chemistry! URGENT

61,546 results, page 96

  1. Chemistry

    Calculate the temperature at which k = 2.0 s-1 if k = 10.0 s-1 at 371 K. The activation energy for the reaction is 30.0 kJ mol-1.
  2. chemistry

    What mass in kilograms of E85(d = 0.758g/mL) can be contained in a 11.5gal tank?
  3. chemistry

    What is the density of a sphere with a radius of 12.7 meters and a mass of 285 kilograms?
  4. Chemistry

    What does the reaction of alkaline earth metals with water tell you? Thanks in advance.
  5. chemistry

    The concentrations of Ca and Na in a sample of river water are 13.4 mg/kg and 5.2 mg/kg. Express the concentration in molality
  6. Chemistry

    Calculate the H+ ion concentration if 0.20M NH3 solution is 2.5% ionized.
  7. Chemistry

    Which element has no stalbe isotopes: 82Pb, 27Co, 51Sb or 90Th?
  8. AP Chemistry

    What is the molarity of 827 mL of a solution that contains 0.057 mol of solute?
  9. Chemistry

    If your body develops a charge of -18 (microcoulombs), how many excess electrons has it acquired?
  10. General Chemistry

    A solution of LiCl in water has XLiCl = 0.0800. What is the molality?
  11. chemistry

    how would you, explain ans how calcium chloride [CaCl2] is bonded.
  12. chemistry

    how many grams of carbon dioxide can be produced by burning 7.04moles of propane
  13. chemistry

    What is the nuclear symbol for the radioactive isotope of copper with a mass number of 60?
  14. Chemistry

    Calculate the molarity of a 100. mL solution containing 22.3 g of sucrose (C12H22O11)
  15. chemistry

    large and small number are most easily handle when expressed in
  16. chemistry

    Which of the following elements is synthetic? uranium iodine helium nobelium
  17. Chemistry - ASAP please!

    what is the hybridisation state of the oxygen of a carbonyl group
  18. chemistry

    Radon-222 undergoes alpha decay.what is the nuclear equation
  19. Chemistry

    What is the temperature change in celsius when 29.5L of water absorbs 2.3 kwh of heat?
  20. Chemistry

    Round this to two sig figs: 4025000 Is the correct answer 4.0 x 10^6?
  21. Chemistry

    calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a height of 6.6 .
  22. chemistry

    what type of bond would carbon, sodium, and neon form?
  23. chemistry

    what is the complete ionic equation for the double displacement of CuNO3(aq)+K2S(aq)
  24. Chemistry

    How would we make 500mL of a 1.5 percent w/v solution of KCl in water?
  25. Chemistry

    The solution CrCl3 is not colored. What does this suggest about its electron configuration?
  26. chemistry

    A radio broadcasts at 101.3 Megahertz. What is the wavelength of the signal in meters?
  27. chemistry

    for depolarization of 1 mole of KMnO4, the moles of H2O2 required is_________
  28. chemistry

    How much L and concentration of NaOH do i need to neutralize 500 L 22% HCL?
  29. Chemistry

    Balance the equation and write the reaction-quotient expression, Qc. U(s) + F2 (g) <----> UF6 (g)
  30. Chemistry

    How many photons with a wavelength of 450 nm is required to have mass of 1.25 micrograms?
  31. chemistry --

    What determines whether 2 or 3 electrons will be removed from Fe when it reacts with another chemical or element?
  32. chemistry

    'electrolysis of dilute aqueous solutions kcl,cucl2,kl,agno3'?
  33. Chemistry

    A radio wave has a frequency of 3.6 x 10^10 Hz. What is the energy (in J) of one photon of this radiation?
  34. Chemistry Lab

    Does the pressure exerted by a gas depend on its molar mass?
  35. chemistry

    What is the chemical formula of the compound that forms between lithium (Li) and phosphorus (P)?
  36. Organic Chemistry

    what is the major product of a reaction with 1-butene and Br2 in water?
  37. CHEMISTRY

