chemistry! URGENT

61,546 results, page 99

  1. Chemistry

    Balance Redox using reactions by the 1/2 reaction method. NaIO3 (aq) + KI (aq) -->„³ I2 (s)
  2. Chemistry II

    How long would it take to consume 13 mg of magnesium in 4.4 mL of 1.25 M HCl? Explain.
  3. Chemistry II

    How long would it take to consume 13 mg of magnesium in 4.2 mL of 1.25 M HCl? Explain.
  4. physical chemistry

    What is the Enthalpy of Decomposition of liquid Hydrogen peroxide (in kJ/mol)?
  5. chemistry

    Redox reaction in assign oxidation number is ca3(po4)2
  6. chemistry

    What is the molarity of a 28.9 g of CaCl2 dissolved in water to make up 0.78L of solution?
  7. Chemistry

    How would you prepare pure dry crystals of pottasium trioxonitrate (v) ?.
  8. chemistry

    if an excess of nitrogen is reacted with 3.41 g of hydrogen, how many grams of ammonia can be produced?
  9. chemistry

    the weight of one atom of uranium is 238 amu. its actual wt. is ......g
  10. chemistry

    How many milliliters of NO2 at 25.2 °C and 738 torr are needed to form 16.1 g of HNO3?
  11. chemistry

    What must be the velocity of a beam of electron if they are to display a de broglie wavelength of 1A°?
  12. chemistry

    4g NaOH is dissolved in 100mL of 2.5M H2SO4 will be required for its complete neutralization?
  13. CHEMISTRY

    If 2.5 * 10^-2 g of Fe(NO3)3 added to 100mL of 1.0 * 10^-4 M NaOH solution , will it produce precipitate ? thank you
  14. CHEMISTRY

    Why can't we use water in electrolytic cell during producing aluminium ?
  15. CHEMISTRY

    Is these two electrodes appropriate to create a good battery ? : Cd => Cd^+2 + 2e- and Fe => Fe^+2 + 2e- Explain
  16. Chemistry

    How much ethanol must be used to prepared 150 mL 10% by volume?
  17. chemistry

    how to find a structure factor of a face centerd cubic lattice
  18. Chemistry

    What is meant by 0.2mol (12g) of glacial acetic acid how can we make ?
  19. Chemistry

    why can't the enthalpy of magnesium be measured using a coffee cup calorimeter?
  20. Chemistry

    Calculate the maximun=m mass of ethanol that can be made from 5.6 tonnes of ethen
  21. Chemistry

    What is dS (J/K) of the process when 0.5874 moles of H2 gas are compressed from 37.13 L to 29.13 L at constant temperature?
  22. chemistry

    how many mL or .0252M HNO3 are required to neutralize 25.00mL of .0148M of Sr(OH)2? and how did you get the answer!!!
  23. Chemistry

    Suggest why calcium compound produce a coloured flame but magnesium do not?
  24. chemistry

    in a reversable reaction H2+I2=2HI,what will happen to the equilibrium if the volume is decrease?
  25. Analytical Chemistry

    principles behind the dilution and aliquoting of the NaOH solution
  26. chemistry

    Discuss the difference in lattice enthalpy between NaCl and CsF
  27. chemistry

    Nickel is about 2 millimeter thick or 2/1000 of a meter.how many nanometer is this?
  28. chemistry

    why does alka-seltzer dissolve faster in hot than cold water
  29. chemistry

    Calculate the number of moles of O atoms in a 2.5x10(-6)kg sample of C8H10N4O2
  30. chemistry

    state the separation technique for silver choride and sodium trioxonitrate
  31. Chemistry

    What functional groups do uracil,guanine,cytosine, and tyrosine belong to.
  32. Chemistry

    Give a acid-base pairs which produce Na2CO3 as a salt
  33. chemistry

    A 300mL solution was made by dissolving 5.0g of MgCl2 in water. What is its molarity?
  34. Chemistry

    Predict the physical properties and relative reactivity of Rb, Cs, and Fr (From the periodic table)
  35. Grade 9 Chemistry

    which is more reactive k or ca? ( from periodic table.) when poured in water?
  36. Chemistry

    How many numbers of oxygen molecules are present in 3 liters of CO2 at STP?
  37. Chemistry

    If 6.0 g of Oxygen (O2) reacts with 12.0 g of hydrogen (H2) to give 5.0 g of dihydrogen monoxide. What's the % yield?
  38. chemistry

    How many grams of HCl are formed from reaction of 3.58g of H2 with 8.90g of Cl2?
  39. CHEMISTRY

    Find the number of SiO2 formula units in m = 1.90g of quartz.
  40. Chemistry

    You need to make 500mls of a 7percent bovine serum solution
  41. Chemistry

    What mass KCl is needed to precipitate AgCl from 15.0 mL of .200 M AgNO3
  42. chemistry

    advantage of potentiometric titration over other titrimetric titiration
  43. chemistry

    How many molecules are in 105 g of sugar (C12H22O11)? Answer in units of molec
  44. chemistry

    How much does 1.9 mol of carbon dioxide weigh? Answer in units of g
  45. chemistry

    What is the volume occupied by 0.252mol of helium gas at 1.35atm and 305K ?
  46. chemistry

    how many milliliters of10.0m Hc(aq) are needed to prepare 890.0 ml of 1.00m Hcl(aq)
  47. chemistry

    We only can make ozone layer by adding 3 oxygen atoms or we cannot
  48. Chemistry

    Cs(s)+H2O(l)→ ? i thought it was H2+CsOH but the computer says that's wrong.
  49. Chemistry

