chemistry! URGENT

61,442 results, page 88

  1. Chemistry

    Which type of stoichiometric calculation does not require the use of the molar mass?
  2. chemistry 1

    what is the value of the coefficient for cobalt when the following equation is balanced Co(s)+ O2 (g)> Co2O3(s)
  3. chemistry

    How many grams of NaN3 are required to produce 17.4 ft3 of nitrogen gas?
  4. chemistry

    What is a complete ionic equation for the reaction between Pb(NO3)2 and NaI?
  5. chemistry

    how many moles are in a 65L sample of chlorine gas at 10degrees Celcius?
  6. chemistry

    double indicator titration of phosphoric acid with sodium hydroxide
  7. chemistry

    how do u calcualte the percent of hydrogen and carbon if given their mass in grams?
  8. chemistry

    How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
  9. chemistry

    How many moles of O2 are needed to combine with 0.646 mol Al to give Al2O3?
  10. Chemistry

    What would be the most likely product(s) when you react CuI with NH4OH?
  11. chemistry

    how many grams of solute are in 250ml of 0.500M glycerin . (C3H8O3=92.1 amu)?
  12. chemistry

    Determine the number of molecules of ethanol (C2H5OH) in 47.0 g. Can someone explain to me how to do this?
  13. chemistry

    How many moles of O2 are needed to combine with 0.288 mol Al to give Al2O3?
  14. chemistry

    what happens when sulphate ions are added to hydrochloric acid and then heated?
  15. chemistry

    Which of the following molecules is polar? 1. CH4 2. BH3 3. NH3 4. CF4 5. H2
  16. chemistry

    How could you recover sucrose or sodium chloride once it has dissolved in water?
  17. chemistry

    what is the product of reaction K3(Al(C2O4)3).3H2O with KMnO4 in the present of H2SO4?
  18. chemistry

    what happens when you place sodium hydroxide and water into a calorimeter?
  19. Chemistry

    Which of the following species would NOT function as an oxidizing agent? a. MnO4- b. Mn+2 c. H+ d. S e. Br-
  20. Chemistry

    why do elements within a group have similar chemical properties?
  21. chemistry

    What is the equation of the preparation of K3[Al(C2O4)3].3H2O using Al2(SO4)3?
  22. Chemistry

    How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?
  23. Chemistry

    What is the density of carbon monoxide gas at 127 celcius and 763 mm Hg?
  24. Chemistry

    How many mL of 0.225M HCl would be required to titrate 6.00 grams of KOH?
  25. chemistry

    what two metals that will not generate hydrogen gas when treated with an acid?
  26. chemistry

    how many grams of oxygen are formed when 500gof dinitrogen monoxide decomposes?
  27. chemistry

    How much water is added to 5.28 grams of ethanol to get a concentration of 1.67M?
  28. Chemistry

    How many grams of CuSo4 x 5h20 to prepare 100 mL of a .10M solution?
  29. Chemistry

    A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?
  30. chemistry

    What quantity of heat is required to warm 53.7 g of liquid water from 0°C to 100°C?
  31. college chemistry

    How do you calculate delta[S2O8 2-] in iodine clock reaction?
  32. Chemistry

    Determine the concentration of a dioxin solution whose percent absorbance is 0.40%
  33. Chemistry

    Rank the elements B, Al, Na, Mg from largest to smallest atomic radius. Would it be: Al, Mg, Na, B?
  34. chemistry

    According to this chemical reaction, which is the number of grams of Fe produce from 14 moles of H2?
  35. chemistry

    how can you fill a flask with pure oxygen without mixing it with air
  36. chemistry

    what is the molar change in enthalpy when 100 g of ice is heated from -18.2C to -7.2C?(C=37.4 J/K*mol)
  37. Chemistry

    The two most common forms of elemental carbon are graphite and
  38. chemistry

    What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2?
  39. Chemistry

    Determine the density of chlorine gas at 22C and 1.00 atm pressure.
  40. College Chemistry

    Quick Question - For a spontaneous reaction, ΔS°>0 and K >1. Is this always?
  41. Chemistry

    Have I balanced this equation correctly CN + NaOCL---OCN + NaCl
  42. Chemistry

    For which one of the following reactions is the value of H°rxn equal to H°f for the product?
  43. chemistry

    What is the complete ionic equation for CaS(aq) +CuCl2(aq)=CuS(s)+CaCl2(aq)
  44. chemistry

    How many grams of oxygen are required to react with 0.128 lead(II) sulfide?
  45. chemistry

    How many kilojoules are needed to vaporize 3.00 liter of ethanol at 78 degree celcieus?
  46. chemistry

    whatmass of (NH4)3SO4 is required to prepare 500cm3 of m/4 solution
  47. CHEMISTRY

    how many grams are contained in 0.50 mol of each compound? HCl Na2SO4 C2H2 and Al(OH)3?
  48. chemistry

    at what temperature does 16.3 g of nitrogen gas have a pressure of 1.25 atm in a 25.0 - L tank?
  49. 11th grade chemistry

    in 1D there are 4g of Zinc. How many moles of Barium Hydroxide are required?
  50. Chemistry

    what is the pressure exerted by 32g of 0xygen(O2) in a 22.0 L container at 30.0`C? What Law do I use?
  51. Chemistry

    What happens whena nucleus is stabilized by losing alpha particles?
  52. 7th grade chemistry

    how is calcium sulfate is prepared?what is the chemical reaction of this.
  53. chemistry

    What would be the result if 5.0 L of hydrogen were burned with 2.0 L of oxygen in a closed containner?
  54. chemistry

