chemistry! URGENT

61,546 results, page 93

  1. chemistry

    what is an ionic compound that forms an acid-base neutralization reaction?
  2. Chemistry

    I need help writting a formula for: AgNO3(l) + PbNO3(l) + HgNO3(l) + HCl (l)
  3. chemistry 101

    How many grams of oxygen are in 40.1 g of calcium hydroxide? options: 17.3 g 8.64 g 20.1 g 0.541 g 11.2 g
  4. chemistry

    a gasoline tank has a mass of 60 kg and a density of .752 gcm^3 what is the volume
  5. Chemistry

    What is the molarity of a solution containing 40 grams of NaOH in 100 ml of soution
  6. chemistry

    Explain how the addition of a solute affects the vapor pressure of the solvent.
  7. Chemistry 111

    What is the mass of 7080 moles of magnesium chloride (MgCl2)?
  8. chemistry

    How many grams of KMnO4 should be used to prepare 2.00 L of a 0.500M solution?
  9. chemistry

    What volume of 0.25M solution can be made from5.0 gof KCl?
  10. chemistry

    How many grams of CuCl2 are required to make 75 mLof a 0.20M solution?
  11. chemistry

    1-why should the maximum percent yield never be above 100%?
  12. chemistry

    A level teaspoon may contain 4.0 grams of NaHCO3. How many moles does this represent?
  13. chemistry

    why do you use Na2Co3 extract solution tor the analysis of anions
  14. chemistry

    an example of a transition element having completely filled d-orbital is zn Ti v Cr
  15. chemistry

    which of the following correctly compare the rate of diffusion of oxygen to that of hydrogen 1) 1:4 2) 4:1 3) 16:1
  16. chemistry

    how can I prepare sebacoyl chloride from sebacic acid with excellent yield?
  17. chemistry

    What happens to the physical properties as the strength of intermolecular forces increases?
  18. chemistry

    explain fisrt ionization energy across period three
  19. chemistry

    give a balanced equation between phosperuos and sodium hydroxide
  20. chemistry

    What will be value of molarity and strength %w/v respectively 30V H2O2 solution
  21. chemistry

    calculate the number of moles of sodium carbonate in one dm3
  22. Chemistry

    What is the chemical reaction between Phosphoric Acid and Disodium Phosphate?
  23. Chemistry

    How many grams of bromine liquid are needed to make 6 moles of KBr?
  24. Chemistry

    What is the mass of 36.0mL of a liquid if its density is 2.70g/mL? is the right answer 97.2 g?
  25. CHEMISTRY

    may i please get some notes on stoichiometry because i don't seem to be getting anything.
  26. chemistry

    A can of soda has 1.50x10^2 calories. Convert this energy to units of joules.
  27. chemistry

    what mass of Ca is needed to completely react with 5.0M of .250ml Copper I Phosphate?
  28. Organic Chemistry

    What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
  29. Organic Chemistry

    What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
  30. Organic Chemistry

    What are the theoretical moles and grams obtainable when 53.9g of ethanol is dehydrated?
  31. Ap Chemistry

    HOw much energy is required to ionize a mole of Hydrogen atoms?
  32. chemistry

    how do you calculate density of a substance with a mass of 100g and a volume of 48ml
  33. Chemistry

    The media you need has .9% NaCl and 2% glucose. How would you make 1 L of this solution?
  34. chemistry

    How much energy (in kilojoules) is released when 21.0 of ethanol vapor at 94.5 is cooled to -19.0?
  35. chemistry

    pls. explain why the copper element has two ion charge?
  36. chemistry

    calculate the freezing point of 0.1m of a)NaCl (b) glacial acetic acid
  37. lab chemistry

    what is the boiling point of 2-propanol at the top of pike's peak
  38. chemistry

    If the equilibrium constant for the carboxyl group of glycine is 2x10^-3, what is the pk value?
  39. chemistry

    Calculate the number of grams of Fe found when 0.400kg of Fe2O3 reacts
  40. chemistry

    How many grams of Al(NO3)3 are needed to prepare 25.0 mL of a 0.750 M aqueous solution.
  41. chemistry

    What would be the result if 5.0 L of hydrogen was burned with 2.0 l of oxygen in a closed container?
  42. Chemistry

    Calculate the pH of 0.0115M acetic acid solution at 25 degrees celcius with Ka=1.75*10^-5
  43. Chemistry

    How many moles of ions are released when this sample dissolves in water? 26.4 g of Ba(OH)2·8H2O
  44. chemistry

    If a solution containing 0.22 M Cl -, Br -, I -, and CrO42- is treated with Ag+, in what order will the anions precipitate?
  45. chemistry

    how do you get to the ionic equation for sodium hydroxide (aq) reacting with sulphuric acid.
  46. chemistry

    how do you get to the ionic equation for sodium hydroxide (aq) reacting with sulphuric acid.
  47. Chemistry

    What volume will 12.0 grams of neon gas occupy at 25 degrees C. and 3.05 atmospheres?
  48. chemistry

    how to you find the partition coefficient of the benzoic acid in CH2Cl2 in water
  49. chemistry

    How many grams of water should you add to 33.0 of sucrose, , to get a 0.795 solution?
  50. CHEMISTRY

    WHAT ARE FACTOR FAVOURING THE FORMATION OF A COVALENT BOND SHORT NOTE?
  51. Chemistry

    Why is it necessary to correct the pressure of a gas that is collected over water?
  52. Chemistry

    If the pressure on a balloon were quadrupled what would happen to the balloons volume?
  53. Chemistry

