CHEMISTRY (WEBWORK)

59,293 results, page 96

  1. Chemistry

    lead(II)nitrate reacts with oxygen gas to produce diphosphorous pentoxide
  2. chemistry

    how many rb atoms could be placed on a square surface that is 1.0cm on a side? The diameter of a rb atom is 4.95
  3. Chemistry

    Calculate the amount of heat (calories) needed to raise the temp of 10.0g of water from 10.0 c to 75.0 c ??
  4. Chemistry

    I'm having trouble understanding hybrid atomic orbitals. Could you please explain? Thanks
  5. chemistry

    What is the mass of mercury that can be prepared from 2.00 g of cobalt metal? Co(s)+HgCl2(aq)→CoCl3(aq)+Hg(l)
  6. Chemistry

    Name the organic product of the following nucleophilic substitution reaction OH-+CH3I
  7. Chemistry

    an object with a mass of 24g and a volume of 32ml is most likely what substance
  8. Chemistry pls help

    Ion flame test Why is it important to not let the wooden splint burn ??
  9. Chemistry

    how many grams of baking soda is needed to neutralize 500ml of hydrochloric acid ?
  10. analytical chemistry

    How many grams of Ca(OH)2 can be dissolved in 550mL of a .0500 M NaOH solution. Ksp - Ca(OH)2 is 5.5 x 10-5
  11. Chemistry

    HOW MANY MOLES OF solute are present in each of the following 50.0mL OF1.20M HNO3
  12. Chemistry

    Solve with half equation reaction SO3 2- + MnO4 -=SO4 2- + Mn2+
  13. Chemistry

    Calculate how much charcoal(carbon) is needed to reduce 40kg of Fe2O3
  14. Organic Chemistry 2

    What is the purpose of adding NaOH ot the reaction? This is the from our Benzil Lab.
  15. Organic Chemistry 2

    What is the purpose of adding NaOH ot the reaction? This is the from our Benzil Lab.
  16. chemistry

    Calculate ΔGo (in J) for 2 moles of electron(s) in each half-reaction and a standard potential of 0.44 V
  17. Chemistry

    How do I find the number of moles of NaOH when given 2M and 50.0mL? Also with HCl?
  18. Chemistry

    Why are the two words "alkaline" and "earth" used to name the group 2 metals?
  19. chemistry

    Calculate the volume occupied by 7g of nitrogen gas at 27 degree c and 750 mm of hg pressure
  20. Chemistry

    What is the minimum volume of 2.6 M HBr required to completely dissolve 35.0 g of potassium metal?
  21. Chemistry

    How do I know the order of placing dots on the lewis structure? Please give an example.
  22. chemistry

    Which is the correct expression for Keq when the chemical reaction is as follows: N2 + 3H2 2NH3.
  23. chemistry

    How many milliliters of water has been dispensed if the initial buret reading was 0.45 mL and the final is 20.33 mL?
  24. chemistry

    41. Ethyne, C2H2, used in welding react with oxygen as shown below.
  25. Chemistry

    What is the net ionic equation of potassium carbonate combines with strontium hydroxide?
  26. Chemistry

    What is the net ionic equation of potassium carbonate combines with strontium hydroxide?
  27. chemistry

    how many liters of ammonia at STP are required to produce 4.65 grams of hydrogen fluoride?
  28. Chemistry

    7. Suppose 45.0 mL of 0.250 M HNO3 was mixed with 35.0 mL 0.600 M Ba(OH)2. Calculate the pH of the final solution.
  29. Chemistry

    What is the pressure of 1.78 g of nitrogen gas confined to a volume of .118 L and 25 degrees Celsius?
  30. Chemistry

    How many molecules of silicon triiodide are present given 450.0 grams of the compound?
  31. chemistry

    make 100ml of 0.50mol/L CuSO4 by diluting part of the 0.100 mol/L
  32. Honors Chemistry

