chemistry! URGENT

61,409 results, page 97

  1. chemistry

    A catalytic converter combines 2.55 g CO with excess O2. What mass of CO2 forms?
  2. chemistry

    what is the temperature (degree celcius) of 1.75g of o2 gas occupying 4.6l at 1.00 atm?
  3. chemistry

    2.06 X 10^25 formula units of aluminum sulfate would have what mass?
  4. chemistry

    To raise the temperature of 200.8 g of water from 50.00 °C to 60.00 °C requires how much heat?
  5. Chemistry

    What is the significance of the distance between two metals in the activity series?
  6. chemistry PLEASE HELP

    How many milligrams of sodium azide will produce 8.35 Liters of N2 at STP???
  7. chemistry

    What volume of oxygen is consumed when 9g of water is formed when butane is burnt?
  8. chemistry

    What mass of F2 is needed to produce 116 g of PF3 if the reaction has a 77.4% yield?
  9. chemistry

    how do you convert .99grams of copper to moles using the atomiuc weight
  10. Chemistry

    What is the oxidation state of Cr in each of the following compounds? (a) CrO (b) CrO3 (c) Cr2 O3
  11. chemistry

    does Adding A increased Q, so the net reaction proceeds to the left to decrease Q. a+b=ab
  12. Chemistry

    How many grams of NH3 can be produced if 105g of NH4OH are completey decomposed?
  13. chemistry

    0.315 M 2(NH4)SO4 and 0.488 M NH3 Calculate concentration of OH
  14. chemistry

    how many grams of KClO3 will dissolve in 1 liter of water at 50 degree celisus ?
  15. chemistry

    Calculate whether or not a precipitate will form if 1.40 mL of 0.62 M NH3 are added to 4.4 L of 1.0 10-3 M FeSO4.
  16. Chemistry

    How do you write a chemical equation for NH4NO3? Is it... NH3 + H2O= NH4 + OH
  17. Chemistry

    How many grams of H2SO4 are needed to make a 4.50 m solution in 300 g H2O?
  18. chemistry

    How many Liters of a 5.00 M Zn(NO3)2 would be needed to react with 200 g of (NH4)2S?
  19. Chemistry

    How many milliliters of 6.50 M HCl(aq) are required to react with 5.95 g of an ore containing 35.0% Zn(s) by mass?
  20. chemistry

    What fraction of piperazine (perhydro-1,4-diazine) is in each of its three forms (H2A, HA–, A2–) at pH 8.98?
  21. Chemistry

    What do we mean when we say that concentrated nitric acid (HNO3) is 16 molar?
  22. Chemistry

    calculate the volume of 0.50 M NaOH needed to saturate 100.0 ml of 0.50 M Zn(NO3)2 with Zn(OH)2
  23. Chemistry

    calculate the volume of 0.50 M NaOH needed to saturate 100.0 ml of 0.50 M Zn(NO3)2 with Zn(OH)2
  24. Chemistry

    Calculate the volume of 0.3MHCL used to neutralise NaOH solution
  25. organic chemistry

    what type of feature will be observd in the ei mass spectrum of chlorobenzene?
  26. chemistry

    why spectrophotometric bioassay indirectly determine the concentration of glucose in solution
  27. chemistry

    Calculate the solubility of Mn(OH)2 in grams per liter when buffered at each of the following. (a) pH 7.7 (b) pH 9.6 (c) pH 11.3
  28. Chemistry

    Why can't NH_3_ donate a proton and act as a Bronsted-Lowry acid?
  29. Chemistry

    How many milliliters of 0.291 M HCl would be required to titrate 6.83 g KOH?
  30. chemistry

    What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?
  31. Chemistry

    What are ways in which pka values for weak acids can be experimentally determined?
  32. Chemistry

    Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.
  33. Chemistry

    Calculate the mass of water that will be produced when 5.0 grams of H2 is reacted with excess O2.
  34. Chemistry

