chemistry! URGENT

61,442 results, page 94

  1. chemistry

    How many grams of ammonia can dissolve in 100g of water at 22 degrees celsius?
  2. chemistry

    Conjugate base of acid H3PO4= I have H2PO-4 Is this correct?
  3. Chemistry

    What mass of KOH is necessary to prepare 799.2 mL of a solution having a pH = 11.65?
  4. chemistry

    here is a redox reaction Fe+ Cu2+„³ Fe2+ Cu Is Fe oxidized and Cu reduced ? and why. Thanks for the help:)
  5. CHEMISTRY

    if a beaker has a rated capacity of 100ml, does it mean that it has to be filled to the bream?
  6. chemistry

    What is the minimum volume of 2.6 required to completely dissolve 20.0 of potassium metal?
  7. chemistry

    Calculate the molarity of a 295 mL solution contain 45 g of ethanol (C2H5OH)
  8. chemistry

    why is it necessary to make up to the 250 ml mark while during dilution?
  9. chemistry

    which procedure is a chemical change that may be used to break down a compound?
  10. chemistry

    how many milliliters (ml) of H2 gas will be produced at 1.0 atm and 25 Celsius all the MG reacts?
  11. chemistry

    What are the oxidizing agents for Formic acid and Ferrous ammonium sulphate?
  12. Chemistry

    Plz help me balance this chemical eqn H2C2O4.2H2O+KMnO4 ---->
  13. chemistry

    Explain why Na2CO3 (stop solution) inhibits -galactosidase activity.
  14. Chemistry

    When 25.0g of Zn reacts, how many L of H2 gas are formed at 298K abd a oressure of 854mmHg?
  15. chemistry

    I have problems with the oxidation numbers of a) POCl3 b) HClO3 Please help!!
  16. chemistry

    what would be the possible limitations we might encounter in doing naphthalene sublimation?
  17. chemistry

    How many moles of dextrose (C6H12O6) are in 264mL of solution with a concentratino of 0.78M?
  18. chemistry

    For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2 could you explain too? thanks!
  19. chemistry

    For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2 could you explain too? thanks!
  20. chemistry

    A Bronsted-Lowry acid is a proton donor. True or False
  21. chemistry

    Air is a gas solution where oxygen is the solvent. True or False
  22. chemistry

    When a base is added to an acid so that neutralization occurs, we say that the solution is at the:
  23. chemistry

    Which reaction illustrates water acting as a Bronsted Lowry base?
  24. chemistry

    Acids are found on the pH scale between the numbers 0-6.9 True or False
  25. chemistry

    calculate the heat liberated when 118g of water at 0 degrees C is frozen?
  26. chemistry

    how many atoms of oxygen are contained in 0.662 mol of magnesium carbonate?
  27. Chemistry

    What is the volume in liters occupied by 37.7 moles of CO2 at 9.54 atm and 55 degrees?
  28. chemistry

    What is the pH value of a buffer made up of 10 ml of 0.1 M NaHCO3 and 5 ml of 0.14 M H2CO3? The pKa for bicarbonate is 6.1?
  29. chemistry

    Jenny please show me in better detail the set up of the answer.
  30. chemistry

    write the reaction of propanal reacting with: CH3CH2NH2 and CH3MgClthen H2O/H+
  31. Chemistry

    35.79 of cr2 (X2O4)3.6H20 contains 8.19H20.what is the atomic wight of x
  32. chemistry

    5 mg iodine 131 its half life is 8.1 days what is the time when 1% remain
  33. Chemistry

    PLEASE HELP! What is the mass of 1.50x10^-2 mol of (NHv4)v2SOv4? v=subscript
  34. Chemistry

    Do 36.0 kg carbon atoms and 3.0 kg hydrogen contain the same number? Explain
  35. chemistry

    What is the molarity if 750. mL of a solution containing 332.5g of copper (II) sulfate
  36. chemistry

    What mass of H2SO4 would be required to react with 0.59 mol of NaOH?
  37. chemistry

    If 20.50 grams of calcium chlorate decompose what mass of each product will form
  38. chemistry

    What are the easiest ways to visualize the shape of molecules with ionic bonds?
  39. chemistry

    lead melts at 106.0 degrees celcius, what is that temperature in faranheit
  40. chemistry

    do the arithmetic and give the answer to the correct number of significant figures. (1.5 x 10^-4 x 61.3) + 2.01 =
  41. chemistry

    CxHyCz compound weighs 132 amu, what is the molecular formula?
  42. chemistry

    how does electrons work together in non-polar covalent bonds?
  43. chemistry

    What is the balanced equation for 0.60M Phosphoric acid and 1.85M NaOH?
  44. chemistry

    molality deft with illastration please give information this topic.
  45. CHEMISTRY

    DRAW LEWIS, KEKULE AND SKELETAL STRUCTURE OF: (CH3)2NCH2CH3
  46. Chemistry

    Using VSEPR what is the shape of ammonia (NH3) and water (H2O)?
  47. Chemistry

    What is the full balanced equation?? Hg2(NO3)2(aq) + HBr(aq) → ?
  48. chemistry

    how many grams of potassium chlorate must be used to produce 30.0g of oxygen?
  49. chemistry

    how many grams of potassium chlorate must be used to produce 30.0g of oxygen?
  50. chemistry

    How many MOLES of oxygen are present in 6.56E+22 molecules of nitrogen monoxide
  51. Chemistry

    Which is more soluble in water: propionic acid or sodium propionate?
  52. Chemistry

