Flask A contains 500 ml of whater at 25 celsius and flask B contains 250 ml of water at 50 celsius. Which flask has a higher heat content?

16,311 results
  1. science

    1.)A vacuum flask keeps its contents warmer or cooler than the surrounding environment for a length of time. It consists of two flasks, one inside the other, that connect at the neck. the space between the two flasks is completely empty of air answeres why

  2. Science

    Why does the design of the vacuum flask minimize heat transfer by conduction? A)One flask is smaller than the other flask. B)One flask is more reflective than the other flask. C)There is no air between the two flask. D)The two flask do not touch each

  3. chemistry

    A chemist dissolves 0.097 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 13.6-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4

  4. Chemistry

    A chemist dissolves 0.096 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 10.8-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4

  5. AP Chemistry

    The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

  6. College Chem

    If equal masses of O2 and N2 are placed in identical containers at the same temperature, which of the following statements is (are) true? a. both flasks contain the same number of molefules b. the pressure in the N2 flask is greater than in the other

  7. Chemistry

    A 5.00-L flask contains nitrogen gas at 25°C and 1.00 atm pressure. What is the final pressure in the flask if an additional 2.00 g of N2 gas is added to the flask and the flask cooled to -55°C?

  8. Chem

    a 4.369g sample of metal is placed in a flask. water is added to the flask and the total volume in the flask is read to be 126.4ml. the mass of the water, flask, and metal is 268.5g. if the mass of the flask is 139.3g and the density of water is 1.000g/ml,

  9. chemistry

    3. After removing membranes from an eggshell, the shell is dried and its mass is recorded as 5.613 g. The egg is transferred to a 250 mL beaker and dissolved in 25 mL of 6 M HCL. After filtering, the solution containing the dissolved eggshell is diluted to

  10. chemistry

    A 1 L flask is filled with 1.40 g of argon at 25 degrees celcius. A sample of ethane vapor is added to the same flask until the total pressure is 1.00 atm. Whatis the total pressure of Argon in the flask ? What is the partial pressure of ethane in the

  11. Chemistry

    Can you check my answers? Thanks!!!! What would happen to the volume-to-temperature ratio if: 1. One student failed to replenish the boiling water in the boiling-water bath as the flask was being heated. At the end of the 6 min of heating, the boiling

  12. chemistry

    A 2.00 L flask is filled with propane gas (C3H8)at 1.00 atm and -15.0 Degrees Celsius. What is the mass of the propane in the flask?

  13. chemistry

    A sample of gas (1.9 mol) is in a flask at 21 °C and 697 mm Hg. The flask is opened and more gas is added to the flask. The new pressure is 795 mm Hg and the temperature is now 26 °C. There are now __________ mol of gas in the flask.

  14. chemistry

    would the molar mass of a volatile liquid be incorrectly high, incorrectly low or unaffected if a)you did not completely vaporize the liquid when you heated it. b)the foil cap got wet while you were cooling the flask and its contents with running water c)

  15. Please Help Fast

    A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

  16. Chemistry

    A vilatile liquid was allowed to evaporate in a 43.298 g flask that has a total volume of 252 ml. The temperature of the water bath was 100 degree Celsius at the atmospheric pressure of 776 torr. The mass of the flask and condensed vapor was 44.173 g.

  17. Chemistry, HELP!!

    a) If the volume of a flask is 165 mL and the mass of the vapor in the flask is 0.2136 grams, what is the density of vapor in the flask? b)If the temperature of the vapor is 25 degrees Celsius, what is the molecular weight of the vapor? (Assume the gas

  18. chem

    You have two flasks of equal volume. Flask A contains H2 at 0°C and 1 atm pressure. Flask B contains CO2 gas at 0°C and 2 atm pressure. Compare these two gases with respect to each of the following mass of gas (Flask A:Flask B)

  19. chemistry

    A student placed 10.5 g of glucose C6H12O6 in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.mL mark on the neck of the flask was reached. The flask was then shaken until the

