chemistry! URGENT

61,552 results, page 65

  1. Chemistry

    Which gas diffuses most rapidly at STP? Ar, Kr, N2, or O2? Why?
  2. chemistry

    Diagram for the preparation of oxygen from potassium trioxochloric(v)
  3. CHEMISTRY

    HELP MY REPORT IS ABOUT SATURATED ND UNSATURATED SOLUTIONS
  4. Chemistry

    Rank Cd, Br, and Si from worst to best conductor of electricity. Is it Br, Cd, Si? Thanks -MC
  5. chemistry

    solve net ionic equATION Ba(OH)2 + Na2SO4
  6. Chemistry help

    How many grams if nh3 can be produced from 2.57mol of n2 and excess h2?
  7. Chemistry

    How many grams of H2 are needed to produce 12.88g of NH3?
  8. Chemistry

    How many molecules (not moles) of NH3 are produced from 3.65x10-4g of H2?
  9. Chemistry

    A+2B--->2C Kc=2.27 2c--->D Kc=0.144 Calculate the equilibrium constant for the reaction D--->A+2B
  10. Chemistry 192

    Give the electron configuration for the following: A) Ni^2+ B) Br^-
  11. Chemistry

    A solution has 0.45 mol of NaOH dissovled in 90 L of water. What is its [OH-]?
  12. chemistry

    calculate the number of molecules found in 4.50 g of water
  13. chemistry

    What is the product for Ni(s) + 2Na^+? I don't think this is possible. Am I wrong?
  14. chemistry

    how are buckeyballs,diamond, and graphite similar? how are they different?
  15. Chemistry

    What is the percent KCL by mass in a 3.00 molal solution?
  16. Chemistry

    what is the mass in grams of one molecule of water?
  17. CHEMISTRY

    What is the mass in grams of one Mole of water?
  18. chemistry

    Cabbage Juice Titration Lab connexus
  19. Chemistry

    explain equilibrium in terms of the collision theory
  20. Chemistry

    if a glass of ice water is at equilibrium, what is its temperature?
  21. Chemistry 2

    What is the solubility of silver chromate in pure water
  22. chemistry

    What are strongest intermolecular force in hydrogen iodide ?
  23. Chemistry 12

    what are the sources of error in preparing ester lab?
  24. Chemistry

    Calculate the molarity of 17.g of NaCl in 881 ml of solution
  25. CHEMISTRY HELP !!!!

    find kb or ka value for ZnCl2 show work! Thanks!
  26. Chemistry

    What is the activity of a 18.9 μCi sample of carbon-14 in becquerels?
  27. Chemistry

    The separate suspended solid from a solution , we may use .......
  28. Chemistry

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

    How much energy is needed to melt 25.4 grams od I2?
  30. Chemistry

    Calculate empirical formula C=41.7%,H=6.2%,N=19.3%, and O=33.1% Thanks. any help at all will be awesome!
  31. Chemistry

    What is the de Broglie wavelength of an electron traveling at 1.26×105m/s ?
  32. Chemistry

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

    what is the boiling point of 0.212 m lactose in water?
  34. chemistry

    what are three examples of a hypothesis? Or at least one....
  35. chemistry

    if 7 moles O2 are used, houch energy is produced?
  36. Chemistry

    How many moles of H2O are in 254 milligrams of water?
  37. Chemistry

    For ionic compound properties, what is the solubiity in hexane
  38. CHEMISTRY HELP !!!!

    what is the formula for dicyanobis (ethylenediamine) zirconium (IV) nitrate? Thanks!!!
  39. chemistry

    A cylinder contains 40 g of HE, 56 g of N2, and 40 g of Ar. How many moles of each gas are in the mixture?
  40. science

    can u suggest 5 advantages and 5 disadvantages of diffusion in chemistry
  41. chemistry

    What is the pH of a 0.001 M solution of acetylsalicylic acid (aspirin) (Ka 3.0 x 10-4)?
  42. chemistry

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

    What is the hybrid ization? SP 1,2,3 What is #sigma and #pi? Thank you so much for your help!! 😄
  44. Chemistry