    What is the empirical formula if given c-.1929 h-.01079 o-.08566 cl-.1898
  53. Chemistry

    Determine the maximum number of electrons that can have each of the following designations: 6f: 4d: 2f: 5d(yz): 3d:
  54. chemistry

    how many grams of oxygen are needed to create 437 liters of gas?
  55. chemistry

    how much water should i add to neutralize 1000 milliliters oh ph 13
  56. chemistry

    When 15.5 + 0.125 + 2.55 are added, the answer with the correct number of significant figures is
  57. Chemistry

    what is the energy in joules of one quantum of 3^8 m/s? reply in scientific notation
  58. Chemistry

    What you can predict about a reaction whose activation energy is zero?
  59. chemistry

    Balance the following chemical equation: C3H7OH(l) + O2(g) CO2(g) + H2O(g)
  60. Chemistry

    What is the density of a gasoline sample that has a volume of 13.3 mL abd a mass of 8.86 grams?
  61. chemistry

    What mass of water is produced from the complete combustion of 2.50×10−3 of methane?
  62. chemistry

    What mass of oxygen is needed for the complete combustion of 2.50×10−3 of methane?
  63. Chemistry

    Write and balance equation for the complete combustion of decane, C10H22
  64. chemistry

    From the balanced equation for tums and .0072mL calculate no. moles titrated.
  65. Chemistry

    What mass of KH2PO4 is needed to prepare 500.0 mL of a 0.067M solution?
  66. Chemistry

    What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?
  67. chemistry

    What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?
  68. chemistry

    Given density of Mercury, 200.59....how do I calculate for the mass of 33.5mL
  69. Chemistry

    Is there any way to increase the ionic strength of a solution without increasing the pH?
  70. chemistry

    calculate the freezing point of a .05500 m aqueous solution of NaNO3
  71. chemistry

    DrBob222- Is STP = to 273K? If so, would i use P1V1/T1 = P2V2/T2??
  72. Chemistry

    NaCl+H2SO4 Write the balanced net ionic equation.
  73. Chemistry

    NaBr+H2SO4 Write the balanced net ionic equation.
  74. chemistry

    KI+H2SO4+KIO3 Write the balanced net ionic equation.
  75. Chemistry

    Ba(OH)2(aq)+2CH3COOH(aq)=Ba(CH3COO)2(aq)+2(l)H2O what is the net ionic equation with phases?
  76. Chemistry

    I'm abit confusd hw to find the% of H2O of crystallization Na2SO4.10H20
  77. chemistry

    If hydrated sodium carbonate contains 6.0 g of carbon, find its mass.
  78. chemistry

    Calculate the mass of solvent that would contain 3.0 mg of a drug if the concentration was 3.5%
  79. Chemistry

    When 3.2 moles of Al react with excess HNO3 at STP, How many liters of H2 are formed
  80. chemistry

    what volume does 2.5 moles of carbon monoxide occupy at 50.5 kPa pressure and 20.0 C?
  81. chemistry

    4KCl + 4HNO3 + O2 ==> 4KNO3 + 2Cl2 + 2H2O what kind of reaction is this?
  82. chemistry

    Calculate pH for strong base solution: 15.0 mL of 1.20×10^−2 M Ca(OH)2 diluted to 460.0 mL
  83. Chemistry

    Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
  84. chemistry

    2Al(S)+3H2O(g)---->Al2O3(s)+6H2(g) A.) what is the correct equilibrium expression?
  85. chemistry

    if we have 1 galon of C8H18 hom many galons of water will be produce?
  86. chemistry

    Do hydrogen bonds form between methanol (CH3OH) molecules?
  87. Chemistry

    What is the molarity of an aqueous ammonia solution that has an OH- concentration of 0.0011 M? Kb = 1.8x10-5
  88. Chemistry

    What is the molarity of an aqueous ammonia solution that has an OH- concentration of 0.0011 M? Kb = 1.8x10-5
  89. Chemistry

    In 1 mole of CaCl2 there are ____ moles of chloride ions. A. 1 B. 2 C. 0.5 D. None of these
  90. Chemistry

    How many deciliters of carbon dioxde are produced when 0.38L SO2 is formed?
  91. Chemistry

    A 0.035 M solution of a weak base has a pH of 10.88. What is the Kb for the acid? Where Di I even begun**???
  92. Chemistry

    Calculate the pH of an aqueous solution containing 3.8 10-2 M HCl, 1.0 10-2 M H2SO4, and 3.3 10-2 M HCN.
  93. Chemistry

    What kind of orbital is designated by the quantum numbers (3,1,1,1/2)? Answer s, p, d, or f only.
  94. Chemistry

    would the melting range of a new compound be worth determining and if so, why?
  95. AP CHEMISTRY

    Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5
  96. AP CHEMISTRY

    Calculate the solubility of Mn(OH)2 in GRAMS PER LITER when buffered at each of the following. a)pH 7.4 b)pH 9.2 c) pH 11.5
  97. chemistry

    what is the wave lenghth of the alpha particle Po which has velocity of 15x10 to the power 6 ms-1
  98. Chemistry 2

    If 20 mL of .10 M H2SO4 was added to 50 mL of .10 M NaOHand the mixture was stirred, then tested with a pH meter. What is the pH?
  99. Chemistry

    What are the components that serve as electrolyte,anode and cathode in dry cell?
  100. chemistry

    what is the solubility of X in mole/dm3 if 25cm of its saturated solution contains 4.0g of X.
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