  20. Chemistry

    A chemist dissolves 0.095 g of CuSO4 · 5H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 39.7-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4 in

  21. Chemistry

    A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask? ---------------------------- I

  22. Chemistry

    Consider three 1.0 L flasks at 25° C and 96.66 kPa containing the gases CH4 (flask A), CO2 (flask B), and C2H6 (flask C). In which flask is there 0.039 moles of gas? flask A flask C flask B none all

  23. PHYSICS 102E

    1. A glass flask whose volume is exactly 1000cm^3 at 0 degrees Celsius is completely filled with mercury at this temperature. When the flask and mercury are heated to 100 degrees Celsius, 15.2cm^3 of mercury overflow. If the coefficient of volume expansion

  24. chemistry

    hey drbob222, where did u get 500ml from? question is: 1.00 mL of a 0.0500 M sucrose solution is transferred to a 100 mL volumetric flask, and the flask brought up to volume. 5.00 mL are taken from the 100 mL volumetric flask and transferred to a 0.500 L

  25. Chemistry

    A stoppered flask at 25 C contains 250 mL water, 200 mL octanol, and 50 mL of air. An unknown mass of o-xylene is added to the flask and allowed to partition among the phases. After equilibrium has been established, 5.0 mg of o-xylene are measured in the

  26. Chemistry

    A chemist dissolves 0.096 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 10.8-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4

  27. Chemistry

    A student obtained a clean, dry glass- stoppered flask. She weighed the flask and stopper on an analytical balance and found the total mass to be 33.695 g. She then filled the flask with water and obtained a mass for the full stoppered flask of 64.356 g.

  28. Chemistry

    Flask A contains 500 mL of water at 25 degrees Celsius and flask B contains 250 mL of water at 50 degrees Celsius. Which flask has a higher heat content? Explain your choice.

  29. chemistry

    A student obtained a clean, dry, glass stoppered flask. The weight of the flask and stopper was 32.634 g. The student filled the flask with water and obtained a mass for the full stoppered flask of 59.479 g. The density of water at the temperature of the

  30. Chemistry, Math

    A chemist dissolves 0.091 g of CuSO4 · 5 H2O in water and dilutes the solution to the mark in a 500-mL volumetric flask. A 31.8-mL sample of this solution is then transferred to a second 500-mL volumetric flask and diluted. What is the molarity of CuSO4

  31. Chemistry

    A student placed 12.0g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-ml mark on the neck of the flask was reached. The flask was then shaken until

  32. university of calabar

    A stoppered flask at 25 0C contains 250 ml water, 200 ml octanol, and 50 ml of air. An unknown amount of o-xylene is added to the flask and allowed to partition among the phases. After equilibrium has been established, 5.0 mg of o-xylene are measured in

  33. Stoichiometry

    A 3-L flask contains nitrogen gas at 21°C and 0.95atm pressure. What is the final pressure in the flask if an additional 4 g of N2 gas is added to the flask and the flask cooled to -59°C?

  34. Chemistry!

    A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask?

  35. Chemistry

    A student placed 14.0 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution

  36. Chemistry

    Is a beaker more precise in determining volume than an Erlenmayer flask??? Probably... More precise would be a graduated cylinder but if that's not an option I'd go with the beaker. See my answer to a similar question below. It all depends upon the size of

  37. chemistry

    Flask A contains 500 ml of whater at 25 celsius and flask B contains 250 ml of water at 50 celsius. Which flask has a higher heat content?

  38. chemistry

    Flask A contains 500 ml of whater at 25 celsius and flask B contains 250 ml of water at 50 celsius. Which flask has a higher heat content?