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

    What are the differences between cis- and trans-isomers?
  46. Chemistry

    what is the pH solution in which 15 mL of 0.10 M NaOH has been added to 25 mL of 0.10 M HCl
  47. chemistry

    calculate the wt. of 6.022x 10^23 formula units of CaCO3
  48. chemistry

    ph of 6.10mL of 1.20M HCl diluted to 0.560L .
  49. chemistry

    express the following in exponential notation : (a) 0.0030
  50. chemistry

    Calculate the number of atoms in 3mol helium
  51. chemistry

    calculate the concentration of ammonium nitrate solution.
  52. Chemistry

    Why should you use only clean glassware?
  53. 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?
  54. Chemistry

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

    Calculate the percentage by mass for Carbon in C2H2
  56. chemistry

    What is the approximate Cl–Ca–F bond angle in the following molecule?
  57. Chemistry

    What are the orbital used in the formation of [COCL4]^2- ?explain this..
  58. Chemistry

    Why Mg2+ ion has smaller radius than Mg atom?
  59. organic chemistry

    or perhaps comparable over the counter?
  60. College Chemistry

    how many liters of ethanol contain 1.5 kg of ethonal?
  61. AP Chemistry

    Form 300 mL of 0.25 M Copper 2 sulfate pentahydrate
  62. chemistry of solutions

    NaI(aq)+Hg2(C2H3O2)2(aq)→
  63. chemistry

    230Th+He____223Po+2 2H+----- please complete this equation
  64. chemistry

    The density of (Hg) is 13.53 g/mL. How many liters will 4.2x10^21 atoms of Hg occupy?
  65. CHEMISTRY

    How does hydrogen bonding in water affects Density?
  66. chemistry

    Experimental Molar Ratio of Copper in CuxOy
  67. chemistry

    what is the final M solution prepared by diluting 5.0 mL of 6.0 M HCl to 60.0 mL
  68. chemistry

    Describe how to make 450mL of a 1.15% solution of CuSO4
  69. chemistry

    s shell never forms pi bonds ,right?
  70. Chemistry

    how many grams of NH3 can be produced from 4.35moles of N2 and excess H2
  71. Chemistry

    Chemical reaction for converting polythene to ethanol
  72. chemistry

    which unit is used to express the pressure of gas?
  73. Chemistry

    1/10e-8 in scientific notation. How do I solve this please.
  74. chemistry

    1/0.000015 in scientific notation. Please explain how to do this.
  75. chemistry

    How many Milliliters of 3.50 M HCl (aq)are required to react 5.75g of Zn(s)?
  76. chemistry

    Not sure how to complete this chemical reaction: Li + Fe(NO3)3 --->
  77. Chemistry

    what are the simplest molecules to synthesize a n,n-dimethyl-2-methylpropanamine
  78. Chemistry

    what are the simplest molecules to synthesize a n,n-dimethyl-2-methylpropanamine
  79. Chemistry

    What is the density (in mg/mL) of a H2S gas at 12.9 atm and 137 K?
  80. Chemistry

    What would cause the molecules of gas to get closer together?
  81. chemistry

    a solution consisting of 1.6M NaNO3 and 1.0M of Na(NO3)2 please help
  82. chemistry

    How much work is done when a 175g tomato is lifted 14.7m?
  83. chemistry

    how does one find out the moles of NaCl?
  84. Chemistry

    what does the Lewis Dot Structure of Sr(CN)2 look like?
  85. 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
  86. AP chemistry

    How do you balance ZnCO3 +O2 yields ZnO + CO2?
  87. chemistry

    Find the percentage of water in Na2CO3*2H2O?
  88. chemistry

    3 moles C6H12O6 in 100 ml equals what molarity?
  89. chemistry

    calculate the molarity of a g NaCl in 250 ml solution.
  90. chemistry

    3moles KI in 500 g of H2O equals what molality?
  91. chemistry

    how many moles of BaCl2 are in 300 g of H2O if the molality is 0.2 m?
  92. Chemistry

    Calculate Delta H for the following equation: Zn(s) + 2H+(aq) = Zn2+(aq) + H2(g)
  93. Chemistry

    Chemistrywhat is the weight of 1 atom of H in gram (at.wt Of h = 1.008) ?
  94. Chemistry

    Show how to calculate the molarity of 45 g of hcl in 1.5 L of water
  95. chemistry

    How many bonds can each atom make without hybridization? B,N, and O
  96. chemistry

    How many grams of CO(g) are in 0.944 L of the gas at 2.26 atm and 257. K?
  97. chemistry

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

    How many molecules are in 0.923 mol of selenium tetrabromide?
  99. chemistry

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

    is finding the molality and molarity the same concept
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