CHEMISTRY (WEBWORK)

59,669 results, page 88

  1. chemistry

    what is an ionic compound that forms an acid-base neutralization reaction?
  2. Chemistry

    The formula for magnesium carbonate is MgCO3. What is the charge of the cation in Ag2CO3? Would it be +1 or +2 because there are two of Ag?
  3. Chemistry

    If you want to prepare 2.0 liters of a .25 M solution of NH4Cl, how many grams of the salt should you weigh out?
  4. chemistry

    If Tums is added to 55.0 {\rm mL} of 0.750 {\rm M}{\rm HCl}, how many grams of {\rm CO}_{2} gas are produced?
  5. chemistry

    what is the molarity of the solution comtaining 2.5g of acetic acid in 75g of benzene
  6. Chemistry

    The color of light emitted by a hot solid object depends on?
  7. Chemistry

    Does a catalyst affect a reversible equation like the kind in my earlier post?
  8. chemistry

    Which reaction illustrates water acting as a Bronsted Lowry base?
  9. chemistry

    cal culate the ph of a mixture of 100 ml distilled water and 2 ml of 2M of NaOH
  10. Chemistry

    How do you find the mass of iron in audio tapes per metre of tape?
  11. chemistry

    Explain how you would convert from number of atoms of a specific element to its mass??
  12. Chemistry

    I have [CoCl4}2 /{Co(h2O)6}2+and add AgNo3 what does silvirnitrate does and how is that consit with Chatelier
  13. Chemistry

    What is the molecular mass of a substance X if 1.00 L of a solution containing 4, 5 g of X has an osmolality of 0.337 mmHg the 30° C?
  14. chemistry

    how many joules of heat are used in raising temp of 25 g of water from 20 to 35 degrees celcius
  15. chemistry

    double indicator titration of phosphoric acid with sodium hydroxide
  16. chemistry

    Air is a gas solution where oxygen is the solvent. True or False
  17. chemistry

    A mixture of 94.6g of O2 and 82.2g of Ne is placed in a 200.0L container at 250K . What is the partial pressure of O2 in atmospheres?
  18. Chemistry

    What is the ppm of 4.50mg of ddt in 10kg of seal fat Please show how
  19. Chemistry

    If it takes 45 days for 80.0 mg of a particular radioactive isotope to decay to 10.0 mg what is its half-life?
  20. chemistry

    How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
  21. chemistry

    How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
  22. Chemistry

    If it takes 45 days for 80.0 mg of a particular radioactive isotope to decay to 10.0 mg what is its half-life?
  23. Chemistry

    What is the yield of the synthesis of ammonia to 400° C and 500 atm of pressure?
  24. Chemistry

    What is the concentration of a solution which contains 1 mole of CaCl2 dissolved in 2000mL of solutions?
  25. chemistry

    When 71.43 mL of 0.855 M HNO3 is diluted with 20.57 mL of water, the molarity of the nitric acid becomes
  26. chemistry

    A Bronsted-Lowry acid is a proton donor. True or False
  27. chemistry

    What is the maximum amount (in grams) of CO2 that can be obtained from 454g of Fe2O3?
  28. chemistry

    how many moles are in a 65L sample of chlorine gas at 10degrees Celcius?
  29. chemistry help me please

    What values does STP have for pressure in the units of kPa and atm and mmHg?
  30. Chemistry

    Calculate the boiling temperature of a 0.50 M solution of sucrose. Assume that the concentration is 0.50 m.
  31. Chemistry

    Calculate the energy (kJ) required to raise the temperature of 22g of water from 12 C to 90 C.
  32. chemistry

    what element is undergoing oxidation in the following reaction Zn(s)+AgNO3(aq) Zn(NO3)2(aq)+2Ag(s)
  33. chemistry

    what element is undergoing oxidation in the following reaction Zn(s)+AgNO3(aq) Zn(NO3)2(aq)+2Ag(s)
  34. Chemistry

