CHEMISTRY (WEBWORK)

59,293 results, page 98

  1. Chemistry

    How many grams of chromium could be deposited on a bracelet using 0.180 A of electricity for 4.65 hours
  2. Chemistry

    If four amino acids are all different, what is the number of peptides possible? A) 2 B) 4 C) 8 D) 10 E) 12 F) 24***
  3. chemistry under gas law

    convert the following. R=0.08206atm dm^3 mol^-1 k^-1 to jmol^-1 k^-1
  4. chemistry

    What's the aim of titrating potassium tetraoxomaganate(vii) with ammonium iron (ii) tetraoxosulphate (vi)
  5. Chemistry

    Crystallization process is restricted to_____________ Gas Liquids Solids Colloids
  6. chemistry

    How do I round 7,366.3275 to an exponent. My answer is 7.37 x 10 to 7th power am I right. Thanks
  7. chemistry

    when 1.00kg of copper reacts, 3.12kg of silver is recovered. what is the percentage yield?
  8. Chemistry

    Calculate the number of moles of solute in 497.2 L of 0.815 M sodium cyanide?
  9. chemistry

    What is the balanced chemical equation and ingredients for brufen when reacts with HCL in the stomach
  10. chemistry

    If 19.7g of ALL, is actually produced, what is the percentage yield? 2Al+3I2 2 All3
  11. chemistry

    Explain how 0.25molar sodium trioxocarbonate4 can be prepared for practical use the ml is 500.
  12. chemistry

    Which one of the two salts precipitated? AgNO3 + K2SO4 = Ag2SO4 + KNO3
  13. Chemistry

    Name the gas which reacts with lead acetate solution to turn black.
  14. chemistry

    2.3g hydrogen react with 29g of oxygen to form water what is the limiting reagent
  15. Chemistry

    Calculate % of lowering of vapour pressure if 36 g glucose is added in 312g of benzene
  16. Chemistry

    Does SO2 also make Ca(OH)2 milk white in colour, like CO2?
  17. Chemistry

    calculate the amount of heat required to raise temperature of 8.50g of water from 24°C to 29°C
  18. CHEMISTRY

    What pressure would be required to form a 0.045 M solution of helium (kH = 3.7 x 10-4 M/atm) at 25 °C????
  19. chemistry

    N2 • CCl4 • SiO2 • AlCl3 • CaCl2 • LiBr Which compounds are ionic and which are covalent?
  20. chemistry

    Calculate how many mg of potassium hydroxy are needed to neutralize 75mg of mefenamic acid .
  21. Chemistry

    What will be the molarity of the resultant solution obtained by mixing equal volumes of 1M and 5M ofNaOH.
  22. Physical Chemistry

    What is the mole fraction of alanine in 0.314m CH3CH(NH2)COOH(aq)?
  23. Chemistry

    What is the density of KCl at 25.00 °C if the edge length of its fcc unit cell is 628 pm?
  24. chemistry

    Calculate the PH and POH of an aqueous solution that is 25.00% of HCL by mass and density of 1.35g/no
  25. chemistry

    Calculate the PH and POH of an aqueous solution that is 25.00% of HCL by mass and density of 1.35g/ml
  26. chemistry grade 12

    If air contains 78% in water at 25degree centgrad .what is the concentration of nitrogen?
  27. Chemistry

    What would the net ionic equation be for : HBr (aq) + KOH (aq) = KBr + H2O
  28. Chemistry

    Determine the angular/ Radial nodes of n=4, l=2, and ml=-2 Does the m sub l value even matter?
  29. Chemistry

    2C2H6 + 7O2 → 4CO2 + 6H2O what equivalences can you write in terms of moles and why ?
  30. Chemistry

    Which two orbitals overlap to form the sigma bond between C and H in C2HF?
  31. chemistry

    What volume of 0.15 mom hclis required to neutralize 25ml of 0.12molar ba(oh)2 solution?
  32. Chemistry

    How many electron domains are around the central atom ina water molecule?
  33. Chemistry

    write the reaction equation for the formation of CN2H2 (s) from the elements in their standard state.
  34. Chemistry

    What happens when an electric current is passed through a solution of an ionic compound?
  35. chemistry

    When molecular oxygen (O2) is converted to water (H2O). Is O2 being oxidized or reduced.
  36. Chemistry

    HA(aq) <-> H+(aq) + A-(aq) K = 5.0 x 10 -9 The initial concentration of HA is 0.30 M What is the final equilibrium concentrations of HA, H+, A-? Show work, solve if you can
  37. Chemistry

