chemistry! URGENT

61,713 results, page 36
  1. chemistry

    is a element an atom?
  2. Chemistry

    NaHCO3 (s) + HC2H3O2 (aq) ---> ?
  3. chemistry

    what is the structure of OF anion?
  4. chemistry

    What is equlibrium position
  5. chemistry

    what is the disadvantage of nh4oh
  6. Chemistry

    What is gaseous state?
  7. Physical sciences(chemistry)

    Do not know it
  8. Chemistry

    Please help, if you can. If you have a Log (x) = -0.123 ..... What does x = ?
  9. Chemistry

    name the ions: Ag+ and P-3... and it's not silver..
  10. chemistry

    What is the eq.wt of C7H6O3 and why ??😊
  11. chemistry

    What is the eq.wt of C7H6O3 and why ??😊
  12. chemistry

    what is the solidification for water?
  13. chemistry

    what is the correct name for k2o
  14. Chemistry

    How do I decide whether something is polar or not?
  15. chemistry

    preparation of N/10 NaoH
  16. Chemistry

    Which of the following is a reactive gas? 1. Cl 2. Na 3. Au 4. Ra 5. Rn Is it 1. Cl?
  17. Chemistry

    Which of the following is an unreactive metal? 1. Na 2. Au 3. Rn 4. Ra 5. Cl Is it 2. Au?
  18. chemistry

    what is 200grams-1000cm3? please help me!
  19. chemistry

    what are electrostatic forces
  20. chemistry

    K(s)+NH3(g)→ ?
  21. chemistry

    what is a sigma bond
  22. Chemistry

    How many moles are in 1.64 g hclo
  23. chemistry

    so is is set up like 356.2J=25.0g(36.5C-22.0C) ?
  24. Chemistry

    How many electrons in an atom can have n=3, ml=+1 and ms=+1/2
  25. chemistry

    Why you did not use the 50 ml given in the problem instead you use 1000?
  26. Chemistry

    Starting with S = kB * ln W Derive S = (U(T) - U(0)) / T + N * kB * ln q(T)
  27. chemistry

    what is an example of a solid hydrocarbon
  28. chemistry

    Please convert 5005 mL to L. Thank you.
  29. Chemistry

    What is the numerical value of one mole?
  30. ap chemistry

    How many grams of ammonium
  31. Chemistry

    What is the OH- concentration of a solution whose pH is 12.40?
  32. Chemistry

    A sodium cation is what?
  33. chemistry

    conver 0.100Kg to g
  34. chemistry

    How many mililmeters(mL) are in a sample with 2.0L?
  35. Chemistry

    what was the first sample in the ChemQuandry and where is it used
  36. chemistry

    Why you did not use the 50 ml given in the problem instead you use 1000?
  37. chemistry

    conver 0.100Kg to g
  38. chemistry

    what are three examples of a hypothesis? Or at least one....
  39. chemistry

    Na2CO3 NaCl
  40. chemistry

    How would you prepare 1. 100 ml of 0.20 M Ca(OH)2 from 0.50 M Ca(OH)2
  41. Chemistry

    How do you draw Al2 + O2
  42. CHEMISTRY

    NAME OF COMPOUND- CH3CHCL2
  43. chemistry

    Please, convert 5005 mL to L
  44. chemistry

    how to do a research paper
  45. Chemistry

    Boiling occurs when?
  46. chemistry

    If we have a concentration of H+ at 5 x 10-2 mol/L, what is the pH value? A. -1.30 B. 0 C. 1.3 D. 2.6
  47. Chemistry

    Pb(C6H2O2)2+KCl= ???
  48. Chemistry

    Alternative answers: A)10 B)13 C)1.9 D)3.8 E)12
  49. chemistry

    how is this express understood 40 w/v
  50. chemistry

    if I have 0.0899 g/L what would it be for grams per mL?
  51. Chemistry

    Li2SO4+AgNO3= ???
  52. chemistry

    what is 0.2505 to 3sf????
  53. 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
  54. PHYSICS URGENT

    dT/dz=−α forz≤11 km where α=6.5 K/km (Kelvin per km) and z is the height above the sea level. The temperature stays then approximately constant between 11 km and 20 km above sea level. Assume a temperature of 5 ∘C and a pressure
  55. 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
  56. 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
  57. 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
  58. 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
  59. 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
  60. 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
  61. 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.
  62. 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
  63. 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
  64. 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
  65. 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
  66. 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
  67. 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
  68. 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
  69. 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
  70. 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,
  71. 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
  72. 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
  73. Chemistry

    What is the oxidation state of V in VO2?
  74. chemistry

    1 atmosphere of pressure is equivalent to
  75. Chemistry

    Why B(CH3)3 cannot be Lewis Base??
  76. chemistry

    A compound is 52.17 % C, 13.04 % H and 34.78 % O. What is its empirical formula?
  77. Chemistry

    what is the density that has a mass of 77.0 g and a volume of 36 mL?
  78. Chemistry

    Define minimum assay
  79. chemistry

    What is the Na+ concentration of 2.85 M sodium sulfate?
  80. chemistry

    Volume of 0.185 mol . L-1 and 0.74 M
  81. chemistry

    what's the product of iron and sulphur
  82. Chemistry

    What is 17.4 psi converted to atm?
  83. chemistry

    a metal object has a mass of 8.37
  84. Chemistry

    what is the density that has a mass of 77.0 g and a volume of 36 mL?
  85. chemistry

    why is nh3polar but bacl2 non polar
  86. CHEMISTRY

    HOW MANY MOLES OF LITHIUM IS 2.69XE9
  87. chemistry

    examples of suspension and solution
  88. chemistry

    why is platinum more expensive than gold??
  89. Chemistry

    What are the products of Ba(NO3)2(aq)+K2CO3(aq)?
  90. Chemistry

    How do you find molar mass?
  91. chemistry

    What is the smalles t subatomic particle
  92. Chemistry

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

    2Li + Cu(NO3) > 2LiNO3 + Cu
  94. chemistry help~Please!!!

    What are the Ka and/or Kb value for 1M ZnCl2 Show work please!!!
  95. Chemistry

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

    Of what value is knowledge of density to a chemist?
  97. chemistry

    2420 multi ply by 24
  98. chemistry

    how can spectra be used in chemical analysis?
  99. Chemistry

    Describe electron delocalization.
  100. Chemistry

    1.25 x10^-5g/ 0.75 moles = Not sure what the ^ stands for