chemistry! URGENT

61,442 results, page 63

  1. chemistry

    Which atom in each of the following pairs has a larger radius? a) Na or K b) V or Zn c) V or Ta d) Li or Ba
  2. chemistry

    what is the name of the 9 carbon continuos-chain alkane?
  3. Chemistry

    How do you balance the equation? MnO4^-1(aq) + C2O4^-2(aq)-> Mn^+2(aq) + CO2(g)
  4. Chemistry

    If ions O^2- are added to water, what reaction, if any, occurs?
  5. chemistry

    a 0.01M aqueous NaOH has a hydroxide concentration of ---- M
  6. Chemistry

    Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
  7. Chemistry

    Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.
  8. Chemistry

    What generally happens to metal oxides when you heat them ?
  9. chemistry

    what is the boiling poinj of cs2,naf andco2
  10. chemistry

    what is the percent by mass of carbon in c3h8? A. 18.20% B. 20.0% C. 81.8% D. 85.0% I say A
  11. Chemistry

    how do I determine the Ka for an acid HX if th epH of a 1.00M solution of HX is 4.5
  12. Chemistry

    The pressure exerted by a gas in a container depends on? and why?
  13. chemistry

    What is the final daughter nuclide for 131I ? How is it determined?
  14. Chemistry

    How many moles of oxygen are required for the combustion of 25.5 g of magnesium?
  15. chemistry

    Explain the effect of molecular polarity on behavoir
  16. chemistry

    is water hard or soft if it contains 1.8 moles
  17. Chemistry

    What is C2H5OH+3O2>CO2+H2O balanced?
  18. chemistry

    Mg + Au+ -> Mg2+ + Au what is the oxidation and reduction half reactions
  19. CHEMISTRY

    how many atoms of C are present in 315.93 g (6.79e24 molec) of CO?
  20. chemistry

    4.05 g of an unknown gas at 73 °C and 1.00 atm is stored in a 2.25-L flask.
  21. College Chemistry

    Is .1M NaH2PO4 a good buffer? Explain.
  22. chemistry

    the oxidation number of Mn in MnO4- is +4 (true or false)
  23. Chemistry 3A

    how do i find the number of moles of oxygen atoms in: Al(OH)3
  24. chemistry

    how many molecules are present in 1.2 mol of glucose, C6H12O6?
  25. chemistry

    What is the molarity of 5g of O2 in 250 mL? Show work, please.
  26. Chemistry.

    How do I calculate the internuclear distances for KF, KCl, KI, and KBr?
  27. Chemistry

    How many electrons are there in the unipositive ion of Cs-136 (#55)? How many neutrons?
  28. chemistry

    calculate the number of moles in this quantity: 52.5 mg ZnCl2=?
  29. chemistry

    howto the answer arrived anyone explain pls.....
  30. chemistry

    What is the type of glycosidic bond in case alpha?
  31. chemistry

    what are four examples of solution for which the concentration must be known?
  32. chemistry

    What are four origins of pollutants in natural water?
  33. Chemistry..

    Reaction type that is being represented? S D SR DR C C3H6 + O2 --> ?
  34. chemistry

    balance H2SO4 + NaOH --> H2O + Na2SO4
  35. chemistry

    How many atoms of carbon are in 325 g of tin (II) acetate?
  36. Chemistry

    What is the equation to show that boiling is a cooling process?
  37. organic chemistry

    malonic ester with urea gives
  38. chemistry

    What is the kd of ethanoic acid between isobitanol and water?
  39. chemistry

    electrostatic interaction is important with what type of bond
  40. Chemistry

    Why is the emperical formtlar of C3H6O2 multiplied by 2 when calculating?
  41. Chemistry

    What coeffients do you need for NaCL+Ca(OH)2=CaCl2+NaOH
  42. chemistry

    Explain the effect of chlorine (cl) in aromatic ring
  43. Chemistry

    What is the mole fraction of solute in a 3.26 m aqueous solution?
  44. chemistry

    How many orbitals are contained in the n=2 level? Give the l and ml values of each of them.
  45. Chemistry

    a sample of silver chromate has a mass of 78.6 grams?
  46. Chemistry

    # of moles of oxygen in 2 L @ 24 deg C & 750 torr?
  47. chemistry

    How do you know that atoms can be separated without chemical reactions?
  48. chemistry

    what is the density of methane gas at 2o degree and 115kpa?
  49. organic chemistry

    how do I to draw cyclopropane of bond rotation?
  50. chemistry

    i have some question but i can not post it ,what should i do .help
  51. chemistry

    net ionic equation for KI+Na2So2O3+KCl
  52. CHEMISTRY

    how will i know if the given formula is an element, compound or mixture?
  53. chemistry