    The Ksp of nickel(II) carbonate, NiCO3, is 1.42×10−7. Calculate the molar solubility, S, of this compound.
  38. Chemistry

    You have a 2.0 M solution of HNO3. To what volume in mL would you dilute 500.0 mL to achieve a pH of 4.00?
  39. chemistry

    using the kinetic theory what happens to the particles in oxygen as it cools down
  40. Chemistry

    Calculate the wavelength in nm of the line with n = 6 in the Pfund series of the spectrum of atomic hydrogen.
  41. chemistry

    list and state the uses of the products obtained from the destructive distillation of coal
  42. Chemistry

    What is the period 3 element whose 2+ ion is isoelectronic with neon? How can I find the solution? Thanks
  43. Chemistry

    Write a balance equation between ferous ammonium sulphate and kMNO4
  44. Chemistry

    How much carbon dioxide gas is there in a 43.9 L container at 12.0◦C and 8.78 atm? Answer in units of g.
  45. Chemistry

    Calculate the hydronium ion concentration of a 0.250M solution of ethaonic acid (Ka= 1.82 x 10^-5)
  46. Chemistry

    Afirst order reaction completed the 90%in 30minute find the time for99.9%,,,,
  47. chemistry

    what is the condensed formula for the product of the hydrogenation of 2-butene using a palladium catalyst?
  48. CHEMISTRY plz help

    In the accompanying chart are appropriate vapor pressures for benzene and toluene at various temperatures: Temp (C) mmHg Temp (C) mmHg Benzene 30 120 Toluene 30 37 40 180 40 60 50 270 50 95 60 390 60 140 70 550 70 200 80 760 80 290 90 1010 90 405 100 1340 100 560 110 760 d. ...
  49. 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 ...
  50. 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 ...
  51. chemistry

    what is the atomic number of ununhexium and the full symbol is this a transitional element that is a metal and what is its highest hydride and highest fluoride of ununhexium thanks What is known about Uuh can be found here. Look for element number 116. Go to www.webelelements....
  52. Ap Chemistry

    Posted by Jake on Sunday, September 23, 2007 at 1:08pm. My objective is to find the molar volume of a gas. Is this the correct balanced equation for magnesium ribbon reacting with hydrochloric acid to form hydrogen gas? 2Mg (s) + 2HCL (l) ----> H2 (g) + 2MgCl (aq) Also, I'm...
  53. chemistry - pick a polymer

    I need to pick a polymer for my science project. It has to be organic and preferably simple. Some that are already taken are: polyethene, polystyrene, PVC, polyacrylonitrile, DDT , nylon.. Thanks a lot it has been really hard for me to find something. I don't know if you must ...
  54. Chemistry

    Just having some trouble with this chemistry problem.. Thanks for help! Toxic carbon monoxide (CO) gas is produced when fossil fuels such as petroleum burn without enough oxygen. The CO can eventually be converted to CO2 in the atmosphere. Automobile catalytic converters are ...
  55. Chemistry

    What is the wavelenght of radiation of 1.50X1013Hz? The wave equation will find this: frequency*wavelength=speedoflight
  56. ChEMistry

    a binary compound between germanium and bromine would have a formula like: (a)
  57. Chemistry

    If you were to have a lewis dot structure, such as, C2H5OH, where is the O placed? Between a carbon and an H.
  58. chemistry

    addtional information: the diameter of the oil film on the water is 40cm^2 see my post.
  59. chemistry

    Hi, Can anyone please tell me how to convert cm3 into litres? Thanks ;) worked it out! Cheers ;)
  60. ap chemistry

    What is the concentration (in M) of hydronium ions in a solution at 25 degrees C with a pH = 4.282? i got 5.22 x 10^-5 ? right on the money.
  61. chemistry

    After your explanation I try to solve it, so would you please check my work again. Thank you! a)
  62. chemistry

    Please help me with this one. You are trying to dissolve oxygen in water. Will you be successful? Explain your answer.
  63. chemistry 2

    Which group from the periodic table contains two elements that exhibit +2 and +4 oxidation states? 1A, 2A, 3A, 4A, 5A, 6A OR 7A 4A. C, Sn, Pb That it 2A and 4A
  64. Chemistry

    Write a balanced chemical equation for the combustion of trioleylglycerol. The molecular formula is C57H110O6.
  65. Chemistry

    How many grams of calcium carbonate are consumed per 500 g of sulfur (IV) oxide? in what reaction?
  66. AP Chemistry

