chemistry! URGENT

61,662 results, page 76

  1. chemistry

    How are cis trans isomers used for night vision?
  2. chemistry

    make 98.5 mL of 1.25 M barium nitrate from a 4.50 M solution. i do not know what to do with this information
  3. Chemistry

    What is sodium acid pyrophosphate used for in food products.
  4. chemistry

    What is the volume at STP, in liters, occupied by 26.4 g of F2 gas?
  5. chemistry

    What would be the change in enthalpy if you detonated 10 grams of NI3?
  6. Chemistry

    would adding more CaCl2 to Na2CO3 produce more chalk
  7. chemistry

    What is the electronegativity difference for a bond between potassium and iodine? A. 3.3 B. 0.4 C. 4.6 D.1.7
  8. Chemistry

    How many grams of O2 are there in a 50.0L tank at 21*C when the pressure is 1.19x10^4mmHg?
  9. chemistry

    determine the number of moles of FeSO4 in sample Y that you use
  10. Chemistry

    Need help with this-- 36. Balance this equation using coefficients. Fe + O2 --> FeO (the 2 is small) Thanks -MC
  11. Organic Chemistry

    Do you expect acetaminophen to be soluble in water? why or why not?
  12. Organic Chemistry

    Do you expect acetaminophen to be soluble in 1.0 M NaOH? why or why not?
  13. Chemistry

    What is the pH of a 0.50 M solution of NaNO2 if the Ka of H20x = 4.5 x 10^-4. I know that you use the Ka to find Kb and solve from there, but why?
  14. chemistry

    order Se, S, As, by increasing atomic radius? explain why?
  15. Chemistry

    How many moles of O are there in 32.4g N2O5, how many oxygen and nitrogen atoms are there in the 32.4g?
  16. chemistry

    why should we add 273 to convert a given celcius value in to kelvin?
  17. Chemistry

    A solid at room temperature that can conduct electricity
  18. chemistry

    how do you how do you find the mass of a solution, given the density is 1.022 g/mL.
  19. chemistry

    what is the precipitate form of 2naoh+cuso4->na2so4+cu(oh)2
  20. chemistry

    what type of a ligand would 18 crown 6 ether be? hexadentate?
  21. chemistry

    how many grams of oxygen is required to produce 2.0 kg of water??
  22. chemistry

    about how many bacteria (e coli) would you have to line up to stretch 1mm??
  23. chemistry

    how to explain that HCL is a stronger acid than HOCL?
  24. chemistry

    what solution of sugar in water has the highest molarity?
  25. chemistry

    how wouldi figure out how many moles are in 3.52 times 10 ^23 F atoms?
  26. chemistry

    why did the solution turn to pink at the end of the titration ?
  27. chemistry

    symbol used in a chemical equation to indicate the phrase with react with?
  28. chemistry

    how many moles of solute are contained in 18.5ml 2.5m CaCL2
  29. chemistry

    molar solubility of nitrogen at 25 degree celcius
  30. chemistry

    If 2.3 mol of has a volume of 1.1 L at 289 K , what is the pressure in atm ?
  31. chemistry

    how much ml of oxalic acid is needed to standardize 0.1M NaoH
  32. Chemistry

    which sign of chemical reaction is not detectable by sight?
  33. Chemistry

    I need help on a complex ion equation. I am not sure what the products are. Please help. Fe(OH)2 (s) + NaOH(aq)-->
  34. Chemistry

    Find the number of moles of particles for NaCl
  35. chemistry

    How many moles of ions are contained in 1.4 L of a 1.6 M solution of Mg(NO3)2?
  36. chemistry(ppm parts per million)

    How would i calculate 2.34 mg x 10^6 divided by 3.50 kg
  37. Organic Chemistry

    Is helium considered a noble gas?
  38. Chemistry

    How to separate acetic acid from aqueos solution.
  39. Chemistry

    if there are 8.3grams of Mg used, how many moles of MgO can you expect to be produced?
  40. Chemistry

    What are the names of all the classes of substances that conduct electricity?
  41. chemistry .....please help

    Which of these temperatures is closest to 100 K? A. -173 °C B. 18 °C C. 0 °F D. 212 °F
  42. Chemistry

    What is the molarity of 10g of H2SO4 in 100ml of water?
  43. Chemistry

    what mass of 12% solution can be produced from 60 grams of sugar?
  44. chemistry

    How can use litmus paper to distinguish an acid from a base?
  45. Chemistry

    Why is it not a good idea to use an antacid routinely? (two reasons)
  46. chemistry

    Besides actin and myosin, what is another example of a Contractile Protein? If you could tell me about its function too, that would help too. Thanks
  47. chemistry(solutions)

    What is the % w/v of 13.2 g of salt dissolved in 264 mL of solvent?
  48. Chemistry

    Can you determine the pH of a 1 liter solution having an H concentration of 1.0*10 to the negative 3.5
  49. college

    organic chemistry 121-------------how to do dimensionalysis solving..
  50. Chemistry

    What is the wavelength lambda of the photon that has been released in 2.05x10^-18?
  51. Organic Chemistry