    Are you always solving for final volume in the combined gas law?
  38. Chemistry

    #26 The Ksp of lead(II) carbonate, PbCO3, is 7.40 × 10-14. Calculate the solubility of this compound in g/L.
  39. Chemistry

    #25 The Ksp of nickel(II) hydroxide, Ni(OH)2, is 5.84 × 10-16. Calculate the molar solubility of this compound.
  40. Chemistry

    If 25.9 mL of 300 M NaCl is diluted to 136 mL, what is the molarity of the dilute solution?
  41. Chemistry

    Which metal ion produces the light with the highest energy? a. Na+ b. Ca+ c. K+ d. Ba2+
  42. chemistry

    calculate the value of the equilibrium constant K for this reaction A+B <--> C from the following information 3C <--> D Kc= 7.1*10^-4 D <--> 3A + 3B Kc= 2.9*10^-2
  43. chemistry... HELPP

    What is the cell potential for the reaction Mg(s) + Fe^2+(aq) -----> Mg^2+(aq) + Fe (s) at 63 degrees celsius when [Fe^2+]= 3.30 M and [Mg^2+]= 0.110 M
  44. Science- chemistry

    After extraction with bicarbonate in which layer is the benzoic acid?
  45. chemistry

    Which of the following does NOT belong with the others? A. HNO3 B. H2SO4 C. H2CO3 D. OH- I think D
  46. chemistry

    Just wanted to say thank you very much for the help I got from everybody :)
  47. chemistry

    Give the orbital designations of electrons with the following quantum numbers" (a) n = 3, l = 0, m1=0 (b) n=2, l=1, ml=-1 (c) n=4, l=3, ml=-2 (d) n=4, l=2, ml=0
  48. Chemistry

    How many grams are in 50.0 mL 2.0 M of HCl? Please help me!!! I think the answer is 3.57g but I am not sure. Thank you :)
  49. chemistry

    calculate the mass of naso4 needed to prepare of 0.5L of 0.15M of solution
  50. chemistry

    what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?
  51. chemistry

    what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?
  52. Chemistry

    Select all suitable dopant atoms from the following list: P B Mg Ga As In Sb Al Tl H
  53. chemistry

    If isomers of an alkane have the same molecular formula, how do they differ?
  54. chemistry

    solve the following and express your answer in scientific notation: (5.3 x 10^4) + (1.3 x 10^3) A. 5.4 X 10^4 B. 5.4 X 10^8 C. 6.6 X 10^7 D. 6.9 X 10^7 I say c
  55. chemistry

    How would you prepare a supersaturated solution of CuSo4 in 100ml of water
  56. Chemistry 1115

    How do you calculate the molarities of HC2H3O2 and NaC2H3O2 in a buffer solution?
  57. Chemistry

    How to predict the possible structures of a compound if the degree of unsaturation of it is in fraction?
  58. Chemistry

    How many kilograms of chalcopyrite must be mined to obtain 315g of pure Cu?
  59. chemistry

    How many moles of glucose would be present in: 1Litre of a 5micromolar solution?
  60. Chemistry question

    Why do ionic compounds have high melting points?
  61. Chemistry

    What type of bonds(sigma or pi) and how many of each are used to form a triple bond?
  62. chemistry

    what is the external pressur, if ethanol is boiling at a temperature of 70 degrees celsius
  63. Chemistry 3A

    what volume would 10.5 g of nitrogen gas, N2, occupy at 200 K and 2.02 atm?
  64. chemistry

    what is the pH of the solution formed when 25 mL of 0.173 M NaOH is added to 35 mL of 0.342 M HCl?
  65. chemistry

    what is the pH of the solution formed when 25 mL of 0.173 M NaOH is added to 35 mL of 0.342 M HCl?
  66. Chemistry 3A

    calculate the empirical formula for an unknown compound from the following information: C= 39.2%, H= 8.73% and O= 52.1%
  67. Chemistry

    what is dispersion,dipole,hydrogen bonding of HBr NH3 NaF
  68. Chemistry

    what is dispersion,dipole,hydrogen bonding for NaF,N3H,NaBr.
  69. chemistry

    What are the steps in finding the balanced equation for the complete combustion of benzene?
  70. Chemistry