    Which best describes the transition from gas to liquid?
  54. Chemistry

    What is the mass of lithium chloride in 27.8g of a 4.85% (m/m) LiCl solution?
  55. chemistry

    What volume of 0.1 M NaOH is required to neutralize 30 mL of 0.1 M HCl?
  56. chemistry

    why we cant use hcl to react with Fe to create fecl3?
  57. Chemistry

    How many grams of sulfuric acid is in 25.0 g of 8.00 % H2SO4 solution?
  58. chemistry

    Effect of temperature on surface tension an viscosity ?
  59. chemistry

    Why is Fe3+ likely to precipitate in the presence of oxygen?
  60. Chemistry

    Thanks Dr.Bob On the periodic table, which block has 5 orbitals? Is it s, p or f? Thanks.
  61. chemistry

    why is the graph of the meliting points of hydrocarbons not consistent?
  62. chemistry

    How many atoms are in 10.0 cm3 of mercury (at room temperature)?
  63. chemistry

    difference between solution and pure substance
  64. chemistry

    what mass of Fe3O4 would conatin 1.85*10^21 atoms of Fe?
  65. chemistry

    convert 725mm Hg into equivalent kPa
  66. Chemistry

    Experimentaly discribe how to determine the formula of magnesium.
  67. Quantum chemistry

    For the simple harmonic oscillator determine: b. [Tˆ,Vˆ ]
  68. chemistry

    Express your answers as integers separated by commas.
  69. Chem

    hydrate mean in an inorganic chemistry context
  70. chemistry

    What volume (mL) of a 3.23 %w/v saline solution contains 69.1 mg of NaCl?
  71. Chemistry

    How many grams of carbon are in 4.30×1023 molecules of (C3H5)2S?
  72. Chemistry

    Why is it important to identify the limiting reactant in stoichiometry?
  73. Chemistry

    What is the volume of 0.674 kg of acetylene, C2H2, at STP?
  74. chemistry

    find the concentration of Pb^2+ in equilibrium with PbBr_2_ and 0.10M Br^-
  75. chemistry

    find the concentrations of Ca^2+ and F^- in a saturated solution of CaF_2_
  76. Chemistry

    What is the change in enthalpy when 17.0 g of liquid mercury is heated by 31°C?
  77. Chemistry

    What is the wavelength of an electron traveling at 7.59% of the speed of light?
  78. chemistry

    how do you use aldehydes to prepare acyl chlorides?
  79. Chemistry

    Is the dissolution of calcium sulfate endothermic or exothermic? How do you know?
  80. Chemistry

    What is the enthalpy for the following reaction? N204 = 2NO + O2
  81. chemistry

    How many moles of hno3 neede to prepare 7.5 l of a 5.6m solution
  82. chemistry

    What is the solubility of AgCrO4 (Ksp= 9.0 x 10^-12) in distilled water?
  83. Chemistry

    the ka of hypochlorous acid hclo is 3.5 x 10^-8. What is Kb for the hypochlorite ion?
  84. chemistry

    How many grams are in 4.00mol of sodium chloride (\rm NaCl)
  85. Chemistry

    How do I quickly identify whether or not a salt is soluble?
  86. Chemistry

    Can the reaction 2Ni(s)+MgSo4(aq) occur.Explain why?
  87. chemistry

    ch4(g)+nh3(g) translate into words help!
  88. chemistry

    If 22.0 of gas has a volume of 0.22 at 320 , what is its pressure in mmHg?
  89. chemistry

    calculate the L of 5.00 M HCI required to neutralize 500.0 mL of 1.00 M Ca (OH)2
  90. Chemistry

    what volume does 3.01x 10^21 molecules of N2 occupy at STP
  91. chemistry

    what is the mass of LiF is needed to produce 2.5 L of a .30 M solution
  92. Chemistry

    How many grams of co2 are in 3.92 times 10 to the 24th molecules
  93. chemistry

    net ionic equations for Ca(NO3)2 +NaPO4
  94. chemistry

    C2H5OH+O2-CH3COOH+H2O HOW MANY MOLES OF ETHANOL IN 5g
  95. Chemistry

    What is the equation for the reaction of potassium soap with HCL?
  96. Chemistry

    What is the solubility of Ca3(PO4)2 in 0.045 M of CaCl2
  97. chemistry

    is there a chemical equation for gadolinium medium contrast?
  98. Chemistry

    What is the pH of a solution that is 0.0100 M in HCN and 0.0200 M in NaCN?
  99. Chemistry

    What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.
  100. Chemistry

    What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.
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