    Write a balanced chemical equation for the combustion of trioleylglycerol. molecular formula C57H110O6
  67. chemistry

    How many hydrogen atoms are ther in 18.00mg of water? 18.00 mg = 0.018 g. mols = g/molar mass.
  68. chemistry

    What is required to break covalent bonds in glucose? Im thinking of ATP and Enzymes but Im not sure.
  69. chemistry

    In a recrystallization of vanillin, can you purify a substance whose solubility decreases as the temperature increases?
  70. Chemistry

    What is the accepted value of the height of a molecule of oleic acid? I cannot find it to do my percent error.
  71. Science repost for help

    Sciece (chemistry) - help, Tuesday, September 25, 2007 at 4:32pm what is the particle theory
  72. Chemistry

    How many kilograms of chlorine are in 30kg of each of the following chlorofluorocarbons (CFC's)? CF2Cl2 -in kg's; CFCl3 -in kg's; C2F3Cl3 -in kg's?
  73. CHEMISTRY

    What experimental observations can support the theory that there is restricted rotation about double bonds?
  74. chemistry

    what happens when a hot empty coke can is put in a icy cold water ? what is the reaction?
  75. AP CHEMISTRY

    STATE THE HEISENBERG UNCERTAINTY PRINCIPLE AS IT RELATED TO THE DETERMINING THE POSITION AND MOMENTUM OF AN OBJECT.
  76. Chemistry - Solutions

    Do all solutes show an increase in solubility with increasing temperature? Explain.
  77. Chemistry - Solutions3

    Why do you think there is such a big difference in the solubility of different solids in water?
  78. Chemistry

    Which substance can not be decomposed by ordinary chemical means? how? 1. methane 2. mercury 3. ethanol 4. ammonia
  79. Chemistry

    How would you purify decanoic acid contaminated with biphenyl? what method and solvent.Please help me
  80. Chemistry

    What mass of sucrose, C12H22O11, is needed to make 500mL of a 0.20M solution? Help please... Thanks.
  81. analytical chemistry

    What is the pH at the equivalence point in a titration between 0.4450 F NH3 and 0.1520 F HCl?
  82. chemistry

    for this reaction: 2NO + heat <-> N2 +O2 which way would the equillibrium shift if catalyst is added?
  83. chemistry

    Which of the following subshells is correctly designated? a. 1f5 b. 3s3 c. 6f12 d. 4d11 e. 1p2
  84. chemistry

    Which of the following subshells is correctly designated? a. 1f5 b. 3s3 c. 6f12 d. 4d11 e. 1p2
  85. chemistry

    Using data from this chapter, calculate the change in energy expected for each of the following processes Rb(g) + Br(g) Rb+(g) + Br -(g)
  86. ap chemistry

    How can I calculate the exothermic lattice energy when all I am given is the compound formula LiF?
  87. Chemistry

    Which of the following molecules has polar bonds and is nonpolar? HF ICI3 NF3 SF4 BF3
  88. Chemistry

    All of the following are weak acids except HF H3PO4 H2SO4 HNO2 HC2H3O2
  89. chemistry

    what are the principles/techniques involved in double-indicator titration? especially in carbonate mixtures.
  90. Chemistry

    A solution of 100g of water contains 23 g of table salt. At what temperature will it begin to freeze?
  91. Chemistry

    What are the symbols of the family of elements that have seven electrons in their outermost energy level?
  92. Chemistry

    Hey, can you help me balance this equation? Cu2S + HNO3 --> Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!
  93. Chemistry

    I am trying to find tests physial/chemical to distinguish an aluminum and iron mixture.
  94. Chemistry

    What is the average mean of the following data set: 2, 8, 6, 4, 2, 4, 5 (round your answer to 2 decimal points)?
  95. chemistry

    which harmful gas is formed when coal and oils containing sulphur impurities are burned?
  96. Chemistry

    Number and arrangement of the electron pairs around: a. C in CCl4 b. S in H2S c. Al in AlH3 d. Ga in GaCl3
  97. Chemistry

    Number and arrangement of the electron pairs around: a. C in CCl4 b. S in H2S c. Al in AlH3 d. Ga in GaCl3
  98. Chemistry

    How would you prepare 455 g of aqueous solution that is 6.50% sodium sulfate Na2SO4 by mass?
  99. Chemistry

    Please explain the acitivty series of metals. How can i determine if one element displaces another?
  100. Chemistry

    Given the weight of phenacetin and its percentage yield...how would I calculate its melting point?
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100