    How many grams of acetic acid must be dissolved to produce 3875 ml with a Ph of 2.9?
  71. Chemistry

    How many grams ofPbCl2will dissolve in 2.00 L of O.650M aqueous Pb(N03)2 solution?
  72. chemistry

    Identify the feature below using correct crystallographic notation.
  73. chemistry

    how do i find ratio of volumeHcl/volumeNaoh for my first trail of titration?
  74. chemistry

    What is the allowable concentration of six organic pollutants in drinking water?
  75. chemistry

    What is the allowable concentration of six organic pollutants in drinking water?
  76. chemistry

    What is tag name for the smallest particleof covakentlg bonded ccompound?
  77. chemistry

    How many grams of NH2OH are needed to prepare 250mL of a solution with a pH of 9.56? kb=6.6x10^-9
  78. chemistry

    though water has V shaped,why doesnot it scratch our throat?
  79. Chemistry

    An aqueous solution of (NH4)2SO4 has a pH lower than 7. Explain this observation. Thanks! :)
  80. chemistry

    0.1 mole of kmno4 react with excess of h2o2 then volume of o2 liberated
  81. chemistry

    what is the ph of a soln that contain 0.01M HNO3 and 0.1M CH3COOH. for acetic acid,ka=1.8*10-5
  82. chemistry

    which is more endothermic in water, ammonium chloride or potassium nitrate
  83. chemistry

    Ethylene glycol (antifreeze) has a density of 1.11 g/cm^3 What is the volume in liters of 3.42 kg of this liquid?
  84. chemistry

    Explain very briefly why the boiling point of H2O is higher than that of H2
  85. chemistry

    3. Find the molarity of a solution made from 734 g of Li2SO4 and 2.5 L of water
  86. organic chemistry

    what is this compound, it has a mf of c6h12o i. imgur. com/gCgw0Hi. png
  87. Chemistry

    What is the density, in grams per liter, of N subscript 2 gas at STP
  88. Chemistry

    what are the products when water,ferric chloride and ammonium thiocyanate are combined?
  89. Chemistry

    ​What is the point called on a graph of pH vs log {[A-]/[HA]} when [A-] = [HA]?   Graphs are listed as “y vs. x”.
  90. Chemistry

    Determine the normality of 91.2 g of HCl in 4.3 L of solution. (Round to the nearest hundredth.)
  91. Chemistry

    How many molecules are there in 24 grams of FeF3 ? Can somebody please show me how i can get to the answer ? Thank you
  92. chemistry

    how many grams of magnesium are required to react with 2.0 moles of hydrochloric acid?
  93. college chemistry

    How many grams would you weigh out to get 3.1 X 10-3 Moles of MgCl2?
  94. Chemistry

    What mass of iodine contains the same number of atoms as 50.0g of chlorine?
  95. general chemistry

    the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density
  96. chemistry

    1oocm3 of 0.1mhcl as to be prepared from 2mhcl, how much of the stalk is required
  97. chemistry

    The charge and identity of an ion with 16 protons, 18 electrons and 17 neutrons would be?
  98. Chemistry

    Calculate the pH of 75 ml of the buffer composed of .1M HC2H3O2 with .2M NaC2H3O2; to which 9.5 ml of .1M HCl is added.
  99. Chemistry

    How much 2 M KOH must be added to 0.5 L of 0.2 M glycine at pH 8 to bring its pH exactly to 10?
  100. Chemistry

    If you mix 10 mL of 6 M HCl (aq) and 10 mL of 3M NaOH, will the solution be acidic, neutral, or base?
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