CHEMISTRY (WEBWORK)

59,576 results, page 89

  1. chemistry

    show how CH4 +O2=CO2+H2O obeys the law of conservation of mass
  2. chemistry

    Find the volume of 0.120 M hydrochloric acid necessary to react completely with 1.51 g Al(OH)^3
  3. Chemistry Help!!

    when triangle s (entropy) is positive does that mean that the disorder has increased or decreased? Explain
  4. CHEMISTRY

    Assuming equal concentrations , rank these solutions by pH. RbOH(aq), NH3(aq), HF(aq) HBr(aq), Ca(OH)2(aq).
  5. Chemistry

    what will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?
  6. Chemistry

    If 4.0 g of hydrogen and 10.0 g of oxygen are mixed according to the equation 2 H2 + O2 = 2 H2O, which is the limiting reagent?
  7. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? i know you got to ignore Na because is a strong base but i don't know how to get the actual ka and kb ! pleasee help me!!!!!!!!!!!!
  8. CHEMISTRY

    What are the ka and kb reactions of NaHSO3 ? i know you got to ignore Na because is a strong base but i don't know how to get the actual ka and kb ! pleasee help me!!!!!!!!!!!!
  9. chemistry

    write the name or formula for a reagent that will dissolve PbCl2 but not Hg2Cl2 and AgCl?
  10. chemistry

    whats the oxidation number for all the elements in the following compound BaNaPO4
  11. Chemistry

    Calculate the sodium ion concentration when 50.0 mL of 2.0 M Na2CO3 is added to 100.0 mL of 3.0 M NaHCO3
  12. Chemistry

    Electron Configuration: What numerical values of l are possible for n=4. 1,3,5,7 what ae their corresponding letters. s,p,d,f Are these correct?
  13. Chemistry

    How would you test a solution containing only Co2+ and Fe3+ ions?
  14. Chemistry

    Calculate the wavelength of a photon of yellow light whose frequency is 6.3*10^5m. (meters)
  15. Chemistry

    Calculate the frequency of a photon of orange light whose wavelength is 6.2*10^5m. (meters)
  16. chemistry

    can anybody please explain nomenclature to me ? how to name? for example: Na3PO3 NH4CLO2 AuNO2
  17. Chemistry

    how many grams of hydrogen make up 3.5 moles of glucose C6H6O6? a 1.7g b 3.5g c21.0g d 101.5g
  18. Chemistry 1

    How many calories are absorbed when 150g of ice at O is changed to liquid water at 45C?
  19. chemistry

    if a sample of NO2 gas has 4.5ml. what is the cooled constant pressure from 45 to 5 degrees?
  20. chemistry

    Calculate the mass of carbon dioxide produced by burning 0.60kg of methane
  21. General chemistry

    How much energy is released by the combustion of 1.00 mol of octane, C8H18?
  22. Chemistry

    Calculate the solubility of AgCl in the following solution: 100mL of .004 M CaCl2
  23. chemistry

    which solution has the lower pH? a)0.1 M HCL or 0.1 M HC2H3O2? b)0.1 M NaOH or 0.1 M NH3? c)0.1 M Na2CO3 or 0.1 M NaCl?
  24. chemistry

    in a exothermic reaction temperature changed from 30 to 43, reasons why I got those answers
  25. Chemistry

    Is the structure for chlorous acid H O Cl O or H Cl O ? O I was thinking that both could be correct but I am not 100% sure.
  26. Chemistry

    Is the structure for chlorous acid H O Cl O or H Cl O ? O I was thinking that both could be correct but I am not 100% sure.
  27. Chemistry

    How do valence electrons play a part in the physical or chemical charactersitics of an element?
  28. Chemistry

    how many grams of solid iodine are produced by the decompostion of 2.1 g of hydrogen iodide gas?
  29. Chemistry

    Hoe much carbon dioxide is produced from 2.0 L of propane combusting at STP?
  30. Chemistry

    What happens to the current flow with time in an electrolytic cell ? explain. thank for helping~
  31. Chemistry

    What is the trend in atomic size in the series of Group IIA elements Be through Ra?
  32. Chemistry

    Is this true or false Both sublimation and melting are considered endothermic processes.
  33. chemistry

    what must be done with the radioactive waste materials that result from splitting atoms and how is this a problem?
  34. Chemistry

    What is the strongest intermolecular force in a sample of butanoic acid, and why? H H H O . . . .. H .C .C. C .C .O.H . . . H H H Is this structure right?
  35. Chemistry

    What is the minimum volume of 6.5M HCl required to completely dissolve 24.0g of magnesium metal?
  36. chemistry

    what mass of SO2 is formed upon the complete combustion of 1.59g of methanethiol
  37. Chemistry

    Is it appropriate to call a soft drink an aqueous solution? Justify your answer
  38. Chemistry

    Write the balance equation and the reaction type when magnesium is added to HCl
  39. chemistry

    How many moles of ammonium chloride could be found in 100g of water at 70 degrees celsius?
  40. chemistry

    if 4.4 moles of copper metal was deposited from a solution of Cu(NO3)2, how many electrons were involved?
  41. chemistry

    if you combine 2 compounds together will you make a mixture? Such as salt and water.
  42. chemistry

    What is the molecular geometry for SH2? 1. Bent 2. Trigonal planar 3. Tetrahedral 4. Liner
  43. chemistry

    balanced equation: HC2H3O2 + NaOH -> What is the mole ratio of these two substances?
  44. AP Chemistry