    Why is helium considered a noble gas?
  52. Chemistry

    Last question I'm having trouble with. Predict the oxidation # for astatine. Why?
  53. Chemistry

    How many grams of bromine can be obtained by the decomposition of 92.0 of MgBr2?
  54. chemistry

    What are the oxidation numbers for the elements in the compound C2H5COOH?
  55. Chemistry

    In an aqueous solution the [OH–] is 2.0 x 10–6 M. What is the [H3O+]? Question 17 options: 1.0 x 10–7 M 2.0 x 10–6 M 1.0 x 10–8 M 5.0 x 10–9M
  56. Chemistry

    How does looking at phases of products and reactants show the Estamation of ÄS?
  57. Chemistry

    I have 250 grams of Al2(PO4)3 How many moles of Al are there?
  58. chemistry

    How do I change the molecular weight(58) of NaCl to grams?
  59. Inorganic Chemistry

    1) 5.0 mL of 6.0 x 10^-4 potassium 5.0 mL of the solution prepared above are then mixed with
  60. chemistry

    Is there a gas formed if you heat a sugar? What will be its identity
  61. Chemistry

    What is the energy and wavelength of a photon with a frequency of 91.5 MHz?
  62. organic chemistry

    how to filter when a compound recrystallize at zero degree
  63. chemistry

    what is the bond order of n2 positive, n2neagative, n2 2neagative?
  64. Chemistry

    Temperature is a measure of the amount of heat an object contains. T/F
  65. Chemistry

    How many mol of hydrogen present in 16g methane
  66. Chemistry

    Suppose we want to know whether on mixing h2o2 with fe+2,the oxidation of fe+2 to fe+3 will take place or not.
  67. chemistry

    What kind of conditions would I want if I wanted to get as much CO2 to go into a soda as I could?
  68. Chemistry

    why mass cannot be used as a property to identify a sample of matter?
  69. chemistry

    What is the mass of 4.3 × 10 to the power of15 atoms of nickel (Ni)?
  70. chemistry

    where would you find silicon dioxide outside a chemitry lab?
  71. chemistry

    write the oxidation and reduction half reactions for mg+au^+---->mg^2^++au
  72. chemistry

    where would you find silicon dioxide outside a chemitry lab?
  73. Chemistry

    How would I find the moles of H+ if I have 2.0 M HCl and 2.0 M NaOH solution?
  74. chemistry

    What is the percent yield if 23.5 of ethyl chloride is actually formed?
  75. Chemistry

    What is the reactant when sugar is mixed with water? Also, what is the product?
  76. chemistry

    If the H+ concentration goes from 1.0 x 10-5 to 2.0 x 10-4 moles/Liter what will happen to the pOH?
  77. chemistry

    Most alcohols are very safe to ingest. True or False
  78. Chemistry

    How many moles of C2H2 are produced by 3.5 mol CaC2?
  79. chemistry

    If a satellite orbits the earth at a velocity of 3.2 x 10⁶ km/hr, this would be the same as how many ft/s?
  80. Chemistry

    Draw all of the possible alkyne isomers of CH≡CCH2CH2CH2CH3.
  81. Chemistry

    An alcohol will form an alkoxide ion when reacted with what?
  82. chemistry

    what is the equation of the reaction between potassium sulphite and bromine
  83. Chemistry

    How much ethanol can be vaporized in 10 min. When under under direct sunlight?
  84. CHEMISTRY

    Is ostwald's viscometer use for measure coefficient of viscosity?
  85. chemistry

    What is the concentration of a solution if the absorbance is 0.66 and the constant (a x b) is 8.2 L/mol?
  86. chemistry

    Calculate the pH of a solution containing 10 g / L of NH4Cl (Kb NH3 = 1.8x10-5
  87. chemistry

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

    How to find the pH level in solid soap using an experiment?
  89. Chemistry

    What is the required volume of an acid to prepare 2 L of solution a 10% (v/v).
  90. chemistry

    Why can’t ethyne be turned into trans or cis isomers?
  91. chemistry

    why is it important to record detailed observations, not just conclusions?
  92. chemistry

    how do we calculate bond order of a molecule that has 3 different elements, like for example C-N-O
  93. chemistry

    If you have 1.90 moles of H_2 How many grams of NH_3 can be produced?
  94. chemistry

    The polyatomic anion contains elements 1,6,and 8. The cation has 10 electrons.
  95. Chemistry

    Identify which element is being oxidized and which is being reduced Mg (s) + 2H2O (g) = Mg(OH)2 (s) + H2 (g)
  96. chemistry

    What is the volume of 2.8 × 106 molecules He? Answer in units of L
  97. Chemistry

    How to prepare a 750mL stock solution with a 0.40 M Na2S2O3.
  98. Chemistry

    What is the compound name for Sb2(CrO4)5? This is the only question I am having trouble with.
  99. Chemistry

    What would the IUPAC name of the molecule: H2C=C=CH2 be? is 1,2-propene right?
  100. chemistry

    Find the percentage of water in Na2CO3*2H2O?
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