    Predict Products and write balanced equation FeBr3 + 3Ba(0H)2
  33. chemistry

    what is the molar solubility of Fe(OH)3 in a buffered solution with pH=8.2 at 25 degrees Celsius given ksp =4.0*10^-38.
  34. chemistry

    how many joules are needed to completely melt 25 grams of ice at 0 degree celcius?
  35. Chemistry

    Compute the surface area of revolution about the x-axis over the interval. y = x^2, [0, 4] Is it (pi/12)(65^2 - 65)^(3/2)?
  36. CHEMISTRY

    what is the percent by mass of solution (d =1,3g/ml) of urea ((NH2)2CO) with molarity 8,4mol/l?
  37. Chemistry

    How do you separate a mixture of iron fillings and sulphur powder by use of methylbenzene
  38. Chemistry

    1.10 g of glucose was completely burnt in a copper calorimeter. The temperature of the water increased from 25.85 °C to 36.50 °C.
  39. chemistry

    state what happens when chlorine is bubbled through Iron(II) sulphate solution .
  40. chemistry

    I am wondering why H2S has only London Dispersion forces and not Hydrogen Bonding?
  41. Chemistry

    In what part of the electromagnetic spectrum would transition lines of n = 7 be expected to be found?
  42. chemistry

    in todays experiment what length of magnesium ribbon would be required to generate 42.00 ml's of H2?
  43. Chemistry

    Which one between N2O4 and NO2 is more susceptible to decompose immediately? And why?
  44. Chemistry

    Are the atoms in stearic acid and ammonia held together by covalent bonding?
  45. science (chemistry)

    How does salt affect the boiling point of water? (in simple words)
  46. chemistry

    How much water could you make? blanced equation : 4 C7H5N3O6 + 5 O2 = 6 N2 + 12 CO2 + 10 H2O + 16 C.
  47. Chemistry

    which element in the first transition series do not exhibit variation of oxidation state and why?
  48. chemistry

    For the reaction N2(g) + 3H2(g) 2NH3(g), what will happen if more ammonia gas is added?
  49. Chemistry

    Explain in words what is happening in the reaction between copper and silver nitrate.
  50. English academy.chemistry

    Complete the following reaction 2F2(g) +2H2O(ĺ)=?
  51. chemistry

    How the volume of the individual gas particles compared to the distance between each particle?
  52. Chemistry

    How many grams of ammonia NH3 are necessary to react with 1.2X10^24 molecules of oxygen?
  53. Chemistry

    Can you determine the limiting reactant just by comparing the masses of the reactants in a reaction?
  54. chemistry

    What is the bond of a salt molecule? A. covalent B. hydrogen C. disulfide D. ionic I think A
  55. chemistry

    based on your calculated rf values which cations formed weakly charged complexes
  56. chemistry!

    what observations are made when you bubble chlorine into a solution of potassium iodide?
  57. chemistry

    If you begin with 0.030 L of a 2.5M NaOH solution, what concentration will you end up with if you dilute it to 0.050?
  58. Chemistry

    Are any of these molecules aromatic? If so, why? 1. C5PH5 2. [C4N2H5]- 3. [C4B2H]2- 4. [P5]- 5. [C7H7]+ 6. [C4NH5]- 7. [C8H8]2-
  59. Chemistry

    Calculate the mass in grams present in 0.95 mole of sodium hydrogen trioxocarbonate(iv)
  60. chemistry

    what mass of CdS is produced if 4.55g of cadmium reacts with 2.00g of sulfur?
  61. chemistry

    The mass of cao that can be prepared by heating 200g of caco3 which is 95 percent pure is
  62. Chemistry

    If only 1.31 grams of water are actually produced in the lab, what is the percent yield?
  63. chemistry

    What mass of Na2SO4 is needed to make 8.5L of 4.0M solution? Is the answer 7480 grams?
  64. Chemistry

    in the reaction: Cl2 + 2HBr ----> 2HCl + Br2 identify the reduced specie
  65. Chemistry

    What is the salt most likely to be formed at the junction of the Fe2+ions and SiO4+
  66. Chemistry

