CHEMISTRY (WEBWORK)

59,669 results, page 15

  1. Chemistry

    What are the isomers of chlorobromobenzene
  2. Chemistry

    DrBob, if you're still on...what do I do for NaCl??
  3. chemistry

    How do I figure out the mass of 1 M&M?
  4. chemistry

    Please help!!! Desperate for answer!!!? Did the equation do not know the 2nd questions"s answers for the problems a) 2O3(g) = 3 O2(g) + heat (O3 IS UNDERLINED) [6.0x10-1] [0.21] b) 2 CO2 (g) + heat = 2 CO(g) +O2(g) (CO IS UNDERLINED) [0.103] [0.024] [1.18 x10-2] c) NO2(g) + O2...
  5. Chemistry

    Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would ...
  6. Chemistry

    What is the pressure (in atmospheres) of the gas inside the container connected to an open-end, mercury-filled manometer as shown in the picture? The atmospheric pressure is 0.95atm. l----l | (G) l | l - --- l Hg l Hg *18cm - - --- Hg Hg HgHgHgHg what process do I use to solve...
  7. Chemistry

    Please read to the bottom - This help was wonderful and absolutely correct, I'm asking a bit more regarding the same question, please read below. Imagine that you have been asked to prepare 500ml of a 0.25 mol L solution of Sodium Hydroxide, NaOH. Describe how you would ...
  8. chemistry

    Posted by lyne on Tuesday, March 25, 2008 at 11:44pm. What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is "large", and the second is finite, and the [H+] donated by the second equilibrium depends upon the ...
  9. Chemistry

    Manufacturing of Freon (CCl2F2): 2 HF(g) + CCl4(I) --> CCl2F2(g) + 2 HCl(g) Supplies on hand: 1.0kg HF and 1.0 kg CCl4. After the reaction was conducted, 0.44kg CCl2F2 was measured in the lab. 1) What is the theoretical yield of Freon? 2) What was the percent yield? 3) What...
  10. Chemistry-DrBob222

    A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting solution freezes at...
  11. chemistry

    help!!!! is this the answer to B ) C2H5OH(liq)+ 3O2(g) --> 2CO2(g) +3H2O(liq) In winemaking, the sugars in grapes undergo fermentation by yeast to yield CH3CH2OH and CO2. During cellular respiration, sugar and ethanol are "burned" to water vapor andCO2. Write a combustion ...
  12. chemistry

    I have two solutions of 0.1 Molar. A solution of magnesium chloride and a solution of potassium chloride. I thought that the 0.1 M solution of magnesium chloride would conduct electricity better than a 0.1 M solution of potassium chloride. I did a lab in my chemistry class but...
  13. Chemistry

    For chemistry I am supposed to convert 0.001 348 grams to milligrams. I know how to convert grams to milligrams, but I don't get what's with the 0.001. Does this mean it should be .348 grams to milligrams (multiplying by .001??) Thanks
  14. Chemistry

    Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surroundings. As part of your chemistry lab class, you have to build a safe and effective potato gun to ...
  15. Chemistry

    Suppose it is a hot summer day (40.0 degrees C = 104.0 degrees F), and you have left a can of hairspray outside so the gas within it is now at the same temperature of its surroundings. As part of your chemistry lab class, you have to build a safe and effective potato gun to ...
  16. Chemistry-DrBob222

    Is the answer for part c 0.91? A 1.0 L ball containing Ar at 5 atm is connected to a 10.0 L ball containing N2 at 2atm. A)Calculate the partial pressures and mole fractions of Ar and N2 after the valve is opened and the gases are allowed to mix (they fill the balls on both ...
  17. Chemistry(Please help!!)

    For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
  18. Chemistry

    For a chemistry lab the experiment was to carry out an acid-base titration to determine the exact concentration of a sodium hydroxide solution. Two trials were completed and the data collected was: mass of weighing paper, mass of weighing paper + KHP, mass of KHP, initial ...
  19. chemistry

    Hi. I have a little problem with my chemistry task. I have 4 unknown solutions: 1 light blue (A),1 green (B), 2 without colour (C & D). As I understood that the blue one is CuSO4, green one is NiCl2, but 1 uncoloured is NH3, then... A - CuSO4 [couldn't ir be Cu(OH)2?] B - ...
  20. chemistry

    The equilibrium constant Kc for the reaction C <--> D + E is 7.90 * 10^-5. The initial composition of the reaction mixture is [C]=[D]=[E]=1.10*10^-3. What is the equilibrium concentrations of C, D, and E? C=? D=? E=? chemistry - DrBob222, Monday, November 5, 2012 at 12:...
  21. Chemistry

    What data led to the development of the Law of Multiple Proportions? Give an example and explain why this law is important in chemistry. Would this be a good answer: John Dalton used the same observations he used for his law of definite proportions to help develop the law of ...
  22. Chemistry

    See bottom Patrick A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0 grams of water the resulting ...
  23. Chemistry