    What is the molarity of a 2.50 x 102 cm3 solution containing 560.0 g of C6H12O6?
  50. Chemistry

    State the full electron configuration of a free nitrogen atom.
  51. chemistry

    Give a structure to match the name for the following compound. 2-pentanol
  52. Chemistry

    How many moles of LiF would be required to produce a 12.0 M solution with a volume of 10.5 L?
  53. chemistry

    At what temperature will freeze rastor 48.8 g of ethanol C2H5OH (Mr = 46) in dm3 of water (p = 1.86)
  54. chemistry

    How many formula units would there be in a 54.3 gram sample of sodium nitrate
  55. chemistry

    If 124 g of ice at 0.0°C is added to 1.36 L of water at 90 °C, what is the final temperature of the mixture?
  56. chemistry

    Consider the reaction, 4 NH3 + 5 O2 => 4 NO + 6 H2O How many grams of NO will be made from 10.7 moles of O2?
  57. Chemistry

    Balance the following equation in basic conditions CoCl2 (s) +Na2O2 (ag) ----> Co(OH)3 (ag)+Cl- (ag) + Na+ (ag)
  58. Chemistry

    What is the mass of a sample of (NH4)2SO4 that contains 8.01 x 10^24 atoms of oxygen
  59. Chemistry

    What is the mole fraction of O2 in a mixture of 15.1g of O2, 8.16g of N2, and 2.46g of H2? (PLEASE EXPLAIN WHAT YOU DO!) Thanks
  60. Chemistry

    Draw all of the possible alkyne isomers of CH≡CCH2CH2CH2CH3.
  61. Chemistry

    Calculate the energy (kJ) required to raise the temperature of 22g of water from 12 C to 90 C.
  62. chemistry

    0.195 m of ca oh 2 solution to neutralize 750 ML of a 0.235 m of hno3 and balance it
  63. Chemistry

    What is the pressure in a 22.1-L cylinder filled with 16.3g of oxygen gas at a temperature of 329K?
  64. Chemistry

    What is the concentration of sodium phosphate contains 0.60 M Na+? I'm not sure what to do and how to figure how to do this question.
  65. chemistry

    What is the balanced chemical equation Shampoo? please i need a help ASAP!
  66. chemistry

    cal culate the ph of a mixture of 100 ml distilled water and 2 ml of 2M of NaOH
  67. Chemistry

    The color of light emitted by a hot solid object depends on?
  68. chemistry

    potassium hydroxide and perchloric acid net ionic question
  69. chemistry

    sodium hydroxide and carbonic acid net ionic equation
  70. Chemistry

    'calculate the mass in amu of 2.879 1023 xenon atoms'
  71. chemistry

    All polymers made from polyethylene will have the same density.
  72. chemistry

    When the following equation is balanced, what is the coefficient for Ta? H2 + Ta2O3 → Ta + H2O
  73. chemistry

    Most alcohols are very safe to ingest. True or False
  74. chemistry

    When an acid and a base react in a neutralization reaction, the products will be acidic. T/F
  75. chemistry

    By what factor is the rate of a reaction changed if an enzyme lowers the Ea by 9.0 kJ/mol at 37°C?
  76. chemistry

    what mass of water is necessary to prepare 150.0g of 1.30% saline solution
  77. Chemistry

    What is product form when 2-bromobutane reacts with potassium cyanide in ethanol?
  78. chemistry(ppm parts per million)

    How would i calculate 2.34 mg x 10^6 divided by 3.50 kg
  79. chemistry

    write a chemical reaction for lead2 nitrate + sodium iodide ->
  80. chemistry

    Which alkyl halide should be used to prepare pent-2-ene and why?
  81. chemistry

    calculate the mass of Pbl2 produced by reacting of 30.0g Kl with excess Pb( NO3)2
  82. Chemistry

    Calculate the mass of a 0.253-mL sample of a liquid with density 0.789 g/mL
  83. Chemistry

    Calculate the pH and concentration of H3O+ of a 0.285M oxalic acid solution.
  84. Science-Chemistry

    Can you please help me solve r1/r2 = sqrt(M2/M1)for M1. My answer: M1=M2r2^2/r1^2 Is this correct?
  85. chemistry

    What is the mass (in kilograms) of a cube of silver that measures 0.26m on each side
  86. Chemistry

    For a certain reaction, Kp = 3.54 at 325 C. Find delta G 598 K in kJ/mol.
  87. oragnic chemistry

    convert the measurement 92.0g into pounds (1lb=453.6g)
  88. Chemistry

    What is the mass, in grams, of a pure iron cube that has a volume of 4.30 cm3?
  89. Chemistry

    lets say you have an F atom and an Ne+ ion. Which is more stable
  90. chemistry

    Skim milk has a density of 1.028 g/mL. How many grams are needed to get 0.786L?
  91. chemistry

    suppose 0.0139g of HNO3 is dissolved in 625 mL of aqueous solution. what is the pH
  92. chemistry

    Why material properties vary in spite of the similarity in crystalline form?
  93. chemistry

    How many moles of water does it take to make 477g of lithium hydroixide
  94. chemistry

    how do I calculate rate velocity using absorbence at 412/ min-1.
  95. chemistry

    how to calculate nuclidic mass of 3He when its binding energy is 0.76 MeV
  96. Chemistry

    True of False, Amorphous solids have crystal structures.
  97. chemistry

    What does ammonium Iodide equation look like dissolved in water?
  98. Chemistry

    Name three properties of metal for which metallic bonds are responsible
  99. Chemistry

    What is the method used to separate water from bleached wood pulp?
  100. chemistry

    How much heat (in kilocalories) is released when 7.87g of Al is used in the reaction?
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