chemistry! URGENT

61,261 results, page 49

  1. Chemistry

    Most of the earth is made of what? Is it helium?
  2. chemistry

    how many moles of Nitrogen are in 80g of N2O?
  3. chemistry

    what happens in a condensation polymerization reaction?
  4. Chemistry

    Balance MgCO3 > CO2 + MgO
  5. Chemistry

    what is the mass in grams of 1.32 x 10^20 uranium atoms
  6. chemistry

    How many atoms are in 11 molecules of sulfur hexafluoride?
  7. chemistry

    what is the formula of iron III tannate?
  8. chemistry

    1. How many grams of NaCl are present in 15 mL of a 2.0% solution?
  9. chemistry

    What can cause high pressure inside a reactor?
  10. Chemistry

    how do you balance the equation with H3PO4(aq)and BaCl2(aq)?
  11. chemistry

    How is this equation balanced Al2(OH)3 S3 (s) + 3H2O (l) --->
  12. chemistry

    A sample of orange juice has a pH of 3.44. Its [H3O+] is
  13. chemistry

    Three oxyacids of phosphorus nd its structure
  14. chemistry

    salt spread on icy roads because
  15. Chemistry

    ÄSvap > 0 Give a molecular interpretation for
  16. Chemistry

    Describe how to make 500.0 mL of 3.6 M acetone
  17. Chemistry

    What quantum numbers specify these subshells? 2s n= l= 3p n= t= 6d n= l=
  18. chemistry

    The hybridization of the lead atom in PbCl4 is...?
  19. chemistry

    how can we find which kinetic energy is higher?
  20. chemistry

    How many moles of are needed to react with 0.460 ?
  21. Chemistry

    Which of the following will result in a chemical change?
  22. Chemistry

    find the volume of 56.4 g of a substance that has a density of 2.42 g/mL
  23. chemistry

    what elements follow the octet rule?
  24. chemistry

    What is pH of 0.1M solution of NH4Br, if the pKb of NH3 is 4.74?
  25. Chemistry

    How many moles of acid are there in 20 ml of a 2.0 M HCl solution?
  26. chemistry

    What role does RNA play in proteomics and why?
  27. Chemistry

    If pH = 6.6, calculate the molar concentration of H^ + (aq) in the solution.
  28. Chemistry

    560 mL of Xe will equal how many moles @ STP?
  29. Chemistry

    560 mL of Xe will equal how many moles @ STP?
  30. chemistry

    How many grams of solute are in 2.l L of 3.7Moles of Al(NO3)3
  31. chemistry

    Reaction between H2O2 +2NaOH
  32. chemistry

    why do beryllium and flourine combine in a 1 : 2 ratio ?
  33. chemistry

    Ca+NH3+Hcl will react to produce what?
  34. chemistry

    what is the molality of a solvent that is 0.15 degree celcius
  35. chemistry

    what is the pH of a 0.10 M solution of methylamine (CH3NH2, kb= 4.4*10^-4) at 25 degree C?
  36. chemistry

    what is the pH of a 0.10 M solution of methylamine (CH3NH2, kb= 4.4*10^-4) at 25 degree C?
  37. Chemistry

    What is the chemical breakdown of a cheese pizza
  38. chemistry

    Please help with the products: NaHCO3+H2SiF6= ????
  39. chemistry

    The number of moles in 15.39g of C2H6O?
  40. chemistry

    need to convert 5.26g/cm3 to m3
  41. Chemistry Help

    T=PV/nR P=0.96 V=0.045 n=0.002 g/mol R=0.082057
  42. Chemistry

    What's the lewis dot structure for CH2Cl2 ??
  43. chemistry

    How many osmoles are there in 6.00 ML of a 6.0 N mg3(po4)2 solution?
  44. chemistry

    0.0386mol glucose in 88.0ml of solution
  45. chemistry

    If we have a concentration of H+ at 1 x 10-1.2 mol/L, what is the pH value? A. -1.2 B. 0 C. 2.4 D. 1.2 A.
  46. Chemistry

    What are chiral carbons and why do they lead to isomers?
  47. Chemistry

    Why is the DNA information coded in "threes"?
  48. chemistry

    What is the number of water molecules that will form from 30 g of NO
  49. Chemistry