  39. Chemistry

    Consider three 1.0 L flasks at 25° C and 96.66 kPa containing the gases CH4 (flask A), CO2 (flask B), and C2H6 (flask C). In which flask is there 0.039 moles of gas? flask A flask C flask B none all

  40. Chem

    1.00 mL of a 0.0500 M sucrose solution is transferred to a 100 mL volumetric flask, and the flask brought up to volume. 5.00 mL are taken from the 100 mL volumetric flask and transferred to a 0.500 L flask, and it is brought up to volume. What is the

  41. chemistry

    (3 pts) The stockroom prepared a solution by dissolving 0.2300 g of Erythrosin B (MW = 879.87 g/mol) in DI water in a 250.00 mL volumetric flask. A student pipetted 5 mL of the stockroom solution into a 100.00 mL volumetric flask and diluted it to the mark

  42. Chemistry

    Why is a beaker more acurrate to use when measuring the evaporation over a period of time of a liquid instead of an Erlenmayer flask??? I don't know that it is. It depends upon the size of the Erlenmeyer flask, the beaker, how much water is in the

  43. chemistry

    A student placed 11.5 of glucose () in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution

  44. Chemistry

    A 1.00 L flask is filled with 1.05 g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pressure is 1.150 atm . a.)What is the partial pressure of argon, PAr, in the flask? b.)What is the partial pressure of ethane,

  45. Chemistry

    If 0.896 g of a gas occupies a 250 mL flask at 20 degrees Celsius and 760 mm Hg of pressure, what is the molar mass of the gas?

  46. Chemistry

    A 1L flask is filled with 1.25 g of argon at 25 degrees celcium. A sample of ethane vapor is added to the same flask until the total pressure is 1.45 atm. What is the partial pressure of argon in the flask?

  47. chemistry

    A 1-L flask is filled with 1.45 g of argon at 25 degrees C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35 atm. What is the partial pressure of argon in the flask?

  48. Biology

    I'm so horrible at biology so help is appreicated; "The following experiment is to test the limits of cell population growth. Cells were grown in six flasks under different conditions. Eash flask contained a nutrient broth of the same concentration. The

  49. chem

    1.00 mL of a 0.0500 M sucrose solution is transferred to a 100 mL volumetric flask, and the flask brought up to volume. 5.00 mL are taken from the 100 mL volumetric flask and transferred to a 0.500 L flask, and it is brought up to volume. What is the

  50. chem

    A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it

  51. Chemistry

    1.984 g of a hydrate of K2CO3 is dissolved in 250. mLs of H2O. 10.0 mLs of this solution is tirade against 0.100 M HCl, producing the following results. Flask 1 - Initial 0, final 9.2 Flask 2 - Initial 9.2, final 18.3 Flask 3 - initial 18.3, final 27.8

  52. molarity

    An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

  53. chemistry

    A 5 mL sample of an unknown liquid is placed into a 250 mL flask that has had all of the air removed. The pressure measured in the flask is found to be 39.9kPa. In a separate trial the student puts 214 mL of the same liquid into the same flask at the same

  54. Chem

    A flask of unknown volume was filled with air at a pressure of 389.0 kPa. The flask was attached to an evacuated flask of 32.0 L and the air was allowed to expand into the second flask. At equilibrium, the final pressure was 154.0 kPa. Calculate the volume

  55. physics

    a flask contains helium gas at 11k. the flask is thermally isolated and the gas is allowed to escape slowly through a narrow tube until the pressure within the flask is 0.98 atm and the temperature is 4.2K. if the gas is ideal, find the initial pressure

  56. quant chemistry

    A standard solution of Mn2+ was prepared by dissolving 0.250 g of Mn in 10 mL of concentrated HNO3 (measured with a graduated cylinder). The resulting solution was quantitatively transferred to a 100 mL volumetric flask and diluted to volume with distilled

  57. Chemistry

    An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is

  58. Chemistry

    An empty flask weighs 128.632g. After vaporization of a sample of volatile liquid, at a measured temperature of 99.8 C. The flask is sealed, cooled to room temperature, and weighed. The mass is now 129.225g. The measured P atm is 757.7 torr. The flask is

