chemistry! URGENT

61,843 results, page 67
  1. Chemistry

    Calculate the percentage by mass for Carbon in C2H2
  2. Chemistry

    The molecules present in 5.2gms of glucose will be c6h12o6
  3. chemistry

    how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution
  4. chemistry

    could the products ever become the reactants in chemical reaction? explain. thanks!
  5. Chemistry

    Why is trioxonitrate v acid not used for preparing hydrogen from metals
  6. chemistry

    balance the equation:C2H6 + O2 = CO2 + H2O
  7. chemistry

    i mean state symbols for the equation: 2Mg + O2 = 2MgO
  8. Chemistry

    If 2.5 g of NaOH is dissolved in 253 mL of water, what is the pH of the solution?
  9. chemistry

    What is the pH of a 0.250 M NH4Cl solution? Kb for NH3 = 1.8 × 10−5. Thank you.
  10. AP Chemistry

    What is the pH of a .20M HA solution (Ka=1.0x10^-6) that contains a 0.40M NaA?
  11. Chemistry

    not much of a question but more of an appreciation, thanks for helping i was really confused before today
  12. Chemistry

    Round to the correct number of significant figures. 1) 6.02/2.23 2.70 2) 18.42/2.34 7.87 3) 35.15/3.10 11.3
  13. chemistry

    a granola bar contains 175 calories. what is that in joules?
  14. chemistry

    what is the type of catalyst that corresponds the use of the platinum wire
  15. chemistry

    is it better to describe a buffered solution as resisting or preventing all changes in pH? why?
  16. chemistry

    this isnt helping, i am not understanding how to decide what to figure out first
  17. chemistry

    what flaws exist in Dalton's model of the atom?
  18. chemistry

    What are the reduction potentials of lithium, sodium and potassium?
  19. Chemistry

    the mass in grams of 125 ion atoms
  20. chemistry

    what difficulty must be overcome when mixing water and margarine? why?
  21. chemistry

    how many grams of kno3 should be used to prepare 2.00 l of a 0.500m solution
  22. Chemistry

    Calculate the percentage by mass for Carbon in C2H2
  23. Chemistry

    What is the balanced equation of the complete combustion of 2-methylpropane?
  24. Chemistry

    Calculate the number of ion 16g H2CO3
  25. Chemistry

    What volume of 17 M sulfuric acid must be used to prepare 0.15 L of 1.78 M H2SO4?
  26. Chemistry

    What mass of Ca(OH) 2 is required to make 1.5 l of a 4.0% (w/v) solution of Ca(OH)2 in water?
  27. chemistry

    how can I find the mass of 0.0225 mole of NH3?
  28. Chemistry

    Classify as acidic base or neutral [H+]= 6.0*10^-10M
  29. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  30. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  31. chemistry

    does elements with low energy have high frequency?
  32. Chemistry

    Can anyone tell me why the answer that I got here is not correct? Pb(s) + AgNO3(aq) yields Ag(s) + PbNO3(s)
  33. Chemistry

    dose the gasoline react with HCL 28%? if OK, what is its equation? Thanks
  34. chemistry

    What factors affect the rate of diffusion of one gas through another
  35. chemistry

    How many oxygen atoms are present in 2.00 millimoles of H2SO4?
  36. chemistry

    What volume will 0.35 mol of Ar occupy at -10 degress C and 0.96 atm?
  37. chemistry

    how does electronegativity and charge effect a solutions solubility
  38. Chemistry PLZ HELP!!!!!

    how are intermolecular forces different from chemical bonds?
  39. chemistry

    what is 124.5 when rounding to the 3rd significant figure?
  40. chemistry

    what is the connection between periodic trends and relative reactivity?
  41. chemistry

    At 25 degrees celsius, what is the mass in grams of 2.5L of mercury?
  42. chemistry

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  43. chemistry

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

    Is the dissolution of calcium sulfate endothermic or exothermic? How do you know?
  45. chemistry

    What clear liquid has a density of 0.814 g/mL but is not an alcohol?
  46. chemistry

    many formulae which ends with ite,ate ide
  47. Chemistry

    Gives isomeric compound of C3 H8 O woth IULAC names
  48. chemistry

    if you disolve 2.00 mol KI in 1.00 L of water will you get a 2.00 M solution? explain please
  49. chemistry

    how many grams of propane do you need to combust 525 kJ of heat
  50. Chemistry

    what is the percent by volume of 15.0 mL of ethanol in 0.250 L of water?
  51. chemistry

    1.why is potassium permanganate used in the process of distillation of water?
  52. Chemistry

