chemistry! URGENT

61,546 results, page 67

  1. chemistry

    Tell me plz how we can characterize the compound K3[Al(c2o4)3]?
  2. Chemistry

    If a solution has a large Kb value, will it have a high pH?
  3. Chemistry

    Which THE PH VALUE OF A solution 0,01 mol/l a monoacido that presents ka= 1×10-6
  4. Chemistry

    how many L of O2 are needed to react completely with 63.0 L of H2S and STP?
  5. Chemistry

    Name the element that has a density of 4.700 g/mL at STP
  6. chemistry

    How much energy is absorbed to change 7.25 g of ice at -3 C to 25.5C?
  7. Chemistry

    What is the pOH of a 0.2M buffer solution of NH 4 + 0.2M NH4NO3 at 25 ° C. PKP = 4.74
  8. Chemistry

    How does the molecular wight of the gas affect the k-value?
  9. Chemistry

    how do you make 400 ml pf 2 Osm solution of Mg CL2?
  10. Chemistry

    What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?
  11. chemistry

    Let I know the equation with symbol of 'iron2oxide from iron fillings'
  12. chemistry

    What are the correct IUPAC names for triisopropylmethane and 2,2-dimethylcyclopentane?
  13. chemistry

    what does the spectrum of hydrogen tell us about its electrons?
  14. Chemistry

    Why do warm temperatures speed up the fermentation of milk?
  15. Chemistry

    Why is methanol a good solvent to recrystallize biphenyl?
  16. Chemistry

    What will be the volume of ammonia formed from 2L of nitrogen and 2L of hydrogen
  17. Chemistry

    I need to write a hypothesis on limiting reactants.
  18. Chemistry

    how many atoms are there in 1.13 liters of hydrogen peroxide H2O2?
  19. Chemistry

    Calculate the weight % of HOAc in pure Vinegar?
  20. Chemistry

    What is the mass needed to make 8.5L of a 4.0 M solutution of Na2SO4? (Na=23, s=32, O=16)
  21. Chemistry

    How many grams of nitrogen are present in 2 moles of HNO3?
  22. chemistry

    what is the charge balance equation for acetic acid?
  23. Chemistry

    How do you complete the following by writing products? #1.Ca(OH)2+MgCl
  24. chemistry

    I don't understand the difference between endothermic and exothermic?
  25. Chemistry

    Water is a great solvent for ionic compounds because of its ??
  26. Chemistry

    Why is the equivalence point pH of the HCl-TRIS titration = 4.6?
  27. chemistry

    1.how to prepare a)200ml of a 4MHCl? b)100ml of a 1.5NaOH?
  28. Chemistry

    What is the solubility, in moles/liter, of PbCl2 if the Ksp =7.3 x 10^12
  29. Chemistry

    0.0045 M HNO3 calculate the H3O concentration
  30. Analytical Chemistry

    Calculation Of K2mno4 In Lab Class?
  31. Chemistry

    What is the osmolality of 1.1% NaCl salt solution? How can I calculate this?
  32. Chemistry

    How many ethane will be burnt to produce 0.1moles of steam.
  33. Chemistry

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

    A solid at room temperature that can conduct electricity
  35. Chemistry

    Which of the following orbitals designations are not possible? explain why. A: 8s, 2d, 7p, 4f, 1f. B: 3f, 6p, 3d,1p, 8d.
  36. science(chemistry)

    How is ethanol after 1 minutes of evaporation
  37. Chemistry

    5 grams of H2 reacts with 16 g of O2, which in excess? 2H2(g)+O2(g)=2H2O(g)
  38. Chemistry

    In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative Cu^+2 Cu(s) Zn(s) Zn^+2***
  39. Chemistry

    What is the pH of a 0.05 M solution of acetic acid knowing that it was 2% ionized
  40. Chemistry

    In the zinc-copper cell, Zn(s) | Zn^+2(1M) || Cu^+2(1M) | Cu(s), which electrode is negative? Cu^+2 Cu(s) Zn(s)*** Zn^+2
  41. Chemistry

    98.4 * (1/2)^(19/3.8) = 3.075 g CH3COOH*** H2PO4^– LiOH NH3
  42. chemistry

    How many significant figures are in the measurement 603.040 g? A. 3 B. 4 C. 5 D. 6 C?
  43. Chemistry

    When the equation Fe + O2→Fe2O3 is balanced, the coefficient for O2 is: A. 4 B. 3 C. 1 D. 2 D?
  44. chemistry

    . Which of the following is not a way an atom can achieve stability?
  45. chemistry

    Calculate number of electrons present in 9.5g of PO4^3-
  46. Chemistry

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

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

    Why water can be used as a solvent in paper chromatography?
  49. chemistry

    Discuss the structure of bonding in copper acetate?????
  50. chemistry practical