    The solubility of solid Ce(IO3)3 in a 0.20 M KIO3 solution is 4.4 10-8 mol/L. Calculate Ksp.
  45. 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
  46. chemistry

    Molarity is defined as the number of moles of solute divided by the volume of the solvent
  47. Chemistry

    The half life for a first order reaction is know to be 4.5 h. How long will it take for 85% to be decomposed, in h?
  48. Chemistry

    The density of an elemental gas is 1.7824 g/L at STP. What is the molar mass of the element?
  49. chemistry II

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

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

    what element is undergoing oxidation in the following reaction Zn(s)+AgNO3(aq) Zn(NO3)2(aq)+2Ag(s)
  52. 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 ?
  53. Chemistry

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

    If I measure my big screen TV and get 500.24 centimeters, which numeral is estimated? How many millimeters is it?
  55. college chemistry

    What volume would 10.5 g of nitrogen gas, N2 occupy at 200.K and 2.02 atm.
  56. college chemistry

    What volume would 10.5 g of nitrogen gas, N2 occupy at 200.K and 2.02 atm.
  57. college chemistry

    What volume would 10.5 g of nitrogen gas, N2 occupy at 200.K and 2.02 atm.
  58. Chemistry

    If the density of the vapor at 90°C and 759 mmHg is 1.455 g/L, what is the molecular mass of the compound?
  59. chemistry

    3.429 X2 (SO4)3 contains 0.12 mol of oxygn tom.what is the atomic wight of x?
  60. chemistry

    I need help building a 3d model of the apertame molecule Can you give me the correct angles? Thanks
  61. chemistry

    Balance this net ionic equation Mn04-+zn(s)»zn(oH)2 +Mn02(s) in a basic medium
  62. chemistry

    Which of the two aqueous solutions has a higher boiling point 0.35mCaCl2 or 0.9m urea?
  63. Chemistry

    Two characterstics that lead to an element being classified as a metal. Please help!
  64. Chemistry

    Two characterstics that lead to an element being classified as a metal. Please help!
  65. chemistry

    What are the the missing reactants for the double-displacement reaction that produces PF5 and AsCl3 ?
  66. chemistry

    what mass of sodium chloride can dissolve in 14.8g water at 100 degrees Celsius?
  67. chemistry

    What are the materials used to create a free standing atomic model of iodine?
  68. Chemistry/Stoichiometry

    How many liters of H2 are needed to produce 2.00g of NH3? N2+3N2 ---> 2NH3
  69. Chemistry

    Find the product and list the full balanced equation. CuCl2 + AgNO3 -> ?
  70. chemistry

    the order of cation concentration of CuSO4, BaSO4, CaSO4 from highest to lowest.
  71. chemistry

    calculate the energy required to heat 1.00L of ice at -50.0C to steam at 180.0C
  72. chemistry

    What is the name and chemical balance equation for magnesium metal and nitric acid?
  73. chemistry

    i would like to know ten examples of indicators with their pH range and colours. thanks much
  74. chemistry

    If 22.40g of potassium react with silver sulfide what mass of each product will form?
  75. General Chemistry

    Can a Van Der Waal force change the shape of a molecule?
  76. College Chemistry

    Do odd electrons make a weak or strong repulsion axis?
  77. chemistry

    how much ice would i have to eat to l lose 10% of my body weight?
  78. chemistry

    Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
  79. chemistry

    Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
  80. Chemistry

    What is the empirical formula for a compound which contains 67.1 percent zinc and the rest is oxygen
  81. Chemistry

    What is the correct net equation for: LiOH(aq) + HClO(aq) → LiClO(aq) + H2O(l)?
  82. Chemistry

    What is the balanced equation for the reaction between sodium tetraborate and sulfuric acid?
  83. chemistry

    Can someone answer please Determine the boiling point of water at 698.5 mm Hg?
  84. chemistry

    From what acid and what base are the following salts made: KBr, NH4NO3, and BaCl2?
  85. chemistry

    the amount of heat when 65g of water at 100c until it cools to 37c
  86. chemistry

    will KCl conduct more electricity than AlCl3 because K has less ionization energy than Al?
  87. chemistry

    write a balanced chemical reaction representing the combustion of hexane? C6H14
  88. Chemistry

    On the basis of MOT, explain why the stability of N2 decreases on ionization but the inverse is true for O2.
  89. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?
  90. chemistry

    If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?
  91. Chemistry

    A sample of 50.0 mL if sulfuric acid that has a density of 1.84 g/mL would have a mass of how many grams?
  92. chemistry

    if we combust 4.23 x 10^24 molecules of propane how many grams of carbon dioxide and water you will produce ?
  93. chemistry

    What mass of carbon dioxide is produced from the complete combustion of 2.50×10−3 of methane?
  94. Chemistry

    How much water, in grams, can be made from 3.59 × 10^24 hydrogen molecules? Answer in units of g
  95. chemistry

    how many seconds would it take to go from 0mi/h to 60 mi/h with an average acceleration of 15mi/h squared
  96. Chemistry

    If water is synthesized how much hydrogen would be needed to make 10.0 grams?
  97. Chemistry

    At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)
  98. Chemistry

    A student mixes 45.0 ml of .150 M HCL with 30.0 ml of .200 M NaOH. What is the pH of the resulting solution?
  99. Chemistry

    How much 0.5 M HCl is needed to neutralize 5.5 kg of ammonia dissolved in 6 gal of water?
  100. chemistry

    Convert .25 L of a .025 M solution of NaCL starting with solid NaCI and water
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