koh(aq) fe(oh)3(s) t kci(aq)
  83. Chemistry

    Why is Hydrogen sulfate amphiprotic?
  84. chemistry

    What are the main contaminants likely to be in your soap?
  85. chemistry

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

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

    How many orbitals in an atom can have each of the following designations? (a) 3p (b) n=1
  88. chemistry

    determine the i value for kcl solution
  89. Chemistry

    Convert 1.445 +104m to km
  90. chemistry

    Why vaporization is a cooling process ?
  91. Chemistry

    What is the uncertainty (+/- ?) of molar concentration (M)?
  92. Chemistry

    What is the solubility of calcium cholride
  93. chemistry

    stable nuclides are those whose N/P ratio is a) >1 b)<1 c)2 d)1
  94. Chemistry

    ph of a 0.234 m nahco3 solution look up the appropriate ka or kb value
  95. chemistry

    how to find percent yield
  96. chemistry need it proofread..

    and we had to round this was the question
  97. Chemistry

    The solubility of copper sulphate at 0 C
  98. Chemistry

    What are the products of Ba(NO3)2(aq)+K2CO3(aq)?
  99. chemistry

    How many moles of S are there 350 g of H2SO4?
  100. chemistry

    why does a solution of ammonium acetate has a pH=7.5
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