    Why? alkaline solution didn't puppet out.
  51. chemistry

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

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

    molar solubility of nitrogen at 25 degree celcius
  54. Organic Chemistry

    Why is helium considered a noble gas?
  55. Chemistry

    How much oxygen will we get from 120 grams of KClO3?
  56. Organic Chemistry

    Is helium considered a noble gas?
  57. Chemistry

    if the solubilty of AgC2H3O2 is 5.0 x10^-2mol/L. What is the Ksp?
  58. chemistry

    which acid produces brown fume on heating?
  59. Chemistry

    What is the number of molecules in 22. 4 dm^3 of nitrogen gas at STP?
  60. chemistry

    ?Fe(2+)+?NO3(-)+H(+)==》No+Fe(3+)+H2O What's the balanced equation?
  61. ap chemistry

    What is the [H3O+] of a solution with [OH-] = 6.3 × 10-4 M? A. 6.3 × 10-18 M B. 10.80 M C. 6.3 × 10-4 M D. 1.6 × 10-11 M DrBob222 can you help me with this question please?
  62. Chemistry

    Calculate the number of moles of Cl atoms in 6.28 mg CuCl2.
  63. chemistry

    A compound contains 74,27%C;7,79%H;12,99%N. Determine the empirical formula. C=12;H=1;N=14;0=16.
  64. Chemistry

    How do you write the isotopic symbol for Uranium -238?
  65. Chemistry

    What are the names of the reactants in this equation? Mg (s) + 2HCl (aq) --> MgCl2 (aq) +H2 (g)
  66. chemistry

    Say some exples for true solutions.
  67. Chemistry

    How do you do significant figures. How dobyou do dimensional analysis
  68. Chemistry

    How would you make .25 Liters of a .1 M MgCl2 solution?
  69. Chemistry

    Why sulphur dioxide is not directly dissolve in water?
  70. chemistry

    what is the reaction between potassium chloride and bromine?
  71. Chemistry

    How many germanium atoms are present in 0.155g of the metal?
  72. Chemistry

    5.58g of Fe reacted with 3.0g of oxygen. How many moles of Fe were used?
  73. Chemistry

    Illustrate how to prepare a 1:3 solution of 0.5M hydrochloric acid
  74. Chemistry

    What is the pH of distilled water supersaturated with CO2 at 100psi?
  75. Chemistry

    How can I draw a lewis dot structure of XeF2O?
  76. chemistry

    what is the name of this coordination compound [CoSO4(NH3)5]Br?
  77. Science, chemistry

    Electrophilic substitutions reaction of pyrrole
  78. chemistry

    What is the molar solubility of silver carbonate, Ag2CO3?
  79. chemistry

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

    What is the mass in grams of a 15.8 L sample of ozone (O3) at 1.67 atm and 30.0 °C?
  81. Chemistry

    Which reaction below represents the second ionization of Lr?
  82. Chemistry

    A reaction of hydrolysis of Ba(NO) in a net ionic form?
  83. chemistry

    Cu+HNO2-Cu(NO3)2+NO solved by oxidation no. Method
  84. chemistry

    why is the spectrum of hydrogen composed of discrete lines?
  85. chemistry

    illustrate how to prepare a 1:3 solution of 0.5 hydrochloric acid
  86. chemistry

    what is the procedure for the preparation of 10 gram of lead iodide
  87. physics biology chemistry and ict

    WHAT ARE THE ALLOTROPES OF ANTIMONY
  88. Chemistry

    What group of elements were not on the original periodic table
  89. Chemistry

    what is the acid that is used to make ammonium nitrate???
  90. chemistry AS

    how do you draw the skeletal structure for (z)-pent-2-ene.
  91. Chemistry

    How many molecules present in 500ml of 42g NaHCO3?
  92. Chemistry

    How many moles Of (Al2SO4)3 can be prepared from 2.5ml Of H2SO4
  93. chemistry

    Calculate the energies of the states of hydrogen atom with n=2 and n=3
  94. Chemistry

    Calculate ΔG° for each of the reactions below in kJ. (a) Sn(s) and Pb2+(aq) (b) Cr(s) and Cu2+(aq)
  95. CHEMISTRY!!

    What intermolecular forces are responsible for neoprene's stretchiness?
  96. Chemistry

    What intermolecular forces are responsible for neoprene's stretchiness?
  97. Chemistry

    Calculate the number of moles of 2.8 of nitrogen (iv) oxide.
  98. chemistry

    Al2Br6, xpress your answer as a chemical formula?
  99. Chemistry

    Calculate the number of valence electrons in BF3.
  100. Chemistry

    Why was sublimation performed under reduced pressure?
  1. Pages:
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. 6
  8. 7
  9. 8
  10. 9
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99
  101. 100