    Calculate the solubility (in g/L) of silver carbonate in water at 25°C if the Ksp for Ag2CO3 is 8.4 x 10^-12
  55. Chemistry

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

    Calculate the molar mass of baking powder (NH4)2CO3
  57. chemistry

    does any one know how to write cis-2,3-dibromo-2-hexene formula? Please help!
  58. Chemistry

    What is the product of a grignard reaction of bromotoluene and co2 as starting materials?
  59. Gen chemistry

    What is the hydronium ion concentration of an acid rain sample that has a pH of 3.45?
  60. chemistry

    is molar enthalpy affected if the system is a solid rather than a liquid
  61. Chemistry

    What three conversion factors are often used in mole conversions?
  62. chemistry

    when 5.0 g of CaCl2 is dissolved in 50 g of water, how do you get the boiling temperature of 101.5 degree c
  63. chemistry

    can the concentrations of reactant and products affect the directions of equilibrium constant
  64. chemistry

    Which of the following groups of elements is arranged in order of increasing electronegativity? a. Br < Li < C b. K < Mg < O c. Na < K < N d. Mg < Li < C e. Ca < Cl < C
  65. Chemistry

    Which element can form more than one kind of monatomic ion? 1. a. Se 2. b. Sn 3. c. S 4. d. Sr
  66. chemistry

    What is the pH of the solution created by combining 8.00 mL of the 0.10 M NH3 with 8.00 mL of the 0.10 M HCl? I found their moles= 8*10^(-4)
  67. chemistry

    What volume of 12M HCl must be diluted to make 2L of solutioin with a pH of 4?
  68. chemistry

    What are the missing nuclear symbols for the bombardment reation? 25/13Al + 30/15? >>> 30/15P + 1/0n
  69. Chemistry

    If 55.0 kJ of heat are added to 20.0 g of water at 20oC, what is the final temperature of the system?
  70. Chemistry

    What equation is used when talking about airplane cabin pressure?
  71. chemistry

    Which of the following is a weak acid? A)HN03 B)H3P04 C)NH3 D)C03^2- E)OH
  72. Chemistry

    Write a balanced chemical reaction showing how the 4.99 g Sn dissolves in HNO3.
  73. chemistry

    Which of these pressures is the lowest? 1.1 atm, 16.7 psi, 740 mm Hg, 111 458 Pa
  74. chemistry

    What volume of SO2 will result from the complete burning of sulfer in 8L of oxygen?
  75. College Chemistry

    Does Vapor Pressure decrease as intermolecular forces increase???
  76. chemistry(check my answer)

    For the cell: C(s) C+(aq) B+(aq) B(s). Metal ______ is the "negative" electrode. is it C(s)
  77. Chemistry

    what particle is emitted from the nucleus during a proton and neutron decay?
  78. chemistry

    how to find the volume of oxygen at STP from the Deoomposition of 10.8 g of mercuric oxide?
  79. college Chemistry

    What is thhe pH of 500mL of solution containing 0.0124 grams of Ca(OH)2?
  80. chemistry

    at what temperature would the sloubility level of 50 g KCL in 100 g H2O?
  81. chemistry

    what happen when a solution of NaoH is add in drop and then in excess to Cacl
  82. chemistry

    How much energy is released when 2.55kg of diethyl ether freezes?
  83. chemistry

    What is the concentration (in % mass) of a solution in which you dissolve 200 mg of NaHCO3 in 1.0 L of water?
  84. chemistry

    How many mL of 0.750 M HCl are needed to neutralize 14.89 mL of 0.350 M NaOH? ____ mL
  85. chemistry

    What is the IUPAC name of the following compounds? CH3 I CH3CHCH2CH2CHCH2CH3 I CH2CH3
  86. chemistry

    17.9 moles of NaOH in 500 ml of water? please tell me the answer
  87. chemistry

    find the molarity of 9.0*10 (to the -4 power) moles of Mg(OH)2 in 1500 ml of water. what is the answer?
  88. Chemistry

    Is 10.0 mL of 0.10 M NH4Cl added to 10.0 mL of 0.10 M HCl a basic buffer? I think Yes. Right?
  89. Chemistry

    What is the name of the product when cinnamaldehyde and cyclopentanone undergo aldo condensation?
  90. chemistry

    how do i write a procedure for making a 100mL of 0.5 M solution of sodium phosphate
  91. chemistry

    What gas volume does the water have at a temperature of 100 and 1 pressure?
  92. Chemistry 212

    What is the solubility of RaSO4 in 0.1381M Na2SO4? Ksp = 4.3x10^-11?
  93. chemistry

    how many grams of ammonium sulfate are needed to make a .25 M solution at a concentration of 6M?
  94. Chemistry

    Calculate the [H3O+] when 1.65 grams of KOH are dissolved in 500.0 mL of solution
  95. chemistry

    what you would do to prepare 100.0g of a 3.5% solution of ammonium sulfate in water
  96. SCIENCE?CHEMISTRY***

    an 56 Fe 2+ particle has how many protons neutrons amd electrons??? 56 2+ Fe Thanks Andy
  97. chemistry

    How many significant figures are in each of the following a.234 b. 2500 c.0.0034. d. 12.00 e. 0.01010
  98. chemistry

    How much heat does calcium oxide produce when dissolved in water?
  99. Chemistry

    Why is the sign for cathode positve and anode is negative in the galvanic cell?
  100. chemistry

    calculate the volume of .100 M KOH required to titrate 50 ml of .15 M HCl
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