  59. science/chem

    You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take 50

  60. Science/Chem

    1. You dissolve 157.1 g of ammonium nitrate in a 250 mL volumetric flask and add water to the mark (call this solution A). You take 30 mL of solution A and place it in a 100 mL volumetric flask and add water to the mark (this is solution B). Next you take

  61. Chemistry

    Accurately weigh 0.9-1.1 g into a 200 mL beaker. Dissolve the KIO3 in a small amount of distilled water. Quantitatively transfer, with rinsing, to a 500 mL volumetric flask. Dilute to the calibration mark and shake well. Rinse the buret several times with

  62. physics

    I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

  63. chemistry

    in a lab experiment to obtain the molar mass of a voltaile liquid, the following data is obtained: volume of flask=225ml mass of flask=77.834gms mass of flask+gas=78.416gms temperature=100 degrees celsius pressure=714 torr What is the molar mass of the

  64. Chemistry

    an empty flask as a mass of 123.4 grams. When the flask is filled with water, the mass is 211.6 grams. If 10.0 grams of zinc (d=7.14 g/cm3) are added to the flask filled with water (and the sides of the flask are dried from the displaced water) what is the

  65. Chemistry-Please help

    A 3.00-L flask is filled with gaseous ammonia, . The gas pressure measured at 17.0 degree celsius is 2.35atm . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

  66. chemistry

    The molar mass of a volatile liquid(one which vaporizes easily) can be determined by a the 'Dumas Method.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

  67. chem

    A piece of lithium metal with a mass of 3.25g reacts with sufficient hydrochloric acid in a closed flask containing 235 mL of air originally at 0.991 atm and 18 C. The heat released in this reaction raises the temperature to 41.0 C inside the flask. a)What

  68. Chemistry

    Equimolar amounts of gas A and B, each at an initial partial pressure of 1.00 atm are combined in a flask. The flask is sealed and allowed to react to completion according to the reaction: 2A(g)+ B(g) --> C(g) What is the final pressure inside the flask?

  69. Chemistry

    A 5.00 L flask with mass of 463.873 g is filled with Ar gas to 3 atm pressure at 292 k. (19 celsius + 273) what is the mass of flask and gas?

  70. physics

    A Pyrex flask in a refrigerator at -8 degrees Celsius is filled to the top and holds exactly 1000cm^3 of ethyl alcohol. If the refrigerator fails, how much alcohol spills by the time the temperature reaches 22 degrees Celsius? The coefficient of volume

  71. chemistry

    A student placed 12.5 of glucose () in a 100.- volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the calibration mark on the neck of the flask was reached. The flask was then shaken until

  72. Chemistry HELP!

    A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mL mark on the neck of the flask was reached. The flask was then shaken until

  73. chemistry

    A 1-\rm L flask is filled with 1.35 g of argon at 25 {\rm ^\circ C}. A sample of ethane vapor is added to the same flask until the total pressure is 1.15 atm.What is the partial pressure of argon, P_Ar, in the flask?What is the partial pressure of ethane,

  74. AP Chem

    A student placed 17.5 g of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the

  75. chemistry

    Mass of Aspirin tablet: 0.357 g 10 mL of 1 M NaOH was added to the aspirin tablet in a 125 mL Erlenmeyer flask and heated to a boil. The solution was transferred to a 100 mL volumetric flask and the flask was filled to the mark with DI water. 1 mL of the

  76. How to Find the Minimal Volume?

    A sealed flask contains 0.60 g of water at 28 degrees celcius. The vapor pressure of water at this temperature is 28.36 mmHg. What is the minimum volume of the flask in order that no liquid water be present in the flask? ---------------------------- I

  77. chemistry

    A 1-L flask is filled with 1.25g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.45amt .What is the partial pressure of argon, Par, in the flask?