    What is the effect of aqeour ammonia on (NH4)2SO4.FeSO4.6H2O?
  35. Chemistry

    How much 1.0 M NaOH would be required to completely neutralize 40.0 mL of 0.60 M HCl?
  36. Chemistry

    the pressure in a 10.0 L cylinder is raised from 483 mm Hg to 762 mm Hg. What is the new volume?
  37. Chemistry

    How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?
  38. Chemistry

    Which is the strongest acid, CCl3COOH or CH2ClCOOH please explain WHY it is stronger.
  39. Chemistry

    I'm not really sure how to go about doing this problem... What is the pH of a 7.40 x 10-3 M solution of NH4Cl? Help is appreciated! Thank you
  40. Chemistry

    In a zinc-copper cell, Zn | Zn+2(1M) || Cu+2(1M) | Cu, which electrode is negative? a. Cu(s) b. Zn(s) c. Zn+2(aq) d. Cu+2(aq) Its A or C. Not sure. Please help.
  41. Chemistry

    If the temperature of 150.0g of water increased from 23.3C to 44.8C, how much heat was absorbed
  42. General Chemistry II

    Why is the Ksp value larger for NaNO3 and KNO3 than water?
  43. chemistry

    a salt shaker filled with 17.0g sodium chloride contain how many moles?
  44. 10th grade chemistry

    How many grams of kno3 can be dissolved in 100g of h2o at 50°c
  45. chemistry

    how many atoms are present in a sample of water molecules with a mass of 1.800g
  46. Chemistry

    If the pressure is 10.0 atm, what is the temperature? If a 2.53-L container is filled with 169 g argon
  47. chemistry

    how does an increase in pressure affect the following reaction? C2H2(g)+H2(g) C2H4(g)
  48. chemistry

    effect of Bacl2 and HNO3 of (NH4)2so4.feso4.6ho2
  49. Chemistry

    What are the healthcare applications of biochemical, pharmaceutical and diagnostic chemical reactions?
  50. chemistry

    What is the charge carried by electrons as 0.120 mole of Cr(s) is oxidized to Cr3+(aq)?
  51. chemistry

    what is the word and balanced chemical equation for oxalic acid and marble?
  52. chemistry

    calculate the yield of CO2 if 30.g of C2H6 reacts with 14.0g of O2. Show work
  53. Chemistry

    Calculate the [H+] for: black coffee with a pH of 6.9 (Enter your answer as follows: 1.0E-2 for 0.010)
  54. chemistry

    How many mL of 0.100M HCl are needed to neutralize 49.0mL of 0.104M Ba(OH)2 solution?
  55. Chemistry

    What are the Six possible ratios for the equation for the formation of potassium chloride?
  56. Chemistry

    What are the Six possible ratios for the equation for the formation of potassium chloride?
  57. chemistry

    What is the final temperature of 1370 g of water, originally at 20.9°C, if it absorbs 47.6 kJ of heat?
  58. Organic Chemistry

    How do I make an IR Spectrum of C6H12S2 (Allyl Propyl Disulfide)
  59. chemistry

    the amount of K2Cr2O7 required to prepare 100ml of its 0.05N solution
  60. chemistry

    C3H8(g)+5O2(g)-->3CO2(g)+4H2O(l) what reactant is oxidized and which is reduced?
  61. chemistry

    What is the minimum volume of 10.0 M H2SO4 necessary to react completely with 16.2g of Na2CrO4?
  62. chemistry

    how many grams of carbon dioxide can be produced when 15.g of oxygen is reacted with 25.g of c2h2
  63. chemistry

    Balance the following redox reaction. MnO4 (aq) + Fe (s) --> Mn2+ (aq) +Fe2+ (aq)
  64. chemistry - thank you:)

    What volume of H2SO4 0.04 M is required to completely neutralize 200 mL of Al(OH)3 0.02M?
  65. Chemistry

    What is the concentration of NO− 3 after mixing? Answer in units of mol/L
  66. Chemistry Help Please