    The molar solubility of a generic substance, Mg(OH)2 ksp = (1.2x10^-11) in 0.10 M NH3 Kb = 1.8 x 10^-5 help me please =)
  35. chemistry

    please, what is another name for double indicator titration and if the indicators are reversed is there any change in the result.
  36. Chemistry

    What mass of pure silver would you obtain from 85.0 g of AgNO3? My work The answer i got is 53.55 g Am i right?
  37. Chemistry

    How much heat energy, in kilojoules, is required to convert 53.0 g of ice at -18.C to water at 25.0 C ?
  38. chemistry

    Draw the three alkenes, each of formula C5H10, that will form 2-methylbutane upon hydrogenation.
  39. Chemistry

    Use VSEPR theory to predict the bond angles of sulfur hexafluoride.
  40. chemistry

    0.717g of potassium dihydrogen phosphate in 500ml concentration in ppm
  41. chemistry

    How aluminium is extracted from its BAUXITE ORE which contains Fe203 and Sio2 as impurities?
  42. Chemistry

    How many grams of oxygen gas must react to give 2.80g of ZnO?
  43. chemistry

    According to the IUPAC system what is the following compound: CH=C-CH-CH-CH3 (It is not an equal sign but has three dashes up and down instead of two)
  44. chemistry

    calculate the heat liberated when 118g of water at 0 degrees C is frozen?
  45. Chemistry

    3)How many grams of sodium chloride do you need to weigh out to prepare 1.4L of 0.9% NaCL solution?
  46. chemistry

    What mass of AuCl3 contains 160.9 g of gold? My work i got 104.6 g is that correct
  47. chemistry

    how many atoms of oxygen are contained in 0.662 mol of magnesium carbonate?
  48. Chemistry

    What is the volume in liters occupied by 37.7 moles of CO2 at 9.54 atm and 55 degrees?
  49. Chemistry

    What is the pressure in a 22.1-L cylinder filled with 16.3g of oxygen gas at a temperature of 329K?
  50. chemistry

    0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it
  51. chemistry II

    how do I calculate how many moles of solute particles are in one mole of naphthalene, C10H8?
  52. Chemistry

    can you look at the additional attached questions from me this morning at 2:29am? not fully understanding them. thanks for your help
  53. Chemistry

    The solutions of both Ag+ and Zn2+ ions have no color. What does this suggest about their electron configurations?
  54. chemistry

    How many grams of ammonia can dissolve in 100g of water at 22 degrees celsius?
  55. chemistry

    Net Ionic Reaction and molecular Equations of Ca3(PO4)2
  56. Chemistry

    How much NACl do i need to dissolve in grams to make 0.9%solution of 0.25l saline
  57. chemistry

    if I have 3 tablespoons of sugar (15 grams) and dissolve it in 1 cup (~237 mL) and take out 30 mL what is the molarity in the 30 mL?
  58. chemistry

    Calculate the pH of the following aqueous solution: 1.00 mol/L sulfuric acid, H2SO4(aq)
  59. Chemistry

    When NiCl2.6H2O dissolves in water, what does it form (i.e. balanced equation)?
  60. chemistry

    What is the minimum volume of 2.6 required to completely dissolve 20.0 of potassium metal?
  61. chemistry

    if I have 3 tablespoons of sugar (15 grams) and dissolve it in 1 cup (~237 mL) and take out 30 mL what is the molarity in the 30 mL?
  62. chemistry

    What mass in grams of potassium hydroxide is cntained in 500 mL of solution that has a pH of 11.5?
  63. Chemistry

    Describe how you would make a 125 mL of 0.025 M solution of potassium dichromate?
  64. chemistry

    what are the products of the following reaction. CH3COOH+CH3CH2OH---> (there is an H+ above the dotted arrow line)
  65. Chemistry

    Why is it hard to use the periodic table to predict the oxidation #'s of the transition elements?
  66. chemistry