    What is the hybridization of both carbons in: C=CH2 ?
  24. Chemistry

    If 30 ml of 02 M HCL with 45 ml what is the molarity of NaOH
  25. Chemistry

    What counts as a conversion factor ?
  26. chemistry

    why is CCl4 classified as a compound?
  27. Chemistry

    How many mL of 1.2 M HCl is needed to react with 5.8 g of Al(OH)3
  28. chemistry

    what substances form if we add 3 O 1 Na 1 C and 1 H
  29. chemistry

    how to find mass percentage
  30. chemistry

    you need a solution of 195 mg/dL., what would it be in g/L? [1g=1000 mg, 1L=10 dL]
  31. chemistry

    why must a clean rod be used each time?
  32. Chemistry 101

    what is CAH2 + H20
  33. chemistry

    what is not viewed with an electron microscope
  34. Chemistry

    How many significant figures are there in 0.00236 I think its 5, anyone can help
  35. chemistry

    45.0 ml of 9.0x10 the negative 2m hno3
  36. Chemistry

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

    how i can prepare 0.6M H3PO4(250ml).
  38. chemistry

    what are two regions make up all atoms?
  39. Chemistry

    Is air a mixture or a coumpound?
  40. Chemistry

    how many gram of Cl are in475g of CaCl
  41. chemistry

    What is the volume of 2.10 lb of ethylene glycol?
  42. Chemistry

    what is the % of mass of 50.0g of solute in 45.0g of water?
  43. Chemistry

    how do Al and Cl ionically bond with each other? I think its AlCl3 am i right?
  44. Chemistry

    I NEED TO KNOW ASAP what a Keq is and what the formula of it would be.
  45. chemistry

    Why is ice used during the sublimation process?
  46. Chemistry

    What is the percentage of nitrogen in N2O?
  47. Chemistry

    What is the balanced equation for Ba(OH)2 + HCl?
  48. Chemistry

    Convert 125000 Pa to psi
  49. Chemistry

    How do we use 2 indicators to confirm the pH of a solution?
  50. chemistry

    would NBr3O be polar or nonpolar?
  51. Chemistry

    What does it mean to have a percent yield over 100?
  52. chemistry

    what is the bond order of oxygen
  53. CHEMISTRY

    hOW TO PREPARE HCL SOLUTION OF 5-7 pH.
  54. Chemistry

    What would cause the molecules of gas to get closer together?
  55. chemistry

    pH of HF 5.3*10^-2 M Since HF is a weak acid, I'm not sure which formula to use.
  56. chemistry

    What is the molality of 67.1g of Nano3 in 2.5l of water
  57. Chemistry

    Why air is classified as matter?
  58. Chemistry

    what is the formula to change the temperature of K to C
  59. Chemistry

    37 grams of Ca(OH)2 in 500 ml of solution is
  60. chemistry

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

    what is the formula for magnesium with Nitrogen
  62. Chemistry

    What is the suffix for an alcohol which contains more than three -OH groups?
  63. chemistry

    examples of suspension and solution
  64. chemistry

    list 3 different cell shapes
  65. chemistry

    What is the product when ethanol is oxidized?
  66. chemistry

    what does the spectrum of hydrogen tell us about its electrons?
  67. chemistry

    Volume of 0.185 mol . L-1 and 0.74 M
  68. Chemistry

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

    What happens to the pH of an acidic solution when it is heated
  70. Chemistry 105

    How many mL of O2 will form from 55.2g KClO3?
  71. chemistry

    3 molecule of water contains how many grams?
  72. chemistry

    How many moles are there in 4.76e24 atoms Al?
  73. Chemistry

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

    define a chemical bond
  75. chemistry

    How many atoms are contained in 8.8 g of CO2?
  76. chemistry

    Why vaporization is a cooling process ?
  77. chemistry

    how to prepare 0.216M of 37%benzaldehyde
  78. chemistry

    At what temperature (in ) does acetone have = 102
  79. chemistry

    What are the total grams of iron
  80. chemistry

    chemical reactions type?
  81. science

    write aout chemistry
  82. Chemistry

    What is enthalpy in layman's terms?
  83. Chemistry

    How would you find the Kb of a weak base??
  84. Chemistry 101

    How many kg of chlorine are in 23 kg of CF_2Cl_2?
  85. Chemistry

    What is the mass of Na in 20g of Na2Co3
  86. chemistry

    Balance point of HCL
  87. chemistry

    how many atoms in 8.87g of silver
  88. Chemistry

    Find the Ph of solutions with the concentrations 1.15 x 10^-6M
  89. Chemistry

    0.00267m= how many nm? please show me how to set this up. thanks!
  90. DrBob222

    I really need help on these chemistry problems. Can you please help me work them. Please?
  91. chemistry

    why does a solution of ammonium acetate has a pH=7.5
  92. chemistry

    find the percent of BaBr^2*4H^2O
  93. chemistry

    PH of gatorade and body sweat
  94. Chemistry

    Will ph value of water be same at temp 25°C & 4°C? Justify it.
  95. Chemistry

    Will ph value of water be same at temp 25°C & 4°C? Justify it.
  96. Chemistry

    Will ph value of water be same at temp 25°C & 4°C? Justify it.
  97. chemistry

    what is the vapor pressure of ethonal at 75°c?
  98. Chemistry help

    hcl+mg(oh)2->mgcl2+h20
  99. chemistry

    What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10-10
  100. chemistry

    1 atmosphere of pressure is equivalent to
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