    What is the pH of a solution obtained by adding 15 g deK2SO4em 150 ml NaHSO4 with Molarity of 0, 2 m. HSO4 Ka = 1, 3.10^-2
  67. Chemistry

    Which of the following solutions has a molarity different from the rest? a. 6 N H3PO4 b. 4 N Ca(OH)2 c. 8 N HC2H3O2 d. 2 N NH40H
  68. chemistry

    Make the conversion 8.5 x10^2 cal to Calorie 4.5x10^-1kj to calories
  69. Chemistry

    What size container do you need to hold 0.0459 mol of N2 gas at stp
  70. Chemistry

    Suppose that 30 mL of 0.5 M CsOH and 55 mL of 0.1 M NaHS are mixed. What is the K for the dominant equilibrium in terms of Ka's, Kb's, Kw etc.? Ka of HS- 1/Ka of HS- Kb of OH- 1/Kb of OH- Kb of S-2 1/Kb of S-2 Kw 1/Kw There is no reaction.
  71. chemistry

    explain briefly why CuSo4 is more soluble in water than in organic solvent
  72. Chemistry

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

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

    When 23g of C8H18 is combusted at STP, how many liters of carbon dioxide is produced?
  75. Chemistry

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

    2Mg +O2 > 2MgO Write experiment to prove that the product is basic oxide?
  77. Chemistry

    What volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?
  78. Chemistry

    what volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?
  79. 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?
  80. 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?
  81. chemistry

    How many joules of heat are required to completely covert 95.0 grams of water to steam?
  82. Chemistry

    If you had .1 ml in a 1M solution of HCl how much water would you need to dilute it to a pH of 7?
  83. Chemistry

    How do you find the mass of iron in audio tapes per metre of tape?
  84. 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?
  85. 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 =)
  86. Chemistry

    Use the collision theory to explain the increase in rates of the other reactions
  87. Chemistry

    Balance the reaction step-wise: As2S3(s) + NO3^- + H^+(aq) to AsO4(aq) + S(s) + NO(g) + H2O(l)
  88. chemistry

    Write the equilibrium constant expression for the reaction 2 NO (g) + Br2 (g) ↔ 2 NOBr (g)
  89. Chemistry

    calculate the molarity of a NaOH solution that requires 42.55 mL to neutralize 3.53 grams of KHP
  90. chemistry

    Which type of heat transfer is not blocked even by an insulated thermos? radiation ???
  91. Chemistry

    What is the wavelength of light (in nm) if the energy of the wave is 1.33x 10^-19 J? How do I work this problem out????
  92. Chemistry

    How do i find the PH and pOH of 12.5ml of 15.8M HNO3 added to 400ml of 0.57M KOH
  93. Chemistry

    How many grams of ethanol, C2H5OH, are required to make a 7.1M solution using 1.50 L of water
  94. Chemistry-Dr.Bob222

    Calculate the molar solubility of calcium hydroxide in a solution buffered at each pH. a. pH=4 b. pH= 7 c. pH=9
  95. chemistry

    How many mL of 0.4040 M HNO3 would be needed to neutralize 55.00 mL of 0.1234 M potassium hydroxide?
  96. Chemistry-ish

    What is the pH of a solution that has a OH- concentration equal to 1x10-5M? 14-x 14-5=9 can I use that simple of math 9?
  97. Chemistry

    DrBobb22 Calcule the concentrations of Cd^+2 , [Cd(CN)4^-2] and CN^- at equilibrium, when 0.42 moles of Cd(NO3)2 dissolves in 1 L of 2.50 M NaCN Kf for Cd(CN)4^-2 Help!
  98. Chemistry

    what is the osmotic pressure produced by a 1.20M glucose (CH12O6) solution at 25 degree
  99. chemistry

    white powder of calcium oxide is added to beaker containing water?
  100. chemistry

    what is the actual freezing temperature of a 0.50m aqueous solution of sodium chloride?
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