    What is the oxidation number of chlorine in Al(ClO4)3? I don't understand this question, can someone help? Thank you!
  67. chemistry

    explain briefly why CuSo4 is more soluble in water than in organic solvent
  68. chemistry

    calculate the solubility of PbI2 in 0.0123M CaI2. Ksp=6.81x10^-9
  69. Chemistry

    Determine the specific mass of fluorine (F2) in g/cm³ in 20°C and 188 torr
  70. Chemistry

    How do I make a 500ml amount of a 0.3% aqueous solution of chlorine dioxide
  71. CHEMISTRY

    What is the effect of plus two degree celcius miscalibrated themometer on the enthalpy of neutralization?
  72. chemistry

    What mass of sodium iodide (NaI) is contained in 135 mL of a 7.0% (m/v) soulution?
  73. Chemistry

    2HCl+Pb(NO3)2---> PbCl2 (s)+2HNO3 Can you please tell why this is not an acid base reaction?
  74. chemistry

    write a chemical reaction for lead2 nitrate + sodium iodide ->
  75. Chemistry

    . Okay 2HgO turns into 2hg + O2. What mass of Co2 can be produced from 25.0g of Fe3O4 ?
  76. Chemistry

    What is product form when 2-bromobutane reacts with potassium cyanide in ethanol?
  77. chemistry

    How many moles of O2 are needed to combine with 0.288 mol Al to give Al2O3?
  78. Chemistry

    What does it mean to have a minimun formal charge in dealing with Lewis Dot Structures?
  79. Chemistry

    Write the full electron configuration for the ground state of each of the following: a. Ni b. Ni2+ I'm not exactly sure what to do here, please help!
  80. Chemistry

    'calculate the mass in amu of 2.879 1023 xenon atoms'
  81. chemistry

    Explain why Na2CO3 (stop solution) inhibits -galactosidase activity.
  82. chemistry

    Highlights the basic points in lewis and langmuir theory of electrovalency.
  83. Chemistry

    When 25.0g of Zn reacts, how many L of H2 gas are formed at 298K abd a oressure of 854mmHg?
  84. chemistry

    sodium hydroxide and carbonic acid net ionic equation
  85. Chemistry

    Do you have a site where I can have notes on Nuclear Magnetic Resonance(NMR) Spectroscopy. Thank you What do you want to know?
  86. chemistry

    potassium hydroxide and perchloric acid net ionic question
  87. Chemistry 1010

    Describe exactly how you would make 150.0g of a 4.00% (w/w) solution of NaBr in water ?
  88. chemistry

    How many moles of dextrose (C6H12O6) are in 264mL of solution with a concentratino of 0.78M?
  89. chemistry

    how many grams of solute are in 250ml of 0.500M glycerin . (C3H8O3=92.1 amu)?
  90. chemistry

    Naturally occurring reactions of oxygen (O2) are always desirable. True or False
  91. Chemistry

    How many milliliters of 3.0 M NaOH are required to react with 0.50g of Cu2+ to form Cu(OH)2?
  92. Chemistry

    What is the difference between an Arrhenius acid/base, a Brønstead Lowry a/b and a Lewis a/b?
  93. Chemistry

    Suppose a solution contains 0.21 M Pb2 and 0.41 M Al3 . Calculate the pH range that would allow Al(OH)3 to precipitate but not Pb(OH)2.
  94. chemistry

    What is the value of A in the following nuclear reaction? 212/84Po→208/82Pb+A/ZX
  95. chemistry

    What are the oxidizing agents for Formic acid and Ferrous ammonium sulphate?
  96. Chemistry

    Calculate the maximum concentrations of Pb+ that can exist in 3.0 x 10(-2)M Na2SO4 without forming a precipitate.
  97. Chemistry

    Plz help me balance this chemical eqn H2C2O4.2H2O+KMnO4 ---->
  98. chemistry

    When an acid and a base react in a neutralization reaction, the products will be acidic. T/F
  99. chemistry

    balanced equation: HC2H3O2 + NaOH -> What is the mole ratio of these two substances?
  100. chemistry..

    to drbob222 ok, the pka (hclo) = 7.54 the ph = 7.35 this problem was under "preparing a buffer" section
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