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

    What is the molarity (M) of a 627 mL solution that contains 12.7 g of ethanol, CH3CH2OH?
  54. chemistry

    What is the shape and bond angle of PH3? Explain
  55. AP Chemistry

    What is the weight of 6.3 × 10 21 atoms of phosphorus? Answer in units of g
  56. chemistry

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

    convert 1.5ft^3 to liters show work
  58. chemistry

    Ethanol glycol has a density of 1.11 g/cm^3. What is the volume in L of 4.1 kg of this liquid?
  59. Chemistry

    what are electronegativity, electron affinity, and ionization energy?
  60. Chemistry

    What is the equilibrium constant of the reaction 2NO2 (g) with 3.0 M and N2O4 with 2.5M
  61. chemistry

    If 50.0 g of NaCl is mixed with 100.0 g of water at 80.0 °C, how much will not dissolve?
  62. chemistry

    can a nonpolar molecule be made up of polar bonds
  63. chemistry

    What is the net ionic equation for the reaction of AgNO3 with Ba(OH)2?
  64. chemistry

    theoretically, how much iodoform could be prepared from 25ml of 95% ethanol(sp. gr. 0.79)?
  65. chemistry

    Calculate number of moles of aluminum in 1.50kg of Al
  66. Chemistry

    Explain the role of CH3CO2Na n the preparation of Fe(C5H7O2)3)3
  67. chemistry

    how many grams of CaO can form if 82.o g of CaCO3 decomposed
  68. Chemistry

    What is the significance of the distance between two metals in the activity series?
  69. Chemistry

    How many moles of solute particles are present in 1 L of 1.20 M KBr?
  70. chemistry

    how to complete (2.8 x 10 to the 7th) x (8.8 x 10 to the 4th) in scientific notation
  71. chemistry

    Explain the effect of molecular polarity on behavoir
  72. Chemistry

    What neutral atom has the same number of electrons as Sc3+
  73. Chemistry

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

    How much naoh and hno3 is needed to make nano3?
  75. chemistry

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

    IF YOU HAV 1.40 MOLES OF H2O HOW MANY OF NH3 CN BE PRODUCED.
  77. chemistry

    If a reaction mixture contains 28 of , 150 of , and 36 of , what is the limiting reactant?
  78. Chemistry

    Does group 18 elements like He, Ne, Ar, Kr soluble in organic solvents?
  79. Chemistry

    Explain the role ch3co2na in the preparation of fe(c5h7o2)3
  80. chemistry

    how to dilute 7.75g of conc. HCl in 1000cm3?
  81. chemistry

    The compound X4C3 contains 15.03% carbon. What is the chemical symbol for X ?
  82. chemistry

    What pressure in kpa is exerted by 94.6 g CO2 at 57°C in 0.750 dm 3
  83. CHEMISTRY

    Is ostwald's viscometer use for measure coefficient of viscosity?
  84. Chemistry

    Is C12H22O11 soluble in water and is it ionic or a acid?
  85. chemistry

    find the concentration of Pb^2+ in equilibrium with PbBr_2_ and 0.10M Br^-
  86. DrBobb222!! Help!!

    Please look at my Chemistry problems again, I reposted them with the constants and such. I am still confused!
  87. Chemistry

    In the lab, as acid concentration got decreased, the Ka got increased. Why ?
  88. Chemistry

    Is my answer correct? 25g/2.5cm^3 equals 1g/cm^3
  89. chemistry

    How many electrons in a cesium atom can have the quantum numbers of n = 3 and ml = -1
  90. Chemistry(Please help, thank you!!)

    What is the oxidation number of sulfur (s) in NaHSO3? I know that Na is 1 but I do not know what else to do. Please explain, thank you for your help!!
  91. chemistry

    What is the energy of green light with a wavelength of 5.50x10^-7m?
  92. chemistry

    find the density of ethyl alcohol if 80.0 cm^3 "weighs" 63.3g.
  93. chemistry

    theoretically, how much iodoform could be prepared from 25ml of 95% of ethanol(sp.gr. 0.79)?
  94. Chemistry

    What is the volume of 0.674 kg of acetylene, C2H2, at STP?
  95. chemistry (lab)

    how or where does the hat energy produced by the candle come from ?? help me!
  96. chemistry

    explain the polarity in ethanol? why it is polar molecule? thanks
  97. Chemistry

    a sample of C3H8O that contains 200 molecules contain how many atoms?
  98. Chemistry

    Why does Aluminum and Sulfur have low ionization energies?
  99. chemistry

    which is the more active metal 2Li+Cu(NO3)2----2LiNO3+Cu
  100. Chemistry

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