    How many CO2 molecules can be made with 0.500 mol of oxygen atoms?
  54. Chemistry

    calculate the mass of 8.766 x 10^ 25 molecules of acetic acid , HC2H3O2
  55. Chemistry(Please check)

    What is the oxidation number of chromium in K2Cr2O7 so k=+1 (2) = 2 O=-2(7) = -14 2x + 1 +(-14) = 0 2x-12=0 x=6 so Cr is 6 Is this correct?? Thank you!!
  56. Chemistry

    Write a balanced equation for copper oxide + Ethanoic Acid
  57. chemistry

    34.42mL of 0.1013 M NaOH is used to titrate a 25.00 mL sample of H2SO
  58. chemistry

    The total number of atoms in 0.111 mol of FeCO3(PH3)2...?
  59. Chemistry

    how many ions and moles does 113 mL of .490 M aluminum chloride have?
  60. chemistry

    What is the pH of a solution prpared by mixing 50.0 ml of .200 M HCLO4 with 10.0 ml of .100 M KOH
  61. chemistry

    What is the pH of a solution prpared by mixing 50.0 ml of .200 M HCLO4 with 10.0 ml of .100 M KOH
  62. Chemistry

    Explain why it is necessary to form a double bond in the Lewis structure.
  63. organic chemistry

    (x/15)/[(1.5-x)/45]=5.8 how do I move these around to find x partition coefficient equation
  64. organic chemistry

    (x/15)/[(1.5-x)/45]=5.8 how do I move these around to find x partition coefficient equation
  65. chemistry

    describe the neutralisation reactions that take place on everyday basis
  66. chemistry

    Account for the increase in reaction rate brought about by a catalyst.
  67. chemistry

    Find the normalization constant for the wave function (e^-bx).(e^+bx)(one dimension)
  68. Chemistry

    At what temperature (oC) will a gas sample occupy 9.8 L if it originally occupies 14.2 L at 25.9oC?
  69. Chemistry

    What would be the number of elements in the fourth row of the periodic table?
  70. Chemistry

    Write an equation showing the bicarbonate ion acting as an acid.
  71. chemistry

    what will happen when you drop a ball of naphthalene in a 25ml gasoline.will it dissolve or not?
  72. chemistry

    how many milliliters of concentrated NaOH(19.3 M) are needed to make 8.00 L of 0.25 M base solution?
  73. chemistry

    Calculate [H3O ], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C.
  74. Chemistry

    Which ion is more strongly hydrated , 1)Fe3+ and Fe2+? 2)Li+ and Na+ ? Thank for helping!
  75. organic chemistry

    what are the formulas of the salts that may precipitate when the reaction mxture is cooled?
  76. Chemistry

    What caroxylic acid and alcohol is needed to produce isopentyl propionate?
  77. Chemistry

    What carboxylic acid and alcohol is needed to produce propyl acetate?
  78. Chemistry

    What carboxylic acid and alcohol is needed to produce isobutyl propionate?
  79. Chemistry

    What caroxylic acid and alcohol is needed to produce isopentyl propionate?
  80. Organic Chemistry

    If a student extracts first with NaOH then with NaHCO3, what will be the result?
  81. chemistry

    a 0.296g of CO2 has a volume of 565ml and a pressure of 425mmHG, what is the temperature??????
  82. chemistry

    is this correct? making sure I did this right CH3CH2CH2CH2-Br ans: 1-bromobutane
  83. Chemistry

    So what do I do after I divide the mass by 2? Refer to previous question please
  84. Organic chemistry - Nitration

    Why does the amount of dinitration increase at high temperatures?
  85. Chemistry

    calculate the energy associated with a photon whose wavelength is 14.5*10^-8cm.
  86. Chemistry

    Calculate the mass ( in grams) of one mole of methane molecules (to .01 g)
  87. chemistry-wavelengths

    what is the wavelength in nm of radiation having a frequency of 2.45x10^9Hz
  88. chemistry

    Draw the lewis structure for: SiO3 -2 CNO- TeO4 -2 F2PPCl2 thanks!
  89. chemistry

    What is the boiling point of an aqueous solution that freezes at -6.7 degress C. Please help.
  90. chemistry

    what is the molarity of an aqueous solution that is 6.75% glucose by mass? Assume a density of 1.03 g/ml
  91. Chemistry

    Which of the following substances is capable of reducing bromine, Br2? Cl- H2 Ni or Au I think its H2
  92. Chemistry

    Calculate the pH of a solution made with 0.240 M H3PO3 and 0.480 M NaH2PO3.
  93. Chemistry

    Describe how you could make approximately 5 g of a 3% (w/w) ferrous ammonium sulfate solution
  94. Chemistry

    CH3CH2CH(BR)CH=C(BONDED TO A METHYL ON ONE SIDE AND AN ETHYL ON THE OTHER)
  95. Chemistry

    If an atom gains energy, is it in a more stable or unstable state?
  96. chemistry

    How many moles of sugar are required to react completely with 3.26 mol of oxygen?
  97. chemistry

    Sorryy but I still don't understand will you show the calculations for my previous question
  98. Chemistry

    For the reaction 2 N2O <===>O2 + 2 N2 what happens to the equilibrium position if the pressure is increased
  99. Chemistry

    Determine which is larger member of each pair A) Mg2+ or Al3+ B) N3- or O2-? Explain
  100. Chemistry

    HZ is a weak acid. A concentration of 0.020M in aqueous solution gives a pH of 4.93 what is the Ka?
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