    Balance equation c2h3cl + br2
  50. Chemistry

    what is the bond length of sulfur trioxide?
  51. chemistry

    smallest particle of a covalent compound?
  52. Chemistry

    How many types of stoichiometry are there? Can you list them? Thanks I appreciate it!
  53. Chemistry

    What is the dilution formula? I have not learned this,
  54. Chemistry

    Write the half-reactions for F3+ + I- ---> F2+ + I2 and balance it.
  55. chemistry

    how to convert 2.80cm into grams?
  56. Chemistry

    Prepare 250 cc n/10 KMno4 solution
  57. Chemistry 12

    The value of Kb for HPO₄²- is? A. 2.2*10^-13 B. 6.2*10^-8 C. 1.6*10^-7 D. 4.5*10^-2 I don't get how to solve this.
  58. chemistry

    balance the equation c2h4(g)+o2(g)---c(s)+h2o
  59. chemistry

    why NH4+ ion is not strong ligand
  60. Chemistry

    How many moles of OCl2 contain 38.42 g of Cl? Answer
  61. Chemistry

    Fe 3+ + scn- + Na2PHO4 produces what exactly?
  62. Chemistry

    Why is the formula for potassium peroxide K2O2?
  63. chemistry

    newton 1st law of motion
  64. Chemistry

    Calculate the mass of each element in Na2CO3
  65. Organic Chemistry

    What is the Product of 1,4-Cyclohexadiene + KMnO4?
  66. chemistry

    how much pb can be isolated from 3.5kg of pbco3?
  67. Chemistry

    how can you prepare 300ml of 15% h2so4 solution
  68. Chemistry

    What is the lewis dot structure for copper?
  69. chemistry

    How do you find q in q=mC delta t without the mass
  70. chemistry

    "empirical formulas" p 889(153e)
  71. chemistry

    how many c atoms are contained in 15.63g of c5h12??
  72. AP Chemistry

    Formal charge: When do you use it? How is it calculated?
  73. AP Chemistry

    Formal charge: When do you use it? How is it calculated?
  74. chemistry

    Calculate the wavelength of a photon with energy 2.45 eV.
  75. chemistry

    Calculate the wavelength of a proton with energy 2.45 eV.
  76. chemistry

    What groups would be ionized in a solution of pH 12
  77. Chemistry

    How do you balance Fe2O3+C. 2Fe+CO2
  78. chemistry

    How to convert centimeters into grams
  79. college chemistry

    if my sublimation apparatus imploded, what was the cause of it?
  80. chemistry

    how many grams of h2 are required to produce 11/4000
  81. chemistry

    how do i balance SO3 + H2O = H2SO4
  82. Chemistry

    What is the C-C-H bond angle in the molecule H2CCO?
  83. chemistry

    draw the conformational structures is 2-methylpentane?
  84. Chemistry

    What is the pH of a saturated zinc hydroxide solution?
  85. chemistry

    5:8 emperical formula with hydrogen and carbon
  86. chemistry

    define elements, compound and molecules.
  87. chemistry

    What is the chemical equation of methylamine with CuSO4?
  88. Chemistry

    Assuming complete dissociation, what is the pH of a 2.55 mg/L Ba(OH)2 solution?
  89. chemistry

    how many moles of O2 are contained in 6.53 L with 297 K and 6.6 atm
  90. Chemistry

    What is the molecular equation for HCl(aq) + NH4OH(aq)?
  91. CHEMISTRy

    predict the product of the following: a.) Ca + H + OH => b.) Pb(NO3)2 + Cu =>
  92. chemistry

    How to calculate the molarity of commercial bleach
  93. Chemistry

    Express 798 mm Hg in units of atm
  94. chemistry

    How many Cl atoms are in a 2.54g sample of CCl4?
  95. Chemistry

    calculate the ph of titration of 50.0 ml of 0.140 m hclo (aq)
  96. Chemistry

    What volume does 3.01 x 10^21 molecules of N2 occupy at STP?
  97. Chemistry

    What is the formula for CoCl2 with 45.5 percent water?
  98. Chemistry

    3.00 g of H2 reacts with 200.0 g of AgCl. what is the yield?
  99. chemistry

    how many grams of oxygen are in 175 g of C5H10O5
  100. Chemistry

    Co-ordination number of Cr in dibenzene chromium is ??
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