  78. AP CHEMISTRY

    The molar mass of an unknown organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

  79. chemistry

    1. mass of flask + cap = 92.53 g 2. mass of flask + cap + condensate = 94.34 g 3. mass of condensate = 1.81 g 4. volume of flask = 160 ml 5. temperature of water = 99.3 celsius 6. barametric pressure = 757 ml of mercury 7.. molar mass of gas(experimental)

  80. science-chemistry

    please anwser soon, a rigid 4.10L flask contains a mixture of 1.25 moles of H2, 0.250 mole of O2, and sufficient Ar so that the partial pressure of Ar in the flask is 1.00 atm. The temperature is 63.5 degrees C A) Calculate the total pressure in the flask

  81. Chemistry - Science (Dr. Bob222)

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

  82. College Gen.Chemistry

    A student wanted to determine the amount of copper in a sample of copper ore. The student dissolved a 2.500 ± 0.001 g piece of copper ore in about 75 mL of nitric acid; then, a complexing agent was added. The student transferred this solution to a

  83. Science

    For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, explain how this result occurs a) after removing the flask from the water bath, the experimenter cools the

  84. Chemistry

    For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

  85. Chemistry

    For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

  86. Chemistry

    For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

  87. Chemistry

    For each of the following experimental conditions determine whether molar mass would be: 1) too high, B) too low or C) unaffected. In each case, /explain/ how this result occurs a) after removing the flask from the water bath, the experimenter cools the

  88. Chemistry

    A flask of known volume was filled with air to a pressure of 3.6atm. This flask was then attached to an evacuated flask of known volume and the air was allowed to expand into the flask. The final pressure of the air (in both flasks) was 2.7atm and the

  89. Chemistry

    A 3-L flask contains nitrogen gas at 21°C and 0.95atm pressure. What is the final pressure in the flask if an additional 4 g of N2 gas is added to the flask and the flask cooled to -59°C?

  90. Chemistry

    A 1.250 g mass of standard aspirin is dissolved in approximately 20 mL of 1 M NaOH. This solution is added to a 250-mL volumetric flask and diluted to the mark with DI water. How many grams per mL of aspirin are in the resulting solution? (Note that a

  91. physics

    I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

  92. Physics

    I once was given a metal whiskey flask for being in my cousin’s wedding. When it got dented, I put in 1 gram of H2O (initially 21°C, just like the air filling the rest of the flask) and heated it up to boil the water. It popped the dent out. Assume the

  93. Chemistry

    A volatile liquid sample is placed in an Erlenmeyer flask that has been sealed except for a tiny hole that allows vapor to escape. Upon heating, the liquid is converted to vapor that fills the flask. Cooling the flask allows the vapor to condense back to

  94. Chemistry

    Suppose you dilute 20.0 mL of a 0.130 M solution of Na2CO3 to exactly 100.0 mL. You then take exactly 15.0 mL of this diluted solution and add it to a 250-mL volumetric flask. After filling the volumetric flask to the mark with distilled water (indicating

  95. Chemistry

    I have a concentrated solution in a 50mL volumetric flask that is 0.704 g/L and I take 100 microL of that and transfer that into another 50mL flask with water. What is the concentration of the new flask? I am really lost on this question. I don't know

  96. chem

    A student placed 13.5g of glucose (\rm C_6H_{12}O_6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. \rm mL mark on the neck of the flask was reached. The flask was then

  97. chem

    A 1-L flask is filled with 1.25g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pressure is 1.35atm . What is the partial pressure of argon, PAr, in the flask? What is the partial pressure of ethane, Pethane, in

  98. Chemistry Solubility help!!!!!!!!!

    INFORMATION: [HCl] = 0.1388 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water (7.4 mL of HCl needed to titrate) Flask B: 0.05 NaOH (12.1 mL of HCl needed to titrate) Flask C: 0.025 NaOH (10.8 mL of HCl needed to

  99. chemistry

    *Please help I don't know how to do any* *THE EXPLANATION* Lacy obtained a dry empty flask with a stopper and placed it on an analytical balance. She found the mass to be 36.765 g. Lacy then completely filled the flask with distilled water and forced all

  100. AP CHEMISTRY

    The molar mass of an unknows organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20