    The concentration of hydroxide ions in a solution of nitric acid 0.2 M is: a. 2 x 10-14 M b. 5 x 10-14 M c. 5 x 10-7 M d. 2 x 10-1 M IS IT D)?
  67. Chemistry

    Calculate the osmotic pressure at 22 °C of a 0.25 M solution of a) dextrose, b) magnesium chloride.
  68. chemistry

    diffusion helps detecting leakages in cylinders or gas stoves
  69. Chemistry

    Assume you are starting with a 10x solution. how would you make it a 7.5x dilution?
  70. Chemistry

    What is the mole fraction and mass percent of NaCl when the molality is 1.71m?
  71. chemistry

    try comparing the e values with of silver and i think you will see a reason why..
  72. Chemistry

    What is the volume of a sample of helium that has a mass of 5.13x10^-3 and a density of 0.17847g/L
  73. chemistry

    you will be presented with three crystallographic direction drawn in a unit cell.
  74. Chemistry

    What are the oxidation numbers for sulfur in the half reaction SO2 --> H2SO4 ?
  75. chemistry

    If 7.50 mL of 0.100M HCl is mixed with 12.5mL of NaOH. What is the concentration of the base
  76. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid
  77. chemistry

    If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid
  78. chemistry

    I need the half reactions for this redox reaction: 2KClO3-----> 2KCl + 3 O2
  79. chemistry

    36.5g of hcl are dissolved in 180g of h2o. what is the mole fraction of the solute
  80. Chemistry

    636 grams of Na2CO3(s) are disolved in 3.0 liters of aqueous solution
  81. chemistry

    What causes a tip that allows us to see the precessional period in NMR?
  82. Chemistry

    How many milliliters of 2.00 M HCl(aq) are required to react with 7.55 g of an ore containing 36.0% Zn(s) by mass?
  83. chemistry

    what is the wavelength of the radiation absorbed when an electron move from n=2 to n=5 for a helium +1 ion?
  84. chemistry

    calculate the de broglie wavelength of He atom at 27 degree celsius & v=2.4*1000
  85. Chemistry

    Calculate the equilibrium constant, k a reaction with delta G= -32.5 kj/mol at 25 degrees C
  86. Chemistry

    What mass of AgI can be produced from a 0.512g sample that assays 20.1% ALI3?
  87. Chemistry

    need help to balance half reaction in basic solution IO3 to I2
  88. Chemistry

    Help? How many moles of LiF would be required to produce a 2.5 M solution with a volume of 10.5 L?
  89. chemistry

    what is the concentration of a 250 ml solution that contains 44 grams of magnesium fluoride
  90. chemistry

    how many grams of oxygen are required to burn completely 570g of octane?
  91. chemistry

    Dissolve 0.590/(mol)of citric,C-6-8H-O7),in 135(1Kg)of water.
  92. chemistry

    Dissolve 0.590/(mol)of citric,C-6-8H-O7),in 135(1Kg)of water.
  93. chemistry

    Dissolve 0.590/(mol)of citric,C-6-8H-O7),in 135(1Kg)of water.
  94. Chemistry

    What is the density of 3.40 Liters of Hydrochloric acid (HCl) that has a mass of 24.5 grams?
  95. chemistry

    The subject is stoichiometry. How many moles of NH3 can be produced from 12.0mol of H2 and excess N2?
  96. chemistry

    What mass of nitric acid, in grams, can be made from 113g g of ammonia?
  97. chemistry

    the density aniline c6h5nh2 is 1.02g/mL how many molecules are present in 1.00Lsample
  98. chemistry

    CAN NaOH(aq)+Co2 yield NaHCO3 PLEASE ANSWER DEEPLY!!!!!!!!!!!!!!!
  99. Chemistry

    What are the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight?
  100. Chemistry

    How many atoms of hydrogen are in a mixture of 3.49x10^23 molecules of H2O and